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| Number | Title | Issue Date |
| 7202749 | AC coupling technique for improved noise performance and simple biasing A low noise amplifier (LNA), which utilizes an AC coupling technique that can internally bias diodes in such a way as to provide effective low noise amplification, is provided. The low noise amplifier includes an input to an amplifier circuit, and an AC coupling cap... | 04/10/2007 |
| 7199669 | Dual gate cascade amplifier A dual gate cascade amplifier includes a first transistor and a second transistor electrically connected in series, the second transistor including a first parallel transistor and a second parallel transistor, the first parallel transistor and the second parallel tr... | 04/03/2007 |
| 7199670 | Use of a thick oxide device as a cascode for a thin oxide transconductance device in MOSFET technology and its application to a power amplifier design A power amplifier power amplifier includes a transconductance stage and a cascode stage. The transconductance stage that is operable to receive an input voltage signal and to produce an output current signal. The transconductance stage includes a first Metal Oxide S... | 04/03/2007 |
| 7200370 | Power amplifier having enhanced swing cascode architecture A Radio Frequency (RF) power amplifier includes a transconductance stage, an AC coupling element, and a cascode stage. The transconductance stage is adapted to receive an input RF voltage signal and to produce an output RF current signal. The cascode stage is adapte... | 04/03/2007 |
| 7199665 | Single to dual non-overlapping converter A converter includes an input circuit to receive a single-ended input signal to generate a number of control signals. The control signals have a delay different from one another relative to the single-ended input signal. The converter also includes a first output ci... | 04/03/2007 |
| 7199668 | Integrated circuit and optical pickup device An integrated circuit includes a first-stage amplifier circuit and a following-stage amplifier circuit connected in series, a common power source pad for supplying power to the amplifier circuits, and metal wires respectively connecting the common power source pad t... | 04/03/2007 |
| 7199652 | Amplifier; and transmitter and communication device incorporating the same The present invention provides an amplifier for amplifying a high-frequency signal and outputting an amplified signal. The amplifier includes: an amplification element which is a bipolar transistor or a field-effect transistor; and an inductor connected between a ba... | 04/03/2007 |
| 7199659 | Non-match power amplifier and method for increased output 1 dB compression point The invention enables an increase in linear power output ranges in a power amplifier by using an unmatched power amplifier driver in place of a matched power amplifier driver. ... | 04/03/2007 |
| 7196586 | Oscillator amplifier circuit operable to provide symmetric current limiting and method of same An amplifier circuit operable to provide symmetric current limiting. The amplifier circuit includes a common source amplifier for sourcing a current and receiving an voltage input, a current source, and a current limiting device coupled between the common source amp... | 03/27/2007 |
| 7196573 | Systems and methods for creating complex poles Various devices, circuits and systems including filter sections for creating complex poles are described herein. For example, various circuits including transistors, tuning capacitors and resistors are described. In the circuits, the tuning capacitor is electrically... | 03/27/2007 |
| 7193475 | Single-ended input to differential output low noise amplifier with a cascode topology A single-ended input to differential output LNA with a cascode topology of the present invention overcomes a much greater consumption of current and area for the single-ended input to differential output LNA of the prior art. The LNA needs to supply an operating bia... | 03/20/2007 |
| 7193476 | Integrated circuit An integrated circuit includes a high-frequency power amplifier and a matching circuit. The high-frequency power amplifier has at least one stage of an amplifier element. The matching circuit has a MOSFET and a detector diode. The source of the MOSFET is connected t... | 03/20/2007 |
| 7190083 | High frequency integrated circuit using capacitive bonding A high frequency integrated circuit includes a die, a package and capacitive bond. The die includes a circuit that processes a high frequency signal and also includes at least one bonding pad coupled to the circuit. The package includes a plurality of bonding posts,... | 03/13/2007 |
| 7190230 | Method and apparatus for an LNA with high linearity and improved gain control A low noise amplifier (LNA) comprises an amplifier having an inverting input, a non-inverting input and an output. A first transistor has a control input that communicates with said output of said amplifier, a first terminal that generates a LNA output current and a... | 03/13/2007 |
| 7190226 | Analog delay chain having more uniformly distributed capacitive loads and analog delay cell for use in chain A tapped delay chain comprises a plurality of delay cells where each cell has at least two output taps: a primary one for feeding forward a delayed signal to a next cell in the chain, and a secondary output tap for feeding a slightly-differently delayed signal to a ... | 03/13/2007 |
| 7187239 | Multi-band low noise amplifier A multi-band low noise amplifier capable of operating in a plurality of band modes includes a plurality of input amplifiers respectively corresponding to the plurality of band modes and an output amplifier. Each input amplifier includes a receiving port for receivin... | 03/06/2007 |
| 7187236 | Rail-to-rail differential input amplification stage with main and surrogate differential pairs An operational amplifier input stage provides a symmetrical rail-to-rail input common-mode voltage without turning off either pair of complementary differential input transistors. Secondary, or surrogate, transistor pairs assume the function of the complementary dif... | 03/06/2007 |
| 7184799 | Method and apparatus for reducing wake up time of a powered down device A dummy circuit is provided to which a bias circuit of a low noise amplifier (LNA) can be coupled to during power down of the LNA. The dummy circuit maintains the bias circuit at an approximately normal operating state to reduce wake up time of the LNA. ... | 02/27/2007 |
| 7183853 | Feedback amplifier having amplified signal path and feedback signal path separated A separation circuit part is used to separate an amplified signal path from a feedback signal path. An amplifier circuit part comprises a resistor-loaded common-source FET, a level adjustment diode and a source-follower circuit. The separation circuit part comprises... | 02/27/2007 |
| 7180921 | Method and apparatus for driving laser diode sources A method and apparatus for driving a laser diode source, such as a laser diode or a laser diode array. The driver controlling current in response to a signal indicative of excessive current or current density. The signal may be derived from the drive current, the vo... | 02/20/2007 |
| 7176759 | Differential low noise amplifier with low power consumption A low noise differential amplifier has a pair of single ended common-gate or common-base circuits and cross coupling of an input of one of the pair to the gate or base of the other one of the pair. This cross-coupling puts the differential input voltage over the Gat... | 02/13/2007 |
| 7170349 | Low voltage broadband gain cell T-coil structures are used in one embodiment to inject programmably-variable amounts of transistor biasing currents into the respective drains of current sinking transistor means of a broadband differential amplifier such that, when the differential amplifier is in ... | 01/30/2007 |
| 7164321 | Modulation dependent biasing for efficient and high linearity power amplifiers A power amplifier includes a transconductance stage and a modulation detection and bias determination module, and may include a cascode stage. The modulation detection and bias determination module operably couples to the transconductance stage and to the cascode st... | 01/16/2007 |
| 7164318 | Continuous variable-gain low-noise amplifier Continuous variable-gain low-noise amplifier. The amplifier continuously adjusts its gain between well-defined high and low values by using a cascode current-steering circuit to partition signal current between two different nodes of an output loading network. A shu... | 01/16/2007 |
| 7161430 | Low voltage folded metal oxide semiconductor field effect transistor (MOSFET) amplifier circuit A low voltage folded metal oxide semiconductor field effect transistor (MOSFET) amplifier circuit for use in a ring oscillator. Operation at a reduced minimum power supply voltage is achieved via a circuit topology with selectively coordinated transistor biasing and... | 01/09/2007 |
| 7161429 | Multi-port cross-connected multi-level cascode differential amplifier A differential cascode amplifier has first and second cascode circuits, driven by two differential signal sources including input resistances. The first cascode circuit includes a first input transistor having a first collector, a first emitter, and a first b... | 01/09/2007 |
| 7157972 | Common gate with resistive feed-through low noise amplifier A radio-frequency amplifier is provided. The radio-frequency amplifier includes a transistor having an input terminal, an output terminal, a control terminal, and a transconductance gm. A series-connected feed-through resistance Rf and feed-thr... | 01/02/2007 |
| 7154340 | Circuit for increasing the unity gain crossover frequency of an amplifier element A circuit having an input amplifier and a second amplifier that provides the circuit with a unity gain crossover frequency that is higher than a unity gain crossover frequency of the input amplifier is provided. The circuit has a control input coupled to a control i... | 12/26/2006 |
| 7151412 | Sliding cascode circuit Described techniques extend (e.g., by a factor of 2) the dynamic range of voltage swing for amplifiers and other integrated circuits (e.g., buffers) that are fabricated using lower voltage rated semiconductor processes. Such processes include, for instance, thin gat... | 12/19/2006 |
| 7151410 | Class AB enhanced transconductance source follower A low voltage, high bandwidth, enhanced transconductance, source follower circuit constructed from MOS FET devices, which operates in a class AB mode. The drain current of the source follower is sensed with a folded cascode device. The sensed current is multiplied b... | 12/19/2006 |
| 7138876 | Use of a thick oxide device as a cascode for a thin oxide transconductance device in MOSFET technology and its application to a power amplifier design A power amplifier power amplifier includes a transconductance stage and a cascode stage. The transconductance stage that is operable to receive an input voltage signal and to produce an output current signal. The transconductance stage includes a first Metal Oxide S... | 11/21/2006 |
| 7138875 | Cascoded power amplifier, particularly for use in radio frequency A power amplifier comprising at least a load element and at least an active element inserted, in series to each other, between a first and a second voltage reference is described. Advantageously, according to an embodiment of the invention, the load element comprise... | 11/21/2006 |
| 7135932 | Transimpedance amplifier A transimpedance amplifier, which is useful as an optical fiber preamplifier, is disclosed. The illustrative embodiment exhibits four characteristics. First, it minimizes the equivalent input noise current. Second, it has a wide bandwidth. Third, it has a reasonably... | 11/14/2006 |
| 7135925 | Adaptive bias scheme for high-voltage compliance in serial links A high-speed serial-link driver transmits a differential data signal to a conventional differential receiver via a differential channel. The driver employs termination voltages that are high, relative to the supply voltage employed by the transmitter core logic, to ... | 11/14/2006 |
| 7135929 | Bias voltage circuit with ultra low output impedance A bias voltage circuit with ultra low output impedance. The circuit incorporates feedback to reduce the output impedance at both low and RF frequencies. The bias circuit outputs a bias signal for biasing an amplifier. The bias circuit includes an input stage that re... | 11/14/2006 |
| 7136764 | Variable gain amplifier circuit A variable gain amplifier circuit 1 includes an amplifier A1, an amplifier A2, an inductor L1, and an inductor L2. The amplifier A1 has a predetermined gain and is connected at a terminal to a circuit output section. The amp... | 11/14/2006 |
| 7132889 | Translinear variable gain amplifier A translinear variable-gain amplifier. The translinear variable gain amplifier receives a differential input voltage and produces a differential output current having a selected gain. The amplifier comprises a buffer amplifier that receives the differential input vo... | 11/07/2006 |
| 7132887 | Low voltage semi-folded metal oxide semiconductor field effect transistor (MOSFET) amplifier circuit A low voltage semi-folded metal oxide semiconductor field effect transistor (MOSFET) amplifier circuit for use in a ring oscillator. Operation at a reduced minimum power supply voltage is achieved via a circuit topology with selectively coordinated transistor biasin... | 11/07/2006 |
| 7129787 | Systems and methods for ramping power amplifier output power 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 fir... | 10/31/2006 |
| 7126426 | Cascode amplifier structures including wide bandgap field effect transistor with field plates A multi-stage amplifier circuit arranged to take advantage of the desirable characteristics of non-field-plate and field plate transistors when amplifying a signal. One embodiment of a multi-stage amplifier according to the present invention comprises a non-field-pl... | 10/24/2006 |
