Patents Issued in January 4, 2007
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Publication number: 20070001751Abstract: A system and related method are provided for producing a reference bias current that varies within a limited threshold from its nominal value based on band gap voltage, and that generates the bias current substantially independent from process and temperature. In one embodiment, the invention provides a process dependant voltage generator, a temperature independent voltage generator, and a voltage to current converter receiving inputs from bandgap voltage generator and a temperature independent voltage generator to generate a bias current that is substantially independent from process and temperature.Type: ApplicationFiled: September 29, 2005Publication date: January 4, 2007Applicant: ESS Technology, Inc.Inventor: Raj Sundararaman
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Publication number: 20070001752Abstract: An internal voltage generation circuit of a semiconductor device is disclosed. The internal voltage generation circuit comprises a reference voltage generator for generating a reference voltage having different levels depending on different operation modes of the semiconductor device, an active voltage generator for generating an active internal voltage of a level based on the reference voltage, a standby voltage generator for generating a standby internal voltage of a level based on the reference voltage, and an active voltage generation controller for controlling the active voltage generator such that the active voltage generator outputs the active internal voltage in a specific period after completion of a self-refresh mode.Type: ApplicationFiled: December 30, 2005Publication date: January 4, 2007Applicant: HYNIX SEMICONDUCTOR INC.Inventor: Seung Jin
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Publication number: 20070001753Abstract: An internal voltage generation circuit of a semiconductor device includes: a comparator for comparing a reference voltage level with a detection voltage level to provide a comparison signal; an internal voltage output device for raising a voltage of an internal voltage output terminal to a predetermined level in response to the comparison signal; and an internal voltage output controller for controlling the internal voltage output terminal to be raised to a selected level. A voltage applied to the internal voltage output terminal is outputted as an internal voltage.Type: ApplicationFiled: December 29, 2005Publication date: January 4, 2007Inventor: Sang-Jin Byeon
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Publication number: 20070001754Abstract: A discrete time filter achieves gain by sampling a signal using capacitors arranged in a one configuration and then changing the capacitors to a series configuration to develop a filter output voltage. In at least one embodiment, a variable gain filter is achieved by varying the number of capacitors that are active in the filter.Type: ApplicationFiled: June 29, 2005Publication date: January 4, 2007Inventors: Hasnain Lakdawala, Krishnamurthy Soumyanath, Stewart Taylor, Stefan Anderson
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Switchable high-pass configuration and an optical receiver with a switchable high-pass configuration
Publication number: 20070001755Abstract: The invention relates to a switchable high-pass filter arrangement which has a lower limiting frequency determining the high-pass filter behavior. The arrangement includes a transistor circuit, which has at least one transistor in a common-gate or common-base connection; a capacitive component in series with the input of the transistor circuit; and a programmable device for setting the operating current of the transistor circuit. In this case, the limiting frequency of the high-pass filter arrangement is switchable by means of the programmable device for setting the operating current of the transistor circuit. This creates a switchable high-pass filter arrangement which does not have any changeover switches in the signal path, is suitable for radiofrequency applications and can be produced in a simple manner. The invention furthermore relates to an optical receiver having a high-pass filter arrangement of this type.Type: ApplicationFiled: April 13, 2005Publication date: January 4, 2007Inventor: Ing. Schrödinger -
Publication number: 20070001756Abstract: A system for reducing the calibration time of a Power Amplifier (PA) (202) is provided. The system includes a memory module (304) that is integrated in the PA. The memory module is configured to store one or more calibration parameters of the PA.Type: ApplicationFiled: June 29, 2005Publication date: January 4, 2007Inventors: Robert Trocke, Armin Klomsdorf
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Publication number: 20070001757Abstract: A switched capacitor system with output glitch reduction step charges the switched capacitor by switching it to a first voltage level in a first phase, to an intermediate voltage level of a pre-charge node in a pre-charge phase and to the voltage level of the output node of the amplifier stage in a settling phase; the pre-charge node can be implemented at the input of the amplifier stage, the output of a preceding stage or at any other pre-existing suitable node in the amplifier system.Type: ApplicationFiled: June 30, 2005Publication date: January 4, 2007Inventor: Olafur Josefsson
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Publication number: 20070001758Abstract: A multiple differential amplifier system and method for transconductance mismatch compensation which in a first phase connects to a differential switched input of a null amplifier, the differential signal input of the main amplifier, inverted, for compensating for offset errors and transconductance mismatches in the null amplifier; and storing in a null storage device connected to an auxiliary input of the null amplifier the output of the null amplifier representing the compensation for the offset error and transconductance mismatch of the null amplifier; and in a second phase connecting the differential switched input of the null amplifier to the differential feedback input of the main amplifier and storing in the main storage device connected to an auxiliary input of the main amplifier the output of the null amplifier representing the compensation for the main amplifier offset error and transconductance mismatch.Type: ApplicationFiled: June 30, 2005Publication date: January 4, 2007Inventors: Alasdair Alexander, Chau Tran
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Publication number: 20070001759Abstract: A signal level adjusting apparatus comprises an amplifier that amplifies an input signal with a gain of a first gain value and outputs an amplified signal; a gain calculator that obtains a second gain value according to a signal level of the input signal; and a gain updater that updates the first gain value stepwise such that the first gain value approaches the second gain value by steps corresponding to an error between the first gain value and the second gain value.Type: ApplicationFiled: July 1, 2005Publication date: January 4, 2007Applicant: Sanyo Electric Co., Ltd.Inventor: Seiji Kawano
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Publication number: 20070001760Abstract: A buffer amplifier, which includes a first differential signal amplifier including first and second NMOSFETs (N-type metal-oxide semiconductor field-effect transistors) amplifying differential input signals; a second differential signal amplifier including first and second PMOSFETs (P-type metal-oxide semiconductor field-effect transistors) amplifying the differential input signals; a first feedback resistor including an end commonly connected to drains of the first NMOSFET and the first PMOSFET and the other end commonly connected to gates of the first NMOSFET and the first PMOSFET; a second feedback resistor including an end commonly connected to drains of the second NMOSFET and the second PMOSFET and the other end commonly connected to gates of the second NMOSFET and the second PMOSFET; and a current source providing a bias current for driving the first and second differential signal amplifiers, is provided.Type: ApplicationFiled: May 23, 2006Publication date: January 4, 2007Inventors: Ick-jin Kwon, Seong-sik Song, Yun-seong Eo, Heung-bae Lee
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Publication number: 20070001761Abstract: In a differential amplifier and an operational amplifier each for amplifying a signal, a differential signal composed of first and second signals is inputted to a couple of input terminals (1, 2). When the voltage of the first signal is, e.g., less than the voltage value of a reference voltage source (15), a comparator (13) senses it and a switch circuit (12) switches to a first current source (6) and a current from a third current source (11) flows into the first current source (6) so that a current is inhibited from flowing in the first differential couple (4). As a result, the inputted differential signal is amplified and outputted only through a second differential couple (5). In a situation in which the voltage of the first signal exceeds the voltage of the reference voltage source (15), on the other hand, the switch circuit (12) switches to a current source (7) so that the inputted differential signal is amplified and outputted only through the first differential couple (4).Type: ApplicationFiled: September 12, 2006Publication date: January 4, 2007Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Masayuki Ozasa, Akio Yokoyama
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Publication number: 20070001762Abstract: A method is described comprising conducting a first current through a switching transistor. The method also comprises conducting a second current through a pair of transistors whose conductive channels are coupled in series with respect to each other and are together coupled in parallel across the switching transistor's conductive channel. The second current is less than and proportional to the first current.Type: ApplicationFiled: June 30, 2005Publication date: January 4, 2007Inventors: Gerhard Schrom, Peter Hazucha, Vivek De, Tanay Karnik
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Publication number: 20070001763Abstract: A transconductor for substantially canceling or reducing a direct current (DC) output offset and a method thereof are provided. The transconductor includes a differential amplifier, a sensing circuit, and a feedback current generation circuit. The differential amplifier outputs output signals having a DC output offset therebetween due to a difference between input signals or a mismatch between input terminals. The sensing circuit senses the DC output offset and outputs a sensing signal. The feedback current generation circuit provides a feedback current for adjusting a level of the output signals to the input stage of the differential amplifier in response to the sensing signal. Accordingly, the transconductor substantially cancels or reduces the DC output offset between the output signals in response to the feedback current.Type: ApplicationFiled: February 17, 2006Publication date: January 4, 2007Applicant: Samsung Electronics Co., LTD.Inventor: Ho-Jung Ju
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Publication number: 20070001764Abstract: In one embodiment, the present invention includes an apparatus having a first amplifier stage to receive an input voltage and to provide an amplified output voltage at an output terminal, where the first amplifier stage is controlled by a first bias current. The apparatus may further include a second amplifier stage coupled to receive a control voltage and to provide an offset voltage to the output terminal, where the second amplifier stage is controlled by a second bias current. The first and second bias currents may be controlled by a single bias controller.Type: ApplicationFiled: June 30, 2005Publication date: January 4, 2007Inventors: Yunteng Huang, Susumu Hara
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Publication number: 20070001765Abstract: Monolithic transformer based amplifier for integrated circuits. The amplifier includes an input transformer with a first impedance transforming ratio. The input transformer includes a coupled line structure. An amplification circuit is coupled to the input transformer. The amplifier also includes an output transformer with a second impedance transforming ratio that is coupled to the amplification circuit.Type: ApplicationFiled: July 2, 2005Publication date: January 4, 2007Inventor: Kohei Fujii
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Publication number: 20070001766Abstract: According to an exemplary embodiment, an amplification module includes a power amplifier configured to receive an RF input signal and provide an RF output signal. The amplification module further includes an autobias control circuit configured to receive and convert the RF output signal to a control signal. The control signal can cause the power amplifier to have a quiescent current that increases substantially linearly in response to an increase in the RF output power of the RF output signal. The autobias control circuit can include a peak detector/log converter circuit coupled to a first input of a differential amplifier, where the differential amplifier outputs the control signal. The autobias control circuit can further include a DC reference circuit coupled to a second input of the differential amplifier. The amplification module further includes an analog bias circuit coupling the control voltage to a bias input of said power amplifier.Type: ApplicationFiled: June 29, 2005Publication date: January 4, 2007Inventors: David Ripley, Paul Andrys, Keith Nellis
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Publication number: 20070001767Abstract: A power amplifier circuit including a first transistor, a second transistor, and a power control circuit. The first transistor includes a first input and a first output. The second transistor includes a second input coupled in series with the first output of the first transistor. The input circuit is coupled to the second input of the second transistor. The control circuit includes a time delay circuit and a variable source.Type: ApplicationFiled: September 11, 2006Publication date: January 4, 2007Applicant: Broadcom CorporationInventor: Chris NILSON
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Publication number: 20070001768Abstract: A broadband low noise amplifier and amplification method is provided. The broadband low noise amplifier includes an input terminal into which a radio frequency (RF) signal received by an antenna is input, an output terminal from which an amplified RF signal is output, at least one gain control part connected in parallel with loads of the output terminal to adjust the gain of the amplified RF signal, and at least one load tuning part that resonates with loads of the output terminal to adjust the resonance frequency of the load impedance. The method includes amplifying the input RF signal and outputting the amplified RF signal to an output terminal, where a gain of the amplified RF signal is adjusted by switching operations of at least one switching device connected in parallel with a load of the output terminal.Type: ApplicationFiled: May 11, 2006Publication date: January 4, 2007Inventors: Dae-yeon Kim, Hyun-koo Kang, Jae-young Ryu, Ju-ho Son, Jeong-ho Lee
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Publication number: 20070001769Abstract: Circuitry and methods for improved amplifiers with large bandwidth and constant gain are provided. The combination of a synthetic inductive drain load and a bridged-T matching network provide amplifiers that can drive a substantial capacitive load with the above mentioned improvements over prior amplifiers. Additionally, circuits presented allow for improved rise time and insensitivity to temperature variations.Type: ApplicationFiled: September 8, 2006Publication date: January 4, 2007Inventor: Steven Roach
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Publication number: 20070001770Abstract: A PLL is provided, comprising a first divider, a PFD, a loop filter, a VCO, a second divider and a controller. The first divider receives a reference signal and divides the reference signal by R to obtain a divided signal. The PFD compares the divided signal and a feedback signal to generate a compared The VCO selects one of a plurality of operating curves for oscillation based on a selection signal, and generates an oscillation signal based on an operating voltage generated by signal the loop filter. The second divider divides the oscillation signal by N to obtain the feedback signal. The controller operates in an initial mode to recursively determine the selection signal by calculating differences of the feedback signal and the divided signal. When the selection signal converges to stable, the PLL switches to a normal mode to operate on the corresponding operating curve.Type: ApplicationFiled: June 20, 2006Publication date: January 4, 2007Applicant: Airoha Technology Corp.Inventors: Chung-Cheng Wang, Chao-Shi Chuang, Yi-Chuan Liu
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Publication number: 20070001771Abstract: An oscillation circuit comprises a ring oscillator configured to have at least an odd number of stages of inverters, and a frequency multiplier section configured to output as a multiplied output, an exclusive OR of signals taken out from the inverters at least at two stages of the ring oscillator.Type: ApplicationFiled: June 29, 2006Publication date: January 4, 2007Applicant: Kabushiki Kaisha ToshibaInventors: Chikahiro Hori, Akira Takiba, Masanori Kinugasa
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Publication number: 20070001772Abstract: In a method for stabilizing a transfer function of a digital phase locked loop a random digital signal is fed into the phase locked loop. The phase locked loop comprises the transfer function and a phase locked loop gain which changes with time due to disturbances and the random digital signal comprises a predetermined variance. The transfer function depends from the phase locked loop gain. A cross correlation function is generated by cross correlating a signal of the phase locked loop with the random signal and an impulse response is estimated between the random signal and the signal of the phase locked loop by means of the cross correlation function and the predetermined variance of the random signal. The transfer function of the phase locked loop is set in dependence on the estimated impulse response.Type: ApplicationFiled: June 29, 2006Publication date: January 4, 2007Inventor: Nicola Da Dalt
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Publication number: 20070001773Abstract: There is disclosed a whispering gallery oscillator for producing a low noise microwave output signal. The whispering gallery oscillator comprises a dielectric resonator 1 comprising paramagnetic ions 34. A pump signal 5 is coupled by a coupler 7 to the paramagnetic ions to excite 19 the paramagnetic ions 34. The paramagnetic ions 34 decay 17 and thus excite a whispering gallery mode 15 of the dielectric resonator 1. The whispering gallery mode 15 is coupled by a coupler 10 to give an output signal 9. The whispering gallery mode 15 has a high Q (Q?107) resonance. The high Q resonance results in a low-noise output signal 9. The paramagnetic ions 34 act as a MASER that is distributed about the dielectric resonator 1. In some embodiments, the whispering gallery oscillator may be locked to a frequency standard.Type: ApplicationFiled: March 15, 2006Publication date: January 4, 2007Inventor: Mark Oxborrow
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Publication number: 20070001774Abstract: A system, apparatus, and method to connect an oscillator network to multiple parallel oscillator circuits. The apparatus may include multiple modules located within a platform, where each of the multiple modules includes an internal oscillator circuit and the platform includes an input port; and an oscillator network located external to the platform. The oscillator network is coupled to each of said internal oscillator circuits through the input port. Other embodiments are described and claimed.Type: ApplicationFiled: June 29, 2005Publication date: January 4, 2007Inventors: Paul Stevenson, Jon Tourville, William Lahey
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Publication number: 20070001775Abstract: In accordance with certain described implementations, a voltage controlled oscillator (VCO) includes a VCO coarse tuning bank having multiple coarse tuning bank bits. Each coarse tuning bank bit has an associated bit capacitance. The bit capacitances of the coarse tuning bank bits may be selectively engaged using, for example, a single switching transistor for each coarse tuning bank bit.Type: ApplicationFiled: June 30, 2005Publication date: January 4, 2007Inventor: Hongjiang Song
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Publication number: 20070001776Abstract: A frequency synthesizer is provided having a fractional-N control circuit and method. The control circuit can operate as having a modulator that selectively applies any fractional ratio to a frequency divider within, for example, a feedback loop of a PLL. The modulator can be a delta-sigma modulator or any sequential state machine that can be implemented as the control circuit, and can select amongst a plurality of vector values. The vector values can be spaced relatively close to each other, and the incoming present vector values can each be added to a value chosen from the immediately preceding set of potential values. The selector circuit chooses from among the present set of vector values depending on whether the sum is nearest a target value. The sum nearest the target value is, therefore, selected as the present vector value, and the process is repeated in time for each vector value having a corresponding P value to form a pattern of P values sent to the divider of the PLL.Type: ApplicationFiled: June 30, 2005Publication date: January 4, 2007Inventor: Shuliang Li
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Publication number: 20070001777Abstract: A normal mode noise suppressing circuit comprises: a noise suppressing section (10) provided on conductor lines (3, 4); and a capacitor (31) having an end connected to the conductor line (3) and the other end connected to the conductor line (4). The noise suppressing section (10) comprises: a winding (15a) inserted to the conductor line (3); a winding (15b) coupled to the winding (15a) through a magnetic core (15c); an injection signal transmission path (19); a capacitor (16); and an inductance element (18). The injection signal transmission path (19) has an end connected to the conductor line (3) and the other end connected to the conductor line (4). The winding (15b) and the capacitor (16) are inserted somewhere along the injection signal transmission path (19). The inductance element (18) is inserted to the conductor line (3) at a point between the winding (15a) and the node between the injection signal transmission path (19) and the conductor line (3).Type: ApplicationFiled: April 23, 2004Publication date: January 4, 2007Applicant: TDK CORPORATIONInventors: Masaru Wasaki, Hitomi Wasaki, Yoshihiro Saitoh
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Publication number: 20070001778Abstract: A system useful in providing communications with automatic data collection (ADC) devices employs an antenna located in a potentially hazardous environment, a radio circuit located in a non-hazardous environment, and a coupling apparatus to provide an interface between the antenna and the radio circuit that prevents electrical discharges from occurring in the potentially hazardous environment.Type: ApplicationFiled: June 30, 2005Publication date: January 4, 2007Applicant: Intermec IP Corp.Inventors: James Lundberg, Robert Zigler, For Lam
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Publication number: 20070001779Abstract: In a balun for mutually converting an unbalanced line for unbalanced input/output and a balanced line for balanced input/output, the unbalanced line and the balanced line are microstrip lines including a signal line arranged on one main surface of a substrate and a ground conductor arranged on the other main surface of the substrate. The balun further includes a slot line formed by a aperture line arranged in the ground conductor in the other main surface. The microstrip line as the unbalanced line includes one end portion used as an input/output end and the other end portion that traverses the slot line, electromagnetically couples to the slot line, and functions as an electric short-circuited end. The central portion of the microstrip line as the balanced line traverses the slot line and electromagnetically couples to the slot line. Both ends of this microstrip line serves as the input/output ends.Type: ApplicationFiled: June 30, 2006Publication date: January 4, 2007Inventors: Fumio Asamura, Kenji Kawahata, Katsuaki Sakamoto
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Publication number: 20070001780Abstract: An adjustable low pass filter and directional coupler used in microwave communication are combined to reduce the size of the microwave circuit. The low pass filter portion and coupling portion are made independently tunable with a plurality of varactors and variable reactance circuits connected to ground.Type: ApplicationFiled: June 30, 2005Publication date: January 4, 2007Inventor: Todd Nichols
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Publication number: 20070001781Abstract: A piezoeletric resonator includes: a substrate; a lower electrode formed on or above the substrate; a piezoeletric body formed on or above the lower electrode; an upper electrode formed on or above the piezoeletric body; and a cavity under a vibrating portion formed by the lower electrode, the piezoeletric body, and the upper electrode. Where a resonant frequency of vibration with a thickness of the vibrating portion being a half of a wavelength is taken as fr, an average of ultrasonic velocity in a material forming the cavity is taken as Vc, and a value determined based on the resonant frequency fr and the average of ultrasonic velocity Vc is taken as ?c (=Vc/fr), a depth of the cavity is set so as to be equal to or larger than n×?c/2??c/8 and equal to or smaller than n×?c/2+?c/8.Type: ApplicationFiled: July 18, 2006Publication date: January 4, 2007Inventors: Hiroshi Nakatsuka, Keiji Onishi, Hiroyuki Nakamura, Takehiko Yamakawa, Hiroshi Yamaguchi
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Publication number: 20070001782Abstract: A noise filter includes a plurality of LC parallel resonant circuits having a plurality of coils which are connected in series and electrically connected to external electrodes at both ends thereof, and capacitors which are connected in parallel to the coils, respectively, and are disposed inside an insulator while being sequentially connected in tandem to signal wires. Resonance frequencies of the respective LC parallel resonant circuits are preferably different from each other. Further, a shield electrode is disposed between the coils, and the shield electrode also defines a capacitance-forming electrode for preventing magnetic coupling between the two coils.Type: ApplicationFiled: July 29, 2005Publication date: January 4, 2007Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Soitsu Sasaki, Tomohiro Sasaki, Haruhiko Ueno, Shigekatsu Yamamoto
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Publication number: 20070001783Abstract: A plurality of mechanically coupled MEMS resonators that are arranged in an N×M MEMS array structure. Each MEMS resonators includes a plurality of straight (or substantially straight) elongated beam sections that are connected by curved/rounded sections. Each elongated beam section is connected to another elongated beam section at a distal end via the curved/rounded sections thereby forming a geometric shape (e.g., a rounded square). Further, each resonator is mechanically coupled to at least one other adjacent resonator of the array via a resonator coupling section. The resonator coupling sections may be disposed between elongated beam sections of adjacent resonators. The resonators, when induced, oscillate at the same or substantially the same frequency. The resonators oscillate in a combined elongating (or breathing) mode and bending mode; that is, the beam sections exhibit an elongating-like (or breathing-like) motion and a bending-like motion.Type: ApplicationFiled: June 30, 2005Publication date: January 4, 2007Inventors: Markus Lutz, Aaron Partridge, Zhiyu Pan
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Publication number: 20070001784Abstract: A microresonator includes a beam-type resonator element in which a beam that is an oscillating portion of the resonator element has a high-resistance portion or an insulating portion.Type: ApplicationFiled: June 19, 2006Publication date: January 4, 2007Inventors: Shinya Morita, Takashi Kinoshita, Masahiro Tanaka, Masahiro Tada, Shun Mitarai
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Publication number: 20070001785Abstract: The present invention aims to provide a surface acoustic wave (SAW) device including at least two interdigital transducer (IDT) electrodes placed with a predetermined space therebetween on a piezoelectric substrate with improved passband characteristics without increasing the device size. The device includes IDT electrodes 2 and 3 placed with a predetermined space therebetween on a main surface of a piezoelectric substrate 1 and satisfies the formula: 0<(W/D)*fo/109?0.6, where fo is a center frequency measured in Hz, W is the interdigitated length of the IDT electrodes 2 and 3 measured in mm, and D is the distance between the IDT electrodes 2 and 3 measured in mm.Type: ApplicationFiled: June 2, 2006Publication date: January 4, 2007Applicant: EPSON TOYOCOM CORPORATIONInventor: Kunihito Yamanaka
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Publication number: 20070001786Abstract: A filter comprises a band pass filter that may have a first resonator, a second resonator and a coupling between the first resonator and the second resonator. The coupling may be controlled by at least one of (i) a spacing between the first resonator and the second resonator, and (ii) a shunt inductance coupled to the coupling.Type: ApplicationFiled: July 1, 2005Publication date: January 4, 2007Inventor: Arun Kundu
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Publication number: 20070001787Abstract: A filter circuit device includes a resonator unit configured with six or more resonators, the resonators being divided into a first resonator group including resonators connected in parallel and having odd-numbered resonance frequencies and a second resonator group connected to the first resonator group in parallel and including resonators connected in parallel and having even-numbered resonance frequencies, a delay unit connected between the first and second resonator groups to make a phase difference in a range of (180±30)+360×j degrees (j is a natural number) between the first and second resonator groups, a power dividing unit configured to divide a power to the resonators, and a power combining unit configured to combine outputs of the resonators of the first and second resonator groups between which the phase difference is made.Type: ApplicationFiled: June 30, 2006Publication date: January 4, 2007Inventor: Hiroyuki Kayano
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Publication number: 20070001788Abstract: A radiated mode coaxial cable comprising an outer conductor provided with a periodic aperture array, comprising a plurality (n) of apertures or aperture sets, repeated along the length of said outer conductor whereas a constant spacing s separates the left end of the first aperture of one array and the left end of the first aperture of a next array, wherein each array comprises at least 10 apertures or aperture sets, whereas the global length L (in mm) of the apertures or aperture sets is larger than (10 D/n)1/2 where D is the diameter of the cable (in mm) and whereas the aperture spacing (d) in between two successive apertures or aperture sets is larger than 1.5 w where w is the aperture width in the cable axis direction, and wherein the spacing s between two successive aperture arrays is selected so that ?opt.1/(??r?0.866)<s<?opt.2/(??r?1), where ?opt.1 and ?opt.Type: ApplicationFiled: June 26, 2006Publication date: January 4, 2007Inventor: Willy Pirard
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Publication number: 20070001789Abstract: According to some embodiments, a waveguide cable includes a dielectric core and a conducting layer surrounding the dielectric core. A first antenna may be provided at a first end of the waveguide cable to receive a digital signal and to propagate an electromagnetic wave through the dielectric core. A second antenna may be provided at a second end of the waveguide cable, opposite the first end, to receive the electromagnetic wave from the dielectric core and to provide the digital signal.Type: ApplicationFiled: June 29, 2005Publication date: January 4, 2007Inventors: Ricardo Suarez-Gartner, Stephen Hall, Bryce Horine, Anusha Moonshiram
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Publication number: 20070001790Abstract: An apparatus is described for burn-in and/or functional testing of microelectronic circuits of unsingulated wafers. A large number of power, ground, and signal connections can be made to a large number of contacts on a wafer. The apparatus has a cartridge that allows for fanning-in of electric paths. A distribution board has a plurality of interfaces that are strategically positioned to provide a dense configuration. The interfaces are connected through flexible attachments to an array of first connector modules. Each one of the first connector modules can be independently connected to a respective one of a plurality of second connector modules, thereby reducing stresses on a frame of the apparatus. Further features include for example a piston that allows for tight control of forces exerted by terminals onto contacts of a wafer.Type: ApplicationFiled: April 27, 2006Publication date: January 4, 2007Inventors: Donald Richmond, Frank Uher, Jovan Jovanovic, Scott Lindsey
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Publication number: 20070001791Abstract: An electrical switching apparatus includes a circuit breaker device having a molded housing with line and load ends, plural terminals disposed from the housing, and first and second handle devices. The terminals electrically and mechanically engage a circuit breaker mounting block. The first and second handle devices engage the housing at or about the respective line and load ends. The handle devices remove the circuit breaker device from the mounting block. Each of the handle devices includes an insulative barrier having a first portion, a second portion and a third portion. The first portion at least partially covers a corresponding one of the housing ends. The second portion is coupled to the housing at or about the corresponding one of the housing ends. The third portion is structured to be manually grasped in order to pull the insulative barrier together with the circuit breaker device away from the mounting block.Type: ApplicationFiled: June 29, 2005Publication date: January 4, 2007Inventors: Kenneth Fischer, Vicki Fodi, Glen Sisson
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Publication number: 20070001792Abstract: [Object]An object of the present invention is to provide a MRI superconductive magnet enables sharp images representing patients' health states to be produced. [Means for Achieving the Object]A MRI superconductive magnet having a superconductive coil, a liquid vessel of liquid helium used to cool the superconductive coil, a heat shield to accommodate the liquid vessel therein, a vacuum chamber to accommodate the heat shield therein, a load supporting body for supporting the superconductive coil from the vacuum chamber and securing the superconductive coil, a second cold part of a multi-stage refrigerator for cooling a heat exchanger to condense evaporated helium gas, and a first cold part of the multi-stage refrigerator for cooling the heat shield, wherein a magnetic shield is provided from the first cold part of the multi-stage refrigerator to an outer periphery of the second cold part of the multi-stage refrigerator.Type: ApplicationFiled: June 29, 2006Publication date: January 4, 2007Inventors: Takeo Nemoto, Ryuya Ando, Hiroyuki Watanabe
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Publication number: 20070001793Abstract: A device for preventing the explosion of an electric transformer equipped with a tank filled with combustible coolant fluid, includes a pressure relief element to decompress the tank, a reservoir arranged downstream of the pressure relief element and at least one stopper valve on the reservoir such that the reservoir is hermetic in order to collect a fluid that passes through the pressure relief element.Type: ApplicationFiled: June 22, 2006Publication date: January 4, 2007
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Publication number: 20070001794Abstract: A digital subscriber line (DSL) modem (12, 14) comprising a line interface transformer (22) having a primary circuit for coupling to a transmission line and a secondary circuit for outputting a signal transmitted over said transmission line, each circuit being formed of a continuous electrically conductive material and in which the primary circuit and the secondary circuit are substantially parallel and are in substantially the same plane.Type: ApplicationFiled: September 16, 2004Publication date: January 4, 2007Inventors: Neil Alford, Ener Salinas Flores, Stavros Dimitriou
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Publication number: 20070001795Abstract: An inductor comprising one or more windings disposed on opposed first and second surfaces of a flat-plate substrate. The windings are applied to the substrate by plating or photoresistive deposition techniques, with through-holes through the plate accommodating the windings from opposed surfaces. Windings of more than one layer are obtainable with insulation between adjacent layers. The resulting inductor is usable, for example, as a component of an EMI filter in a power converter circuit.Type: ApplicationFiled: July 1, 2005Publication date: January 4, 2007Inventors: Randy Brandt, H. Turner
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Publication number: 20070001796Abstract: Printed Circuit Board with Integrated Inductor. In today's electronic devices components such as inductors are required having a small building height. According to the present invention, a core of an inductor may be realized by ferrite plates glued onto a substrate. A winding of the inductor is provided in the substrate. Advantageously, this may allow to provide an inductor having a simple arrangement and a reduced building height.Type: ApplicationFiled: August 24, 2004Publication date: January 4, 2007Inventors: Eberhardt Waffenschmidt, Bernd Ackermann, Henricus Derckx, Wilheimus Lier
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Publication number: 20070001797Abstract: A switch includes a body and a switch member is pivotably engaged with the top opening of the body. A link has one end pivotably connected to a first end of the switch member and the other end of the link is movably received in a guide path is defined in the body. A bi-metallic contact plate has a first end fixed to one of two terminals. A contact portion splits from the contact plate and a first contact point is connected to an underside of the contact portion. A second contact point is connected to the other terminal. A free end of the contact portion is connected with a free fist end of a spring member and a second end of the spring member is connected to the contact plate.Type: ApplicationFiled: July 2, 2005Publication date: January 4, 2007Inventor: Tsung-Mou Yu
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Publication number: 20070001798Abstract: A switch device includes a body with a switch member pivotably engaged with a top opening of the body and a first terminal and a second terminal respectively extend through a bottom of the body. A bimetallic plate has a first end fixed to the first terminal and includes a first contact point which is located above a second contact point on the second terminal. A link has an upper end pivotably connected with a protrusion on an underside of the switch member and a lower end of the link clamps the second end of the bimetallic plate. The protrusion includes an engaging hole and an extension slot is in communication with the engaging hole. The upper end of the link has a biasing plate which contacts a contact portion in the body so as to provide a potential force to keep the link upright. When overload, the bimetallic plate is deformed upward and the upper end of the link is moved into the extension slot to ensure that the bimetallic plate is deformed completely.Type: ApplicationFiled: July 2, 2005Publication date: January 4, 2007Inventor: Tsung-Mou Yu
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Publication number: 20070001799Abstract: A simple and low-cost electronic function relay is specified, for example an overload relay with a bistable printed circuit board relay module. The relay includes an engagement point for mechanical operation. The relay further includes a separate reset mechanism, which can be coupled to the printed circuit board relay module, and a switching lever, which corresponds with the engagement point, for manual resetting of the printed circuit board relay module to a switched-on position.Type: ApplicationFiled: June 16, 2006Publication date: January 4, 2007Inventors: Siegfried Neumann, Fritz Royer, Uwe Weiss, Christian Widmann
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Publication number: 20070001800Abstract: A chip variable resistor which is capable of keeping the resistance at an adjusted value and can be manufactured easily is provided. An insulating substrate is formed with a through-hole capable of receiving a driver, and the upper surface of the insulating substrate is formed with a resistor film surrounding the through-hole. A rotor in the form of a circular plate overlaps the resistor film via a spacer made of an insulating material. The rotor is pressed and held from the outside by a holder made of a metal plate. The spacer is partially cut away so that a contact portion of the rotor is exposed downward for coming into contact with the resistor film. Since the holder surrounds the rotor from the outside, the resilient force of the holder can strongly act on the rotor. Therefore, the resistance can be reliably kept at the adjusted value.Type: ApplicationFiled: May 7, 2004Publication date: January 4, 2007Applicant: ROHM CO., LTD.Inventor: Shigeru Kambara