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7109801 |
Low gate oxide stress power amplifier
A power amplifier includes an input transistor, an output transistor, and circuitry. The input transistor includes an input, a first node, and a second node, wherein the second node of the input...
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7109794 |
Differential gain stage for low voltage supply
A new method and a circuit to improve the low voltage performance of a differential gain stage is achieved. The method comprises a monitoring stage and a differential stage. The monitoring stage...
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7107025 |
High gain, highly linear mixer
A high gain, highly linear mixer includes an input section, mixing section, at least one tuning component, and at least one stand by current source. The input section is operably coupled to receive...
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7102439 |
Low voltage differential amplifier circuit and a sampled low power bias control technique enabling accommodation of an increased range of input levels
A differential amplifier design and bias control technique of particular applicability for low voltage operation in which the threshold voltage of n-channel differential input transistors is...
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7102433 |
Boosting circuit
A boosting circuit is disclosed. The boosting circuit includes an input circuit part for outputting a differential current proportional to input voltages; a bias circuit part for mirroring the...
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7098825 |
Fixed offset digital-to-analog conversion device and method
I describe and claim an improved digital-to-analog conversion device and method. The device comprises a current supply circuit to generate a plurality of control currents responsive to a plurality...
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7098702 |
Transconductor circuit for compensating the distortion of output current
Provided is a transconductor circuit for compensating distortion of an output current. The transconductor circuit is a differential pair with source degeneration and includes a main circuitry to...
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7095281 |
Differential amplifier arrangement with current regulating circuit and method for operating a differential amplifier arrangement
Provision is made of a differential amplifier arrangement with a current source (S 1 ), two controllable paths (T 1 , T 2 ), which are in each case coupled by one terminal to the current source (S...
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7091785 |
Load and line regulation using operational transconductance amplifier and operational amplifier in tandem
An electronic amplifier circuit comprising an operational amplifier circuit, such as a two-stage operational amplifier circuit, in tandem with a operational transconductance amplifier. The...
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7088178 |
High-gain, bulk-driven operational amplifiers for system-on-chip applications
An ultra-low voltage rail-to-rail operational transconductance amplifier (OTA) is based on a standard digital 0.18 μm CMOS process. Techniques for designing a 0.8 volt fully differential OTA...
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7084704 |
Variable gain amplifier system
A system for controlling gain in a polar loop is disclosed. Embodiments of the invention provide for a substantially constant gain tolerant of changes in supply voltage, ambient temperature, and/or...
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7082160 |
Pulse width control system for transmitting serial data
A pulse width control system includes a serial transmission line for receiving serial data signals and a differential pair having a first transistor and a second transistor. The first and second...
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7081796 |
Radio frequency low noise amplifier with automatic gain control
A low noise amplifier ( 500 ) includes a first transconductance device ( 326 ) having a control electrode for receiving a first input signal, and a first current electrode; a first load device (...
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7071858 |
Method and system for a glitch-free differential current steering switch circuit for high speed, high resolution digital-to-analog conversion
Provided are a method and system for reducing glitch in a switch circuit. A system includes a current-steering switch circuit including a main differential pair switch coupled to a first tail...
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7071772 |
Differential amplifier
There is provided a differential amplifier including: an output terminal through which an output voltage is outputted in response to an input voltage; a first inverter-type input unit connected...
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7071779 |
Monolithic CMOS differential LNA with enhanced linearity
A low noise amplifier (LNA) is provided for a first block of a wireless receiver in a wireless communication system using CMOS technology. The LNA includes a first cascode amplifying module and a...
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7071778 |
High-speed low-power dynamic current biased operational amplifier
A high-speed low-power dynamic current biased operational amplifier (Op-amp) for use in switched capacitor circuits. The system and method reduces current in the reset process of the switched...
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7068104 |
Power amplifier utilizing high breakdown voltage circuit topology
A power amplifier utilizes cascode arrangements to achieve target performance levels for a power amplifier, such as the type used in wireless communication devices. A negative resistance circuit is...
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7068077 |
LVDS output driver having low supply voltage capability
A LVDS output driver has been disclosed. One embodiment of the LVDS output driver includes a number of source followers, each of the source followers including a pull-down transistor having a...
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7068103 |
Operational transconductance amplifier input driver for class D audio amplifiers
An audio preamplifier ( 10 ) based on an operational transconductance amplifier, in combination with a class D audio output amplifier ( 12 ) is disclosed. The input signal is coupled to the...
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7068105 |
Low-voltage differential amplifier
A low-voltage differential amplifier circuit is disclosed. The low-voltage differential amplifier circuit includes a first differential amplifier, a second differential amplifier and a summing...
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7064609 |
High voltage, low-offset operational amplifier with rail-to-rail common mode input range in a digital CMOS process
An operational amplifier with two differential pairs coupled to different current sources. The gate terminals of the transistors in the first differential pair are used as input terminals providing...
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7061321 |
Low impedance read amplifier for magnetoresistive head
A read amplifier system for connection through interconnects to a magnetoresistive (MR) head includes two input transistors, two bias transistors connected to the two input transistors by common...
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7061320 |
Differential amplifier
A differential amplifier according to the present invention comprises, in addition to a differential amplifier circuit and an output-stage amplifier circuit, a first source follower circuit for...
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7061318 |
System and method for a startup circuit for a differential CMOS amplifier
A system is provided for correcting start-up deficiencies in an amplifier. The system includes a comparing device configured to (i) receive a second circuit node voltage and a reference voltage as...
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7057672 |
Method and apparatus for high frequency data transmission and testability in a low voltage, differential swing design
A high frequency data transmission circuit including design for testability (DFT) features. An integrated circuit includes core control logic to provide a data signal and output drive logic...
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7057463 |
Differential amplifier with improved frequency characteristic
An amplifier for amplifying an input signal, having a plurality of amplifier stages each having a gain smaller than a target gain. The plurality of amplifier stages are connected in parallel and...
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7053711 |
Multistage differential amplifier
The invention relates to a multistage differential amplifier circuit having a multistage differential amplifier which has an input stage and at least one output stage connected downstream of the...
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7053712 |
Method and apparatus for controlling common-mode output voltage in fully differential amplifiers
A method for controlling the common-mode output voltage in a fully differential amplifier includes comparing a sensed common-mode output voltage of the fully differential amplifier to a reference...
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7049889 |
Differential stage voltage offset trim circuitry
Differential stage voltage offset trim circuitry involves the use of one or more trim circuits, each of which is dedicated to trimming one particular source of voltage offset (V os ) error for a...
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7049888 |
Active inductance circuit and differential amplifier circuit
An active inductance circuit comprising a signal terminal (OUT) and having voltage and current characteristics, as viewed from this terminal, which are identical to those of a circuit comprising an...
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7049890 |
Operational amplifier with self control circuit for realizing high slew rate throughout full operating range
An operational amplifier comprises: differential input stages to which differential signals can be inputted with full operating range; current source circuits coupled to determine current values of...
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7042290 |
Output stage circuit for an operational amplifier
An output stage circuit is configured for enabling an output of an amplifier circuit to be pulled upwards and/or downwards to or beyond an upper power supply or below a lower power supply. The...
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7042289 |
Transconductance control circuit of rail-to-rail differential input stages
A transconductance control circuit of a rail-to-rail differential input stage is described. The transconductance control circuit senses the gate-source voltages of PMOS and NMOS differential pairs,...
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7038501 |
Transconductor circuit for compensating the distortion of output current
Provided is a transconductor circuit for compensating distortion of an output current without reducing the size of chips and operation speed characteristics. The transconductor circuit includes a...
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7034615 |
CMOS operational amplifier
A CMOS (Complementary Metal Oxide Semiconductor) operational amplifier includes: an amplifying unit for differentially amplifying signals inputted to an inverting input terminal and non-inverting...
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7030695 |
Low threshold voltage circuit employing a high threshold voltage output stage
An amplifier circuit uses low threshold voltage devices for mid rail response in low voltage applications, but uses a high threshold voltage device at an output stage of the amplifier to generate...
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7030696 |
Differential amplifier and semiconductor device
A differential amplifier for amplifying an input signal at a constant amplification rate regardless of fluctuation in the center voltage of the input signal. The differential amplifier includes a...
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7026865 |
Analogue amplifier with multiplexing capability
An analogue amplifier with multiplexing capability, without the need to incorporate a multiplexor, comprising an input port, a test input port, an output port, a control input to switch the...
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7019730 |
Power supply circuit, operational amplifier circuit, liquid crystal device and electronic instrument
An operational amplifier having a first step-up circuit in the power supply circuit generates a first stepped-up potential level obtained by stepping up a power-supply level with a ground level...
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7019590 |
Self-stabilizing differential load circuit with well controlled impedance
A circuit for providing a self-stabilizing, differential load circuit with well controlled impedance to an amplifier is described. According to one embodiment, two pairs of transistors in a...
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7019592 |
Amplifier apparatus, method, and system
An amplifier includes multiple gain ranges. The gain range can be set by electrically adding or removing load devices.
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7019591 |
Gain boosted operational amplifier having a field effect transistor with a well biasing scheme
A biasing scheme for a MOSFET that mitigates the MOSFET body effect. The biasing scheme can be realized replicating the voltage at the source terminal of a MOSFET and applying this replicated...
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7012465 |
Low-voltage class-AB output stage amplifier
A programmable, rail-to-rail, low-voltage, micro-power harmonic-mean class-AB output stage with MOS devices employed in weak inversion is provided. The output stage MOS devices are arranged in the...
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7013117 |
Analog power detection for gain control operations
A method and apparatus for dynamically controlling a programmable gain amplifier (PGA) in a radio receiver to provide a plurality of gain steps thereby providing automatic gain control (AGC) in a...
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7005920 |
Programmable passive inductor
A programmable passive inductor includes two inductors or coils, each having a self-inductance, magnetically coupled together and having a mutual inductance proportional to a magnetic coupling...
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7002405 |
Linear low noise transconductance cell
A low noise transconductance cell includes a resistor and a differential circuit pair having two equivalent half-circuits. Each half-circuit includes a feedback loop coupled to the resistor. The...
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6998907 |
Apparatus and method for receiving high-common mode voltage range signals with low-voltage devices
An input stage employs low-voltage MOSFETs as input devices for an operational amplifier circuit that operates at common mode voltages that may exceed the gate-oxide breakdown voltage of the input...
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6995611 |
Inductive amplifier with a feed forward boost
An inductive amplifier having a feed forward boost is provided, thereby improving the gain of the inductive amplifier at frequencies greater than 1 GigaHertz. The inductive amplifier includes a...
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6987421 |
Common mode voltage generation at a differential output of an amplifier
A common mode voltage generating circuit has a first and a second output terminal (O 1 , O 2 ) to supply a common mode voltage (Vcm) to a differential output of an amplifier stage (AMP). A first...
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