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| Number | Title | Issue Date |
| 8188792 | Techniques for current mirror circuits A circuit includes a current mirror circuit and first and second transistors coupled as a differential pair. A first input voltage is provided to a control input of the first transistor. A second input voltage is provided to a control input of the second transistor.... | 05/29/2012 |
| 8159302 | Differential amplifier circuit A differential amplifier circuit includes: P-type and N-type differential input units outputting respectively first and second outputs in response to first and second input voltages; a P-type current mirror circuit driven by the second output; an N-type current mirr... | 04/17/2012 |
| 8134407 | Enhancing dual op-amps for differential connections In an embodiment of the invention, a differential input signal is coupled to a plurality of transconductance blocks. In some embodiments, each of the transconductance blocks divide an input transconductance among a plurality of signal paths to a plurality of outputs... | 03/13/2012 |
| 8102210 | Low phase noise amplifier circuit The amplifier circuit (1) includes a differential pair of PMOS transistors at input (P3, P4), whose source receives a current from a current source (3). The gate of the first transistor (P3) of the pair defines a non-inverting inpu... | 01/24/2012 |
| 8085092 | Amplifier arrangement and method for amplification An amplifier arrangement comprises a first transistor (18), a first bias transistor (13) and a first field-effect transistor (51). A first input signal (VN) is supplied for amplification to a control terminal of the first transistor (18).... | 12/27/2011 |
| 8067983 | High bandwidth, rail-to-rail differential amplifier with intermediate stage current amplifier An error amplifier expected to exhibit rail-to-rail operation, high bandwidth, and high slew rate, is described, the error amplifier comprising a first stage to receive an input differential voltage and to provide transconductance gain, an intermediate stage to prov... | 11/29/2011 |
| 8008972 | Differential signal generator circuit A differential signal generator circuit includes: a first amplifier for comparing an input signal with a threshold voltage and outputting differential signals; and a second amplifier for adjusting the threshold voltage in response to the differential signals. The se... | 08/30/2011 |
| 7999617 | Amplifier circuit An amplifier circuit, comprising a differential input stage (M1, M2), two cross-coupled current mirrors (M3, M4; M5, M6) coupled to respective outputs of the differential input stage (M1, M2), and a minimum sel... | 08/16/2011 |
| 7982538 | Differential output circuit and communication device A differential includes first and second current mirror circuits that provide the gates of slave transistors with gate voltages of master transistors via a voltage follower where a slew rate at a rise time is equal to a slew rate at a fall time. Thus, when the maste... | 07/19/2011 |
| 7907012 | Current mirror with low headroom and linear response A current mirror circuit provided in an emitter follower configuration achieves linear output currents over a range of input currents by operating in response to a bias current that is a replica of the input current. The current mirror may include a pair of transist... | 03/15/2011 |
| 7859339 | Differential amplification circuit A differential amplification circuit is constituted of a differential transistor pair including a pair of n-channel MOS transistors whose sources are connected together, a constant current source circuit which is connected to the sources of the differential transist... | 12/28/2010 |
| 7834694 | Differential current mirror circuit A differential current mirror circuit includes: a first branching unit that branches current through a first current input terminal to a first current path and a second current path; a second branching unit that branches current through a second current input termin... | 11/16/2010 |
| 7834695 | Differential input amplifier An amplifier comprises: first and second supply terminals intended to receive a DC supply voltage; a first branch coupled between the first and second supply terminals and including a first terminal of application of a differential signal to be amplified; a second b... | 11/16/2010 |
| 7808321 | Amplifier circuit An amplifier circuit includes first and second transistor circuits, a current supply unit, and a current sink unit. The first transistor circuit is operatively responsive to a first input signal, and the second transistor circuit is operatively responsive to a secon... | 10/05/2010 |
| 7791414 | Low voltage current feedback amplifier with near rail to rail input common mode voltage range An embodiment of the present invention is directed to a current feedback amplifier. The amplifier is coupleable with a first supply rail and a second supply rail. The current feedback amplifier includes an input stage configurable to provide a first input and a seco... | 09/07/2010 |
| 7786803 | Operational transconductance amplifier (OTA) Apparatus and methods provide an operational transconductance amplifier (OTA) with one or more self-biased cascode current mirrors. Applicable topologies include a current-mirror OTA and a folded-cascode OTA. In one embodiment, the self-biasing cascode current mirro... | 08/31/2010 |
| 7649417 | Apparatus and method for input stage and bias canceller for an audio operational amplifier An input bias cancellation stage for an audio operational amplifier is provided. The input bias cancellation stage includes an input differential pair, a current mirror, and a bias duplicator transistor that substantially duplicates the input bias current. The bias ... | 01/19/2010 |
| 7626458 | Common-mode bandwidth reduction circuit and method for differential applications An amplifier driver circuit (10) includes first (11-1) and second (11-2) feedback amplifiers including first (14-1) and second (14-2) upper current mirrors, respectively, and first (16-1) a... | 12/01/2009 |
| 7586373 | Fully differential class AB amplifier and amplifying method using single-ended, two-stage amplifier A fully differential amplifier includes a first single-ended current mirror type fully differential amplifier outputting a first output signal by two stage amplifying a difference between a first input signal and a second input signal and a second single-ended curre... | 09/08/2009 |
| 7541871 | Operational transconductance amplifier (OTA) Apparatus and methods provide an operational transconductance amplifier (OTA) with one or more self-biased cascode current mirrors. Applicable topologies include a current-mirror OTA and a folded-cascode OTA. In one embodiment, the self-biasing cascode current mirro... | 06/02/2009 |
| 7521998 | Operational amplifier and scanning electron microscope using the same An operational amplifier and a scanning electron microscope which are capable of dealing with high voltage and large current, and which allow implementation of stable and precise amplification, the operational amplifier having a first-stage amplification unit includ... | 04/21/2009 |
| 7486140 | Differential amplifier A differential amplifier of the present invention comprises transistors where to each of which one of two inputs to said differential amplifier is provided; current mirror circuits where each of which delivers one of the outputs of the differential amplifier to the ... | 02/03/2009 |
| 7479831 | Class AB differential current conveyor input stage for a fully differential current feedback amplifier Disclosed herein is technology for, among other things, a current feedback fully differential amplifier. The amplifier includes an input stage operable to sense an input current at a first terminal and a second terminal. The input stage includes a first buffer havin... | 01/20/2009 |
| 7479832 | Differential amplifying system A differential amplifying system has a differential amplifier for amplifying a voltage signal inputted from an input terminal and outputting the amplified voltage signal through an output terminal; an amplitude detection circuit for detecting an amplitude of said vo... | 01/20/2009 |
| 7471150 | Class AB folded cascode stage and method for low noise, low power, low-offset operational amplifier A class AB folded cascode circuit includes a differential current follower having first and second cascode transistors with emitters connected to first and second input conductors. An input of a first current mirror is coupled to the first input conductor, and an in... | 12/30/2008 |
| 7466200 | Composite output stage for hard disk drive preamplifier An apparatus for supplying a load current. The apparatus comprises a first differential amplifier producing a differential output signal and an output buffer comprising a first and a second parallel emitter follower transistors each producing a current responsive to... | 12/16/2008 |
| 7446610 | Low voltage CMOS differential amplifier A low voltage CMOS differential amplifier is provided. More specifically, in one embodiment, a device comprising a differential pair is provided. A self-biased transistor and a component are coupled to the differential pair. At least one of the self-biased transisto... | 11/04/2008 |
| 7443239 | Differential amplifier, data driver and display device A differential amplifying circuit that includes a differential pair and a cascode current mirror circuit that forms the load circuit of this differential pair. The cascode current mirror circuit includes a control-terminal-coupled first transistor pair, and second a... | 10/28/2008 |
| 7443234 | Differential amplifier, digital-to-analog converter and display device Disclosed are a multi-level differential amplifier that includes first to third input terminals; an output terminal; first to third differential pairs; a current source circuit for supplying currents to the respective first to mth differential pairs; a load circuit ... | 10/28/2008 |
| 7443238 | Amplifier stage, operational amplifier and method for amplifying a signal An amplifier stage includes a first and a second signal path having a series connection of a first transistor of a first conduction type which forms a control input for receiving an input signal to the amplifier stage and a second transistor of a second conduction t... | 10/28/2008 |
| 7436261 | Operational amplifier An operational amplifier includes: a differential amplifier circuit configured to receive an inverting input voltage (VIN−) and a non-inverting input voltage (VIN+); and an auxiliary circuit for improving a slew rate of an output voltage of the differential amplif... | 10/14/2008 |
| 7425867 | Differential input/differential output converter circuit A differential input/differential output converter circuit. The circuit comprises differential complementary input modules each comprising cross-coupled devices for biasing current mirror masters to a condition that increases the operating speed in response to a tra... | 09/16/2008 |
| 7423486 | Silicon-on-insulator differential amplifier circuit A differential amplifier formed on a silicon-on-insulator substrate, including means to prevent the bodies of its differential input transistors from charging to unwanted potentials in the standby state. In one aspect of the invention, the means takes the form of sw... | 09/09/2008 |
| 7414473 | Class AB folded-cascode amplifier having cascode compensation A class AB folded-cascode amplifier having improved gain-bandwidth product, comprises a differential input circuit including a differential transistor pair coupled to a source of tail current and responsive to a differential input signal for conducting a first curre... | 08/19/2008 |
| 7411453 | Tail-current steering circuit and method for rail-to-rail operational amplifier input stage An amplifier includes first and second pairs of differentially coupled input transistors. The first current mirror generates a reference current which is mirrored by a second current mirror to produce a mirrored reference current. Current steering circuitry steers t... | 08/12/2008 |
| 7405620 | Differential amplifier and method A method of forming a differential amplifier on a substrate which has a greater tolerance for applied voltages and a chip so formed. The differential amplifier circuit on a substrate has additional transistors connected with resistors which form a voltage divider, t... | 07/29/2008 |
| 7402984 | Oscillation sensor for linear regulation circuit An oscillation sensor for a regulator that provides dynamic control of a connection/disconnection of a compensation capacitance. The compensation capacitor is disconnected under normal operation and is automatically connected if oscillation is detected in the output... | 07/22/2008 |
| 7391404 | Thin film transistor circuit and semiconductor display device using the same There is provided a thin film transistor circuit used for a driver circuit for providing a semiconductor display device without a picture blur and with high fineness/high resolution. In the thin film transistor circuit, a TFT having a large size (channel width) is n... | 06/24/2008 |
| 7389087 | Adaptive radio transceiver with filtering An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ... | 06/17/2008 |
| 7388432 | Current feedback amplifier with extended common mode input range A Current Feedback Amplifier (CFA) is arranged to receive an input signal having a common mode (CM) range that is greater than the voltage across the supply rails. The CFA contains a rail-to-rail output stage that is configured to output an output signal in response... | 06/17/2008 |
