Patents Assigned to MONOLITH INC.
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Patent number: 6803252Abstract: Methods and apparatus for providing connection packages for high-speed integrated circuits (“ICs”) in optical, electronic, wired or wireless communications are disclosed. The connection package achieves dimensional transformation of signal routes from high-speed, high-density IC's input/output pads to the external terminals such as coaxial terminals and BGA balls, while maintaining constant characteristic impedance throughout the transmission lines. A package may include a substrate having microstrips for communicating signals between the IC pads and external terminals. A pair of differential microstrips can be positioned closer to each other near the IC pads and create capacitive coupling. Such coupled capacitance allows the width of the microstrips to be reduced.Type: GrantFiled: November 21, 2001Date of Patent: October 12, 2004Assignee: Sierra Monolithics, Inc.Inventors: Binneg Y. Lao, William W. Chen, David A. Rowe, Inho Kim
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Publication number: 20040136411Abstract: High-speed, high-performance, low-power transponders, serializers and deserializers are disclosed. A transponder may include a transmitter and a receiver. A serializer may include (i) a serdes framer interface (SFI) circuit for receiving data channels and a reference channel from a framer and realigning the data channels, (ii) a clock multiplier unit (CMU) for receiving a clock frequency and translating the clock frequency to a higher-clock frequency, (iii) a multiplexing circuit for merging data channels into one data channel, (iv) an output driver stage, (v) a reference selection circuit for selecting a reference clock, filtering the reference clock, and providing to the CMU one of the selected reference clock or a filtered reference clock.Type: ApplicationFiled: January 10, 2003Publication date: July 15, 2004Applicant: Sierra Monolithics, Inc.Inventors: Craig A. Hornbuckle, David A. Rowe, Thomas W. Krawczyk, Samuel A. Steidl, Inho Kim
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Patent number: 6744325Abstract: A quadrature ring oscillator for high clock-rate applications is disclosed. A quadrature LC ring oscillator may use two stages of LC oscillators and variable mixers to provide consistent oscillation even at high clock rates. One stage of the quadrature ring oscillator comprises a first resonating element having an input and an output, and a first variable summer having L and P inputs and an output, with its L input being connected to the output of the first resonating element. The output of the first variable summer is connected to the input of the first resonating element The first variable summer may generate its output at a first phase by combining the L and P inputs. A second stage of the LC ring oscillator comprises a second resonating element, which has an input and an output, with its output being connected to the P input of the first variable summer. An inverter is used to produce an inverted signal of the output of the first resonating element.Type: GrantFiled: April 3, 2002Date of Patent: June 1, 2004Assignee: Sierra Monolithics, Inc.Inventors: Thomas W. Krawczyk, Jr., David A. Rowe
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Ultra-wideband power amplifier module apparatus and method for optical and electronic communications
Patent number: 6639461Abstract: A broadband power amplifier module for high bit-rate SONET/SDH transmission channels, such as OC-192 and OC-768 applications. The power amplifier module, or also frequently referred to as modulator driver module, comprises amplifiers connected in series to amplify an input signal. A bias tee circuit is incorporated into the power amplifier module by connecting a conical shape inductor between the output stage of the amplifiers and the supply voltage and connecting a pair of blocking capacitors also at the output stage of the amplifiers. The conical shape inductor is adapted to provide high impedance over the entire bandwidth. The capacitors are adapted to provide high self-resonant frequency that is approaching or exceeding the bandwidth frequency. A power detection circuit can also be incorporated into the power amplifier module at the output stage of the amplifiers. The power detection circuit has a voltage divider circuit connected between the output stage and a ground supply.Type: GrantFiled: August 30, 2001Date of Patent: October 28, 2003Assignee: Sierra Monolithics, Inc.Inventors: Alan K. Tam, Binneg Y. Lao -
Patent number: 6552621Abstract: There is disclosed a SAW resonator-based oscillator circuit having low phase noise that is tunable across a comparatively wide frequency range. The oscillator circuit comprises: 1) a tuning element coupled to the input port and having a variable capacitance responsive to the frequency tuning signal; 2) a first inductor coupled in series with the tuning element; 3) a SAW resonator coupled in series with first inductor; 4) a second inductor coupled in parallel with the SAW resonator; 5) a negative resistance generating circuit coupled to the SAW resonator. Across the tunable operating frequency range of the oscillator circuit, the reactance looking into the input port is maintained at approximately zero and the resistance looking into the input port remains negative.Type: GrantFiled: April 6, 2001Date of Patent: April 22, 2003Assignee: RF Monolithics, Inc.Inventor: Alan R. Northam
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Patent number: 6509801Abstract: Methods and apparatus for generating clock signals accurately locked to multi-gigabits-per-second data signals received over fiber optic channels are disclosed. The invention includes a phase detector for comparing a data signal and a clock signal, a one shot unit for detecting a data transition, an XOR, a filter, a main charge pump, a compensating charge pump for producing additive or compensating current, and a VCO for generating the clock signal. The phase detector includes multiple D-flip flops. The one shot unit includes a delay unit and an AND gate. The filter includes a resistor, a capacitor and a negative resistance amplifier. The main charge pump includes differential inputs, double outputs, cross-quading resistors, differential NPN input transistors, and a current source. The compensating charge pump includes differential NPN input transistors and a current source.Type: GrantFiled: June 29, 2001Date of Patent: January 21, 2003Assignee: Sierra Monolithics, Inc.Inventors: Binneg Y. Lao, David A. Rowe, James R. Pulver
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Patent number: 6352195Abstract: A method of attaching a lid with at least a metallic surface thereon to a substrate to enclose a surface acoustic wave electronic circuit using a fluxless solder preform having an undesired oxide surface and associated with the metallic surface on the lid and in superimposed and abutting relationship with a gold seal ring surrounding the electronic circuit to form a unit that is heated in a furnace having a hydrogen atmosphere such that the hydrogen removes any undesired oxide surfaces from the solder preform and the metallic surface on the lid by combining with the oxygen therein to form moisture so as to remove any oxide surfaces from the solder preform and the lid metallic surface and enable a complete bonding of the fluxless solder preform with the gold seal ring and the lid metallic surface thereby forming a hermetically sealed package.Type: GrantFiled: September 18, 2000Date of Patent: March 5, 2002Assignee: RF Monolithics, Inc.Inventors: Frank E. Guthrie, Paul O. Johnson
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Patent number: 6239664Abstract: There is disclosed a SAW resonator-based oscillator circuit having low phase noise that is tunable across a comparatively wide frequency range. The oscillator circuit comprises: 1) a tuning element coupled to the input port and having a variable capacitance responsive to the frequency tuning signal; 2) a first inductor coupled in series with the tuning element; 3) a SAW resonator coupled in series with first inductor; 4) a second inductor coupled in parallel with the SAW resonator; 5) a negative resistance generating circuit coupled to the SAW resonator. Across the tunable operating frequency range of the oscillator circuit, the reactance looking into the input port is maintained at approximately zero and the resistance looking into the input port remains negative.Type: GrantFiled: March 5, 1999Date of Patent: May 29, 2001Assignee: RF Monolithics, Inc.Inventor: Alan R. Northam
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Patent number: 6119920Abstract: A method of attaching a lid with at least a metallic surface thereon to a substrate to enclose a surface acoustic wave electronic circuit using a fluxless solder preform having an undesired oxide surface and associated with the metallic surface on the lid and in superimposed and abutting relationship with a gold seal ring surrounding the electronic circuit to form a unit that is heated in a furnace having a hydrogen atmosphere such that the hydrogen removes any undesired oxide surfaces from the solder preform and the metallic surface on the lid by combining with the oxygen therein to form moisture so as to remove any oxide surfaces from the solder preform and the lid metallic surface and enable a complete bonding of the fluxless solder preform with the gold seal ring and the lid metallic surface thereby forming a hermetically sealed package.Type: GrantFiled: December 20, 1996Date of Patent: September 19, 2000Assignee: RF Monolithics, Inc.Inventors: Frank E. Guthrie, Paul O. Johnson
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Patent number: 5793146Abstract: An improved surface acoustic wave device that utilizes M electrodes per each N transduction length(s) of a transducer that produces a desired net internal distributed reflectivity in both magnitude and phase. Two of the transducers can be made placed on a single substrate and be unidirectional and caused to radiate towards each other to form a filter. A resonator, a delay line, or the like can also be formed.Type: GrantFiled: April 20, 1995Date of Patent: August 11, 1998Assignee: RF Monolithics, Inc.Inventor: Peter V. Wright
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Patent number: 5793261Abstract: A digitally-controlled SAW stabilized FSK oscillator circuit having an oscillator and a single-port SAW resonator with a predetermined circuit resonant frequency and being coupled to the oscillator for establishing a first oscillator output frequency, F.sub.SAW. A bipolar transistor has at least one predetermined shunt capacitance value, C, that is placed in electrical series with the single-port SAW resonator when the transistor is in the OFF state and a closed switch that replaces the capacitance when the transistor is in the ON state to cause the first frequency, F.sub.SAW, to be generated by the oscillator when the transistor is ON and to cause a second frequency, F.sub.2, to be generated by the oscillator when the transistor is in the OFF state.Type: GrantFiled: April 10, 1997Date of Patent: August 11, 1998Assignee: RF Monolithics, Inc.Inventor: Harry O. Boling, III
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Patent number: 5789990Abstract: A crystal-controlled oscillator circuit is modified by the present invention by replacing the crystal with the first signal port of a two-port SAW resonator filter that has a low-loss primarily inductive characteristic and taking the oscillation output from the other port of the filter to provide an oscillator frequency with harmonics that are reduced significantly when compared to the output of a crystal-controlled oscillator.Type: GrantFiled: February 14, 1996Date of Patent: August 4, 1998Assignee: RF Monolithics, Inc.Inventors: Darrell L. Ash, Benjamin P. Abbott
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Patent number: 5787117Abstract: A transceiver including a receiver having a sequential amplifier that includes at least first and second RF amplifier stages coupled together by a delay line. A transmitter in the transceiver includes an oscillator for generating an RF carrier and the oscillator includes the delay line as a phase shifting element. A modulator is coupled to the oscillator for modulating the RF carrier either AM, OOK modulated, FM, FSK modulated, PM, and PSK modulated.Type: GrantFiled: January 26, 1996Date of Patent: July 28, 1998Assignee: RF Monolithics, Inc.Inventor: Darrell L. Ash
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Patent number: 5751197Abstract: A low-power, self-quenching superregenerative receiver utilizes a single-port SAW device coupled to an RF oscillator to establish the frequency of oscillation at the output of the RF oscillator. A diode detector is coupled from the oscillator output for detecting a predetermined amplitude of the oscillation output signal. A time-constant circuit is coupled from the signal detector for generating an oscillator quench signal when the oscillator signal is detected and the oscillator quench signal has a predetermined duration set by the time-constant circuit. A feedback circuit couples the oscillator quench signal to the RF oscillator to cause the RF oscillator to switch to a non-oscillating condition only during the predetermined duration of the RF oscillator quench signal. The RF oscillator then switches to the oscillating condition and the system repeats itself.Type: GrantFiled: June 18, 1996Date of Patent: May 12, 1998Assignee: RF Monolithics, Inc.Inventor: Harry O. Boling, III
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Patent number: 5721515Abstract: A high stability clock oscillator circuit that has no inductors in the oscillator circuit itself. In the preferred embodiment neither the collector, the base, nor the emitter of the transistor is grounded and the oscillator output is taken from the collector of the transistor. In an alternate embodiment the collector is AC grounded and the output is taken across a load resistor coupled between the emitter of the transistor and ground. The resulting oscillator is a high stability oscillator that can be used as a dock oscillator in high frequency circuits.Type: GrantFiled: August 29, 1996Date of Patent: February 24, 1998Assignee: RF Monolithics, Inc.Inventors: Alan R. Northan, Peter V. Wright
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Patent number: 5612706Abstract: A driven element is disposed on an antenna axis for transmission of electromagnetic energy in a transmission direction along the antenna axis. First and second parasitic arrays are disposed on opposite sides of the antenna axis in the transmission direction from the driven element. At least a portion of the antenna axis adjacent to the parasitic arrays is without parasitic elements. Each parasitic array has a plurality of parallel parasitic elements or directors spaced apart along a respective array line that includes a proximal portion adjacent to the driven element that extends in a general direction that is at an acute angle to the transmission direction. The first and second parasitic arrays are sufficiently close to the antenna axis to produce a radiation pattern that has a lobe with greatest magnitude in the transmission direction.Type: GrantFiled: December 1, 1995Date of Patent: March 18, 1997Assignee: Pacific Monolithics, Inc.Inventor: Allen F. Podell
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Patent number: 5545940Abstract: An acoustic wave device in which the propagation path of the surface acoustic wave device is folded to increase the wave propagation path length in order to make better use of the total chip space.Type: GrantFiled: November 7, 1994Date of Patent: August 13, 1996Assignee: RF Monolithics, Inc.Inventor: Peter V. Wright
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Patent number: D385563Type: GrantFiled: January 11, 1996Date of Patent: October 28, 1997Assignee: Pacific Monolithics, Inc.Inventor: Allen F. Podell
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Patent number: D391577Type: GrantFiled: July 12, 1996Date of Patent: March 3, 1998Assignee: Pacific Monolithics, Inc.Inventors: Todd G. Brehmer, Allen F. Podell
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Patent number: D403682Type: GrantFiled: February 11, 1997Date of Patent: January 5, 1999Assignee: Pacific Monolithics, Inc.Inventors: Todd G. Brehmer, John M. Wachsman