Abstract: Systems are provided for producing a low frequency filter pole. A first bond pad is coupled to a power source. A second bond pad is inductively connected to the first bond pad by a first bond wire. A capacitor is connected to the second bond pad. A third bond pad is inductively connected to the second bond pad by a second bond wire. The second bond wire, in conjunction with the capacitor, forms a low frequency filter pole to mitigate noise in a regulated signal provided at the third bond pad.

Abstract: A digital apparatus having a cable comprising a plurality of high-speed and low-speed signal carrying conductors, the conductors carrying the low-speed signals are bypassed to a signal ground with selected values of capacitance so as to become virtual signal ground return conductors for the high-speed signal conductors. The selected values of capacitance have a lower impedance then the characteristic impedance of the conductors in the cable. The cable may be a multi conductor cable, a ribbon cable, a flex cable, a twisted pair cable, etc. In a similar fashion, signal conductors on a printed circuit board, not having a separate ground plane layer, may create virtual signal ground returns from the low-speed signal carrying conductors that are proximate to the high-speed signal carrying conductors for reduction of radiated electromagnetic radio frequency interference.

Abstract: An AC coupling network has (a) a first pair of capacitances C1 connected between the input nodes and the output nodes and (b) a second pair of capacitances C2 cross-connected between the input nodes and the output nodes. The capacitances C1 and C2 are formed by sets of switched capacitors that can be configured to provide the network with different levels of attenuation while maintaining a constant AC coupling pole frequency. In particular, the sets of switched capacitors can be configured to ensure that C1+C2 remains constant, while C1?C2 varies. The present invention enables AC coupling to be implemented without using active devices such as operational amplifiers and/or buffers.

Abstract: A low-pass filter comprises a capacitor, first and second varistors, a resistor, and first to third external electrodes. The capacitor includes a dielectric body and first to third internal electrodes. The first internal electrode is connected to the third external electrode physically and electrically. The second internal electrode is connected to the second external electrode physically and electrically. At least a portion of the second internal electrode opposes the first internal electrode through at least a portion of the dielectric body. The third internal electrode is connected to the first external electrode physically and electrically. At least a portion of the third internal electrode opposes the first internal electrode through at least a portion of the dielectric body. The first varistor is connected in parallel to a capacitor constituted by the first and third internal electrodes. The second varistor is connected in parallel to a capacitor constituted by the first and second internal electrodes.

Abstract: A network comprises an arrangement of regular structures and merged structures, in which the regular structures each comprise one or more mutually identical fixed elements and an equal number of adjustable elements of equal value, and the adjustable elements each comprising two or more adjustable units. The regular structures may comprise one or more mutually identical fixed elements and an equal number of adjustable elements of equal value. The adjustable elements each comprise two or more adjustable units, and the merged structures comprise N mutually identical fixed elements and one merged adjustable element. The merged adjustable elements have substantially the same value as that of N adjustable elements, where N is an integer equal to or greater than 2, and the merged elements each may comprise one or more adjustable units. The network accordingly is trimmable in a manner that uses minimum area and consumes minimum time during manufacture.

Abstract: An electrical component includes a capacitive impedance and a shunt path inductance cancellation feature provided by coupled windings. A filter having a capacitor with capacitor-path inductance cancellation provides enhanced performance over frequency compared with conventional capacitors.

Abstract: In a variable matching circuit including an impedance device and a variable-capacitance capacitor, the variable-capacitance capacitor is formed in a manner that a plurality of variable-capacitance devices using thin film dielectric layers whose dielectric constants change depending on applied voltages are connected to each other in parallel regarding a direct current and connected to each other in series regarding a high frequency, between an input terminal and an output terminal. The variable matching circuit can be realized that can make the maximum use of the rate of a capacitance change of the variable-capacitance capacitor by a bias signal and make an impedance matching, that exhibits small waveform distortion and intermodulation distortion, and that is excellent in electric high power handling capability and low-loss even at a high frequency.

Abstract: A radio-frequency impedance device includes a resistor device mounted on a surface of a dielectric layer, and adapted to be connected between a transmission line and an output terminal associated with a load impedance. A ground conductor may extend opposite a portion of the resistor device. Further, a conductor assembly may couple a first end of the resistor device to a transmission line. The conductor assembly may include a first portion extending along the first layer face on opposite sides of the resistor device adjacent to at least the first resistor end, or a second portion extending along the fourth layer face opposite from the ground conductor. The configuration of devices may produce, in operation, an electric field distributed along the resistor device, providing corresponding distributed current density along the resistor device over a broad frequency band.

Abstract: Disclosed are systems and methods which provide phase shifting of signals while minimizing signal attenuation associated with providing such phase shifting. Preferred embodiments provide a compact polyphase filter structure in which the geometry of the polyphase filter both minimizes parasitic capacitance and signal transmission paths therein. A polyphase filter of a preferred embodiment utilizes a radial pinwheel structure providing a geometry in which successive circuit components are disposed very near one another and in an orientation to accommodate very short connections therebetween. Embodiments may include the use of a buffer at the outputs of the polyphase filter circuit to reduce the amount of parasitics associated with the polyphase filter.

Abstract: A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first inductor bank is selected to filter a first band of frequencies, and a second inductor bank is selected to filter a second band of frequencies. A switch circuit couples the input signal to either the first inductor bank or the second inductor bank. The switch circuit selects the first inductor bank if the first band of frequencies is selected, and selects the second inductor bank if the second band of frequencies is selected. The switch circuit electrically isolates the switching of the input signal to the first and the second inductor banks, so as to enhance the Q factor of the LC filter. Circuit and techniques are disclosed to reduce parasitic capacitance in a capacitive bank that employs MOS transistors.

Abstract: An RF choke for minimizing hum modulation in a coaxial cable system that carries broadband signals along with high amperage 60 Hz AC power signals. The choke contains two conductors wound about a rod core. The first conductor includes two groups of clockwise windings each containing three turns. The second conductor wound counterclockwise also contains two groups of winding one of which contains four turns and the other of which contains three turns. The two connectors are separated by a space of about 0.20? and a 750 ohm resistor is placed in parallel over the second group of winding in the first conductor and a second 510 ohm resistor is placed in parallel over the first group of windings in the second conductor.

Abstract: In a variable matching circuit including an impedance device and a variable-capacitance capacitor, the variable-capacitance capacitor is formed in a manner that a plurality of variable-capacitance devices using thin film dielectric layers whose dielectric constants change depending on applied voltages are connected to each other in parallel regarding a direct current and connected to each other in series regarding a high frequency, between an input terminal and an output terminal. The variable matching circuit can be realized that can make the maximum use of the rate of a capacitance change of the variable-capacitance capacitor by a bias signal and make an impedance matching, that exhibits small waveform distortion and intermodulation distortion, and that is excellent in electric high power handling capability and low-loss even at a high frequency.

Abstract: A direct-down conversion receiver may include a transconductance-capacitor (GmC) filter to filter undesirable mixing products and provide a filtered baseband-differential signal. The GmC filter may include first and second transconductance-capacitor (GmC) circuits in series and a transconductance-feedback circuit in feedback with the second transconductance-capacitor circuit. The GmC circuits may comprise cross-coupled pairs of transistors to receive a baseband-differential signal and generate a differential output current. The GmC circuits may also comprise MOSCAPs coupled respectively between the differential inputs of the GmC circuit and internal-feedback nodes. In some embodiments, a substantially-constant bias voltage may be maintained across the voltage-dependent capacitors to allow the voltage-dependent capacitors to provide a substantially constant capacitance.

Abstract: A circuit includes a transmission line transformer coupled between an input and output port. An inductor may be selectively coupled into the ground return path of the transmission line transformer to alter the impedance transformation provided between the input and output ports.

Abstract: An on-chip loop filter includes a 1st resistor, a 1st capacitor, a 2nd capacitor, a 3rd capacitor, a 2nd resistor, and a 4th capacitor. The 1st resistor is operably coupled to receive a charge pump output. The 1st capacitor is coupled in series with the 1st resistor where the second node of the 1st capacitor is coupled to a return. The 2nd capacitor is coupled in parallel with the series combination of the 1st resistor and 1st capacitor. The 3rd capacitor is coupled in parallel with the 2nd capacitor. The 2nd resistor is coupled to a node of the 3rd capacitor and to a node of the 4th capacitor. The other node of the 4th capacitor is coupled to ground.

Abstract: The transmission line is provided with a signal strip, a resistive layer opposed to the signal strip across a dielectric layer, and a ground conductor electrically connected to the resistive layer, wherein, in the case where resistance per unit length occurring when a high frequency current induced in the resistive layer through capacitance formed by the dielectric layer between the signal strip and the resistive layer flows in the resistive layer and between the resistive layer and the ground conductor at the time of transmission of a high frequency signal of a predetermine frequency through the signal strip is defined as additional resistance and resistance per unit length occurring when the high frequency current flows through the ground conductor is defined as ground resistance, the additional resistance is larger than the ground resistance.

Abstract: First, second, third, and fourth resistors are coupled to first, second, third, and fourth capacitors. A first positive in-phase terminal is coupled to the first resistor and the first capacitor. A first negative in-phase terminal is coupled to the fourth resistor and the fourth capacitor. A positive quadrature-phase terminal is coupled to the second resistor and the first capacitor. A second positive in-phase terminal is coupled to the first resistor and the second capacitor. A second negative in-phase terminal is coupled to the fourth resistor and the third capacitor. A negative quadrature-phase terminal is coupled to the third resistor and the fourth capacitor. The first and fourth resistors, the second and third resistors, the first and fourth capacitors, and the second and third capacitors are equal distances from and on a same side of respective axes, and are equal distances from and on opposite sides of a symmetry axis.

Abstract: An isolator, such as a common-mode-reactor, and power-conditioner network is utilized to provide at least one of adequate segment impedance, cross-talk or adequate high-frequency-interference attenuation on, or between, participating segments. The participating segments comprise adequate power conditioning, and are supplied by an isolated or non-isolated common power supply. At least one of the segments may have one of two poles in resistive and/or capacitive and/or inductive contact to ground, as well as having one of the segments, in resistive and/or capacitive and/or inductive contact to another of one of two poles of other segments.

Abstract: A circuit for correcting the offset of an amplification and filtering chain having a predetermined gain and cut-off frequency depending on the value of at least one capacitor, comprising: a correction means for subtracting from the chain input a correction signal depending on the value of a programmable digital word; a digital automaton for, in a setting phase, searching, then memorizing one of two consecutive values of the digital word between which the output signal of the chain switches sign, the input signal being canceled during a setting phase; and comprising a means for, during the setting phase, reducing the value of said at least one capacitor with respect to its normal operating value.

Abstract: An impedance matching wave filter includes an original wave filter and a match circuit. The match circuit is connected in parallel with the original wave filter and is able to be varied to produce impedance matching with the original wave filter in order to improve the condition of the return loss and to lower signal fading and signal distortion.

Abstract: A noise filter of the present invention includes an inductor and a resistor connected in parallel with each other. A power supply frequency current does not pass the resistor but passes through the inductor with no loss. On the other hand, a high frequency noise current including a resonance frequency current, does not pass the inductor but is dissipated at the resistor. Therefore, the noise filter does not charge noise power and so does not suffer from a problem due to power discharging. The resonance frequency current caused by the noise filter and the earth capacitance is also dissipated at the resistor. Therefore, no problem is caused by the resonance frequency current.

Abstract: There is disclosed a variable capacitance circuit which comprises: first to Nth variable capacitance elements C1-CN (N is an odd number) sequentially connected in series between an input terminal I and an output terminal O, whose capacitances change depending on voltage applied thereto; an ith bias line on the input terminal side provided between an input terminal portion of the first variable capacitance element and a connection point between a 2ith variable capacitance element and a (2i+1)th variable capacitance element; and an ith bias line on the output terminal side provided between an output terminal portion of the Nth variable capacitance element and a connection point between a (2i?1)th variable capacitance element and the 2ith variable capacitance element, where N and i are integers satisfying N=2n+1, n?1, 1?i?n.

Abstract: Disclosed is apparatus for operating with an RC filter (26, 26A), and a corresponding method. The apparatus includes circuitry (32) for use in measuring an actual value of at least one filter component and a controller (34), coupled to the measurement circuitry, for determining at least one adaptive filter (36, 46) coefficient using the measured actual value to so as to compensate for a deviation of at least one filter component value from an ideal value. Where the filter is embodied as an RC network, the circuitry measures an actual value of both a resistor and a capacitor, and the controller uses the measured actual value of the capacitor when determining the value of a resistor.

Abstract: A constant impedance filter maintains a constant input impedance for frequencies that are both inside the filter passband and outside the filter passband. The constant input impedance appears as a pure resistance. The constant impedance filter includes a plurality of filter poles that are connected in series. Each of the filter poles include an inductor, a capacitor, and a resistor. The value of the inductor, the capacitor, and the resistor are selected to provide a constant input impedance over frequency for each pole of the filter, which produces a constant input impedance for the entire filter over frequency. The constant impedance filter can be implemented as a low pass filter, a high pass filter, or a bandpass filter. Furthermore, the constant impedance filter can be implemented in a single-ended configuration or a differential configuration.

Abstract: The transmission line is provided with a signal strip, a resistive layer opposed to the signal strip across a dielectric layer, and a ground conductor electrically connected to the resistive layer, wherein, in the case where resistance per unit length occurring when a high frequency current induced in the resistive layer through capacitance formed by the dielectric layer between the signal strip and the resistive layer flows in the resistive layer and between the resistive layer and the ground conductor at the time of transmission of a high frequency signal of a predetermine frequency through the signal strip is defined as additional resistance and resistance per unit length occurring when the high frequency current flows through the ground conductor is defined as ground resistance, the additional resistance is larger than the ground resistance.

Abstract: An electrical component includes a capacitive impedance and a shunt path inductance cancellation feature provided by coupled windings. A filter having a capacitor with capacitor-path inductance cancellation provides enhanced performance over frequency compared with conventional capacitors.

Abstract: An integrated RF filter for use at microwave frequencies comprising: an integrated circuit inductor with connected integrated circuit capacitors, arranged as a tank circuit, and an integrated circuit shunt resistor; the inductor, capacitors and resistor being interconnected in a bridge-T filter arrangement.

Abstract: A distributed capacitive/resistive electronic device. An electronic device is described which includes a dielectric substrate, a first resistive component, a second resistive component, and a connecting component. The first resistive component is affixed to a first side of the dielectric substrate. The second resistive component is affixed to a second side of the dielectric substrate, wherein the second side is oppositely located from the first side. The connecting component is affixed to the dielectric substrate, wherein the connecting component electrically connects the first resistive component to the second resistive component, wherein the connecting component is electrically connectable to other electronic circuitry, and wherein, at a location removed from the connecting component, the second resistive component is electrically connectable to other electronic circuitry.

Abstract: The invention includes an integrated adjustable resistor. The integrated adjustable resistor includes a first electrode, a second electrode, and a phase change medium electrically connected to the first electrode and the second electrode. The integrated adjustable resistor further includes an adjustable pulse generator for applying a variable amount of energy to the phase change medium. A resistance of the phase change medium is continuously dependent upon the amount of energy applied to the phase change medium. A resistance dependent circuit is electrically connected to the first electrode and the second electrode. Operation of the resistance dependent circuit is continuously dependent upon the resistance of the phase change medium.

Abstract: In a low-pass filter which is preferably used as a loop filter in a PLL or DLL, filter characteristics which are the same as those of a conventional low-pass filter are realized without causing collateral problems, such as an increase in the circuit area, the circuit complexity, or the resistance value, which may be caused due to size reduction of a capacitive element in the conventional low-pass filter. Thus, in a loop filter including a capacitive element and a resistive element which are connected in series, the first input terminal is provided at the side including the resistive element, and the second input terminal is provided at a connection point of the capacitive element and the resistive element. The first input terminal is supplied with the first electric current.

Abstract: A transmission line filter having low reflectivity and Gaussian characteristics includes at least one inductive element aligned along the transmission line and at least one shunt configuration branching off the transmission line including a capacitive element and a resistive element. The transmission line filter is embodied in complete and incomplete Gaussian filters, and in both lumped element and distributed-element configurations. A method of designing a transmission line filter having low reflectivity and Gaussian characteristics is provided in which values for desired filter parameters are ascertained, formulas for the values of the inductive, capacitive and resistive elements are derived in terms of the desired filter parameters and the number of half-cells, a number of half-cells for the filter required to achieve the desired filter parameters is selected, and lumped element values for the inductive, capacitive, and resistive elements are estimated using the selected number of half-cells.

Abstract: A noise filter 10 of the present invention includes an inductor 71 and a resistor 11 connected in parallel with each other. A power supply frequency current bypasses the resistor 11 but passes through the inductor 71. A high frequency noise current including a resonance frequency current, on the other hand, bypasses the inductor 71 but is dissipated at the resistor 11. Therefore, the noise filter 10 does not accumulate noise power and so does not suffer from a problem due to power releasing. The resonance frequency current caused by combination of inductance of the inductance and earth capacitance in the noise filter 10 is also dissipated at the resistor 11, thus giving rise to no problem of its own.

Abstract: A control system for the characteristic parameters of an active filter includes: a system for the determination of the technological distribution of the components that provides the information related to said technological distribution of the components; an elaboration system for said information related to said technological distribution of the components; an active filter including at least two programmable passive circuital elements receiving said information related to said technological distribution of the components; said elaboration system, being aware of the topology for said active filter, comprises means for determining the value for said at least two programmable passive circuital elements; means for correcting the value for said at least two programmable passive circuital elements according to the value of the information related to said technological distribution of the components; means for determining the programming values for said at least two programmable passive circuital elements.

Abstract: A circuit substrate includes resistive films are disposed on the surfaces of lands included in a circuit pattern and these resistive films are used as resistances connected in series to a capacitor. Therefore, the resistances are connected in series without increasing the inductance in the capacitor, and accordingly, a circuit having a small impedance variation with respect to frequency can be obtained. Therefore, it is possible to obtain a power supply circuit and so forth having stable operation and fast response.

Abstract: A flat group-delay low-pass filter includes a series element connected between an input terminal and an output terminal, and a shunt element with one end thereof grounded. Inductors define the series element, a parallel circuit including a capacitor and a series circuit including a resistor and a capacitor defines the shunt element. The flat group-delay low-pass filter thus eliminates the need for inserting a fixed attenuator to control the effect of reflections due to impedance mismatching between the filter and other components. The resulting flat group-delay low-pass filter and an optical signal receiver including the filter have very low manufacturing costs and component costs.

Abstract: A filter is formed as an integrated circuit by resistive and capacitive elements and includes, for connection to ground, at least two separate pads of a chip designed to be connected individually to at least two separate terminals of a package.

Abstract: The invention relates to a tuning circuit for tuning a filter stage, which has an RC element (1) with an RC time constant (&tgr;), with the RC time constant (&tgr;) being the product of the resistance of a resistor (R1) in the RC element (1) and the capacitance of a capacitor (C1), which is connected in series with the resistor (R1), in the RC element (1), having a comparator (10) for comparison of the voltage which is produced at the potential node (4) between the resistor (R1) and the capacitor (C1), with a reference ground voltage; and having a controller (15) which varies the charge on the capacitor (C1) in the RC element (1) until the comparator (10) indicates that the voltage which is produced at the potential node (4) is equal to the reference ground voltage, with the controller (15) switching a capacitor array (26) as a function of the charge variation time, which capacitor array (26) is connected in parallel with the capacitor (C1) in the RC element (1), in order to compensate for any discrepancy bet

Abstract: A filter circuit directed primarily to use in the CATV industry includes at least one frequency dependent component, such as an RF choke, capacitor or inductor, for attenuating signals over at least a portion of the frequency range of signals which pass through the filter. In a typical application, signals are transmitted and received in both forward and return paths at each end of a multi-channel, two-way communication system. Signals in the frequency range of the return path, or of both paths, are attenuated by a desired amount, which is essentially constant over the frequency range of attenuation. In any case, the circuit component providing the attenuation is frequency dependent, thus providing a number of advantages, such as reducing the number of circuit components, reducing filter size and cost, and/or increasing the filter's electric surge and power handling capabilities.

Abstract: There is disclosed a variable capacitance circuit which comprises: first to Nth variable capacitance elements C1-CN (N is an odd number) sequentially connected in series between an input terminal I and an output terminal O, whose capacitances change depending on voltage applied thereto; an ith bias line on the input terminal side provided between an input terminal portion of the first variable capacitance element and a connection point between a 2ith variable capacitance element and a (2i+1)th variable capacitance element; and an ith bias line on the output terminal side provided between an output terminal portion of the Nth variable capacitance element and a connection point between a (2i−1)th variable capacitance element and the 2ith variable capacitance element, where N and i are integers satisfying N=2n+1, n≧1, 1≦i≦n.

Abstract: An integrated circuit having a substrate and an LC tank circuit comprises an inductor with parallel capacitors. The capacitors include triple plate integrated capacitors having a highest metal plate, a common middle plate and a lowest metal plate. The lowest plate is connected to a virtual ground node. A control circuit element connected to the middle plate allows the resonant frequency of the tank circuit to be controlled.

Abstract: A receiver circuit that can obtain a reception signal with accuracy in high-speed communications using two-wire transmission lines. The receiver circuit receives information signals in a communication system with two-wire transmission lines for transmitting the information signals in opposite phases to each other. The receiver circuit includes an alternating-current coupling arrangement provided for each of the two-wire transmission lines and for extracting alternating-current components of the information signals inputted through the transmission lines. The receiver circuit also includes a reception signal generating arrangement for obtaining a reception signal corresponding to the information signals in accordance with output signals from each of the alternating-current coupling arrangements. Each of the alternating-current coupling arrangements include two time constant circuits having time constants different from each other and connected in parallel to each other between an input and output thereof.

Abstract: A transmission line structure comprises a plurality of conductive lines over an insulating layer. With three conductive lines, a center conductive line is disposed between the outer conductive lines to define a gap distance therebetween that is less than their height. In a further aspect, a conductive layer (e.g., a ground plane) contacts the insulating layer on a side thereof opposite the plurality of conductive lines. A ratio for the height of the conductive lines relative to the distance therebetween is kept greater than another ratio for the width of the center conductor relative to the thickness of the insulating layer.

Abstract: A functional circuit and a filter are disposed between a first power supply wire capable of being set in a first electric potential of a semiconductor device and a second power supply wire capable of being set in a second electric potential, which is different from the first electric potential. The functional circuit is connected to the first power supply wire or the second power supply wire. Then, the filter transmits a signal inputted or outputted between the outside of the semiconductor device and the functional circuit.

Abstract: An LC filter circuit includes first and second LC-trap capacitor conductors, respectively, that are opposed to third and LC-trap capacitor conductors with an insulating sheet therebetween to define first and second LC trap capacitors, respctively. A portion of a first LC resonator inductor and the first LC trap capacitor define an input-side LC trap circuit, and a portion of a second LC resonator inductor and the second LC trap capacitor define an output-side LC trap circuit.

Abstract: A first operational amplifier receives a reference voltage at one input terminal, a first transistor is connected between a first power source line and the first operational amplifier, a second transistor is connected between the first power source line and the first operational amplifier, a resistor is connected between the first transistor and a second power source line, a first switch is connected to the second transistor, a variable capacitor connected between the first switch and the second power source line, a second switch is connected the variable capacitor and the second power source line, a second operational amplifier is connected to the variable capacitor and the reference voltage, a third switch is connected to the second transistor, a load is connected between the third switch and the second power source line, and a control circuit is connected to the first to third switches.

Abstract: The adaptive filter can be realized with a very low circuitry outlay, as a result of which the adaptive filter for the first time becomes practical for many applications. In particular, the area required by the filter is small since the large time constants that are necessary for many applications can be realized in a simple manner by the control circuit. The adaptive filter is suitable in particular for “mixed signal ASICS”, in which the required preconditions for the control circuit are already present, so that the control circuit can be realized just by means of corresponding wiring.

Abstract: A lumped filter includes an input terminal, an output terminal, and a ground electrode disposed on a dielectric film on an alumina substrate. A first spiral inductor is connected between the input terminal and the ground electrode. A second spiral inductor is connected between the output terminal and the ground electrode. MIM capacitors are inserted between the input terminal and the first spiral inductor, and between the output terminal and the second spiral inductor. A third spiral inductor is inserted between the first and second spiral inductors. The spiral inductors have self-inductance, and capacitance between the spiral inductors and the electrodes adjacent thereto, by which the spiral inductors self-resonate and define as parallel LC resonators.

Abstract: A method for achieving a desired value of electrical impedance between conductors of an electrical power distribution structure by electrically coupling multiple bypass capacitors and corresponding electrical resistance elements in series between the conductors. The resistance elements may be annular resistors, and may provide the designer a greater degree of control of the system ESR. The annular resistors may comprise a first terminal, an annular resistor, and a second terminal. The second terminal may be located within the confines of the annular resistor. The annular resistors may be printed onto a conductive plane (e.g. a power plane or a ground plane), or may be a discrete component.

Abstract: A distributed capacitive/resistive electronic device. An electronic device is described which includes a dielectric substrate, a first resistive component, a second resistive component, and a connecting component. The first resistive component is affixed to a first side of the dielectric substrate. The second resistive component is affixed to a second side of the dielectric substrate, wherein the second side is oppositely located from the first side. The connecting component is affixed to the dielectric substrate, wherein the connecting component electrically connects the first resistive component to the second resistive component, wherein the connecting component is electrically connectable to other electronic circuitry, and wherein, at a location removed from the connecting component, the second resistive component is electrically connectable to other electronic circuitry.

Abstract: A duplexer structure for allowing an RF transmitter and an RF receiver to share a common antenna includes impedance matching circuitry to match the receiver input impedance to the antenna impedance during a receive operation and impedance transformation circuitry to transform the antenna impedance to a lower impedance at the receiver input terminals during a transmit operation. The impedance matching circuitry and the impedance transformation circuitry of the duplexer share one or more passive components, thus reducing the overall number of components required to implement the duplexer. This reduction in component count reduces the amount of chip area required to implement the duplexer and increases the ease with which the RF transceiver is integrated onto a semiconductor chip. In one embodiment, the duplexer uses a differential topology to provide common mode noise rejection and even harmonic distortion cancellation within a transceiver.