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| Number | Title | Issue Date |
| 8174321 | Apparatus and method for miller compensation for multi-stage amplifier An amplifier circuit includes a first amplifier stage having a first output node; a second amplifier stage having a second output node; and a compensation block electrically coupled between the first and second output nodes. The compensation block has a compensation... | 05/08/2012 |
| 8058931 | Enhancing an operational amplifier's capacitive load driving capability using parallel Miller feedback An apparatus for an improved operational amplifier. The disclosed improved operational amplifier comprises an operational amplifier, a first feedback circuit, and one or more secondary feedback circuits. The operational amplifier include a plurality of serially coup... | 11/15/2011 |
| 8054134 | Coupling isolation method and operational amplifier using the same A coupling isolation method for preventing a load signal from coupling into an operational amplifier is disclosed. The coupling isolation method includes generating a system signal before the operational amplifier outputs a computation result, switching off a Miller... | 11/08/2011 |
| 8035450 | Operational transconductance amplifier having two amplification stages An operational amplifier having a first amplification stage with an input terminal to receive a signal to be amplified, and a first output terminal, and a second amplification stage having a first input terminal connected to the first output terminal, and an output ... | 10/11/2011 |
| 7986188 | Non-inverting amplifier circuit, semiconductor integrated circuit, and phase compensation method of non-inverting amplifier circuit A circuit includes a differential amplifier unit that receives an input signal at a non-inverting input thereof, a constant current source, a load circuit, an output transistor that receives an output of the differential amplifier unit as an input and drives a load ... | 07/26/2011 |
| 7973605 | Three-stage frequency-compensated operational amplifier for driving large capacitive loads A three-stage frequency-compensated operational amplifier includes a first-stage circuit, a second-stage circuit incorporated with a first compensation circuit, a third-stage circuit, and a second compensation circuit. The three-stage frequency-compensated operation... | 07/05/2011 |
| 7907015 | Circuit for compensation of leakage current-induced offset in a single-ended op-amp An electronic device includes an operational amplifier, with the operational amplifier having an amplifier input stage coupled with a first output node to an amplifier output stage. A compensation capacitance is connected between an output node of the amplifier outp... | 03/15/2011 |
| 7880545 | Cascode compensation circuit and method for amplifier stability The present invention provides compensation for circuits. In one embodiment, a compensation circuit has a first terminal coupled to an output terminal of the circuit and a second terminal coupled to feed back the output voltage to an internal node. A damping circuit... | 02/01/2011 |
| 7863985 | High frequency amplifier linearization technique An output stage for an amplifier is provided. The amplifier generally provides for compensation of an error current generated by the base-collector (or gate-drain) capacitance of a common base (or gate) amplifier transistor. The stage accomplishes this by utilizing ... | 01/04/2011 |
| 7855602 | Amplifier arrangement and signal generation method An amplifier arrangement includes an output amplifier stage (OA) comprising a stage input (SIN), a stage output (SOUT) which is coupled to a signal output (OUT) of the amplifier arrangement, and a capacitive element (CE) which couples the stage output (SOUT) to the ... | 12/21/2010 |
| 7825732 | Compensation for amplifiers driving a capacitive load This disclosure relates to load compensating multi-stage amplifier structures at an output of one of the amplifier stages. ... | 11/02/2010 |
| 7750739 | Dual reactive shunt low noise amplifier A dual reactive shunt feedback low noise amplifier design may include a transconductance amplifier having a capacitor coupled across it and a pair of coupled inductors coupled across it. In one embodiment, the coupled inductors may be laid out as two overlapping coi... | 07/06/2010 |
| 7683719 | Internal frequency compensation circuit for integrated circuit controllers A frequency compensation circuit internal to an integrated circuit which comprises a transconductance amplifier having a first input configured to receive a reference voltage, a second input configured to receive an input voltage and an input current, a first output... | 03/23/2010 |
| 7671683 | Semiconductor integrated circuit and method for adjusting a capacitance value of a phase compensating capacitor A semiconductor integrated circuit has an amplifier circuit which includes a phase compensating capacitor and has a feedback loop, and a stability determining and adjusting circuit which measures an amplitude of a voltage outputted from the amplifier circuit at a pr... | 03/02/2010 |
| 7652538 | Circuits and methods for improving slew rate of differential amplifiers Circuits and methods are provided for providing high speed operational amplifiers and, in particular, operational amplifiers having frequency compensation circuits that provide improved slew rates with low power dissipation when configured with feedback. Frequency c... | 01/26/2010 |
| 7646246 | Semiconductor device A semiconductor device includes a phase compensation circuit 6 using a MOS capacitor with a structure in which an insulating film is disposed between a gate electrode formed on a semiconductor substrate and a diffusion layer. The phase compensation circuit in... | 01/12/2010 |
| 7646247 | Ahuja compensation circuit for operational amplifier A frequency compensated operational amplifier includes: an input stage, for receiving an input signal; an output stage, coupled to the input stage, for generating an output signal according to an output of the input stage; a first current source, for providing a fir... | 01/12/2010 |
| 7642855 | Compensation of an amplifier comprising at least two gain stages An embodiment of an amplifier circuit comprising a succession of amplification stages having at least a first amplification stage receiving a first signal and a second amplification stage downstream of the first amplification stage; a stage of unity gain capable of ... | 01/05/2010 |
| 7639083 | Compensation for parasitic coupling between RF or microwave transistors in the same package Parasitic coupling effects between RF or microwave transistors provided in a common package are compensated by connecting one or more capacitors between the transistors. By connecting the capacitor(s) at a location that corresponds to the site of the coupling, the c... | 12/29/2009 |
| 7619478 | Operational amplifier having its compensator capacitance temporarily disabled An operational amplifier includes a differential amplifier connected between an input and an output port of the operational amplifier, a phase compensator capacitance connected between the differential amplifier and the output port, a switching transistor for contro... | 11/17/2009 |
| 7602250 | Low noise AC differential amplifier with reduced low corner frequency and current consumption An integrated amplifier may include a transconductance stage including a differential pair of input transistors of a first type of conductivity, respective resistive loads coupled to said input transistors, and a first bias circuit coupled to the input transistors. ... | 10/13/2009 |
| 7595695 | Compensated operational amplifier and active RC filter including such an amplifier A method of compensating a monolithic integrated operational amplifier against process and temperature variations, such that the operational amplifier is suitable for use in an active filter, the method comprising a providing an amplifier having a first stage and an... | 09/29/2009 |
| 7560991 | Dynamically compensated operational amplifier An operational amplifier is dynamically compensated depending on the internal state of the operational amplifier. Compensation is fully enabled only when the internal state indicates a risk of instability. When the internal state of the operational amplifier indicat... | 07/14/2009 |
| 7551033 | Dynamic bandwidth compensating method and associated apparatus A programmable gain amplifier includes an operational amplifier coupled thereto a plurality of resistors to perform a feedback control, thereby rendering a closed-loop gain A | 06/23/2009 |
| 7548117 | Differential amplifier having an improved slew rate A differential amplifier receives a differential input signal and generates an output signal at an output node. An auxiliary circuit coupled to the differential amplifier operates to improve slew rate response. In quiescent and small signal situations with respect t... | 06/16/2009 |
| 7541873 | High frequency amplifier configuration for improved feedback capacitance neutralization A high frequency amplifier is provided with: an input terminal receiving a high frequency signal; an output terminal; a three-terminal active element having a first terminal connected with the input terminal and a second terminal connected with the output terminal; ... | 06/02/2009 |
| 7449956 | Semiconductor device An inductively degenerated low noise amplifier arrangement is shown having a transistor and a bonding pad connected to the input terminal of the transistor, wherein the bonding pad has parasitic capacitance, and wherein the bonding pad includes a metal layer connect... | 11/11/2008 |
| 7417505 | CMOS amplifiers with frequency compensating capacitors The frequency and transient responses of a CMOS differential amplifier are improved by employing one or more compensating capacitors. A compensating capacitor coupled to a differential input of the CMOS differential amplifier is used to inject current into the diffe... | 08/26/2008 |
| 7394317 | Amplifying circuit having bias voltage setting mechanism An amplifying circuit having a bias voltage setting mechanism includes: a first amplifying element that amplifies an input signal and outputs the amplified signal as an output signal; a bias voltage setting unit that generates a bias voltage from the output signal o... | 07/01/2008 |
| 7362173 | System and method for providing slew rate enhancement for two stage CMOS amplifiers A slew rate enhancement circuit is disclosed for increasing a slew rate in a two stage CMOS amplifier. The slew rate enhancement circuit detects an input signal transition in the two stage CMOS amplifier. Depending on the polarity of the input signal transition the ... | 04/22/2008 |
| 7355479 | Neutralization of feedback capacitance in amplifiers A transistor amplifier circuit has a current to current feedback transformer for neutralization of feedback capacitance and setting the input impedance of the amplifier. IM3 cancellation is implemented by out-of-band terminations at the input, which does not depend ... | 04/08/2008 |
| 7348851 | Miller-compensated amplifier A Miller-compensated amplifier, having an amplifier input and an amplifier output, comprises a first gain stage, a second gain stage, a third gain stage, and a capacitor. The first gain stage has the amplifier input as a first gain stage input thereto and a first ga... | 03/25/2008 |
| 7342435 | Input stage resistant against negative voltage swings Apparatus (10) comprising a level shifter (15) connectable to a signal input (1) for receiving an input signal (s(t)) with a negative signal swing. The level shifter (15) provides for a DC shift of the input signal (s(t)) to provide an ou... | 03/11/2008 |
| 7339431 | CMOS amplifiers with frequency compensating capacitors The frequency and transient responses of a CMOS differential amplifier are improved by employing one or more compensating capacitors. A compensating capacitor coupled to a differential input of the CMOS differential amplifier is used to inject current into the diffe... | 03/04/2008 |
| 7332971 | Multi-gigabit/s transimpedance amplifier for optical networks A Gigabit/s transimpedance amplifier system includes a forward-path amplifier section with a very large bandwidth and an overall frequency-selective feedback section which is active only from DC to low frequencies. The forward-path of the amplifier comprises a regul... | 02/19/2008 |
| 7332967 | Variable gain amplifier with low phase variation A VGA is provided that is designed to reduce or even eliminate entirely variations in phase response/shift with changes in gain. Compensation is made for parasitic capacitances of elements in the VGA that would otherwise cause variation in phase with changes in gain... | 02/19/2008 |
| 7323854 | Zero cancellation in multiloop regulator control scheme Control loops in a voltage regulator can be stabilized using minimal silicon area. A current limit signal, generated by a current limit control loop in the voltage regulator, can be divided to minimize a zero provided in a compensation set associated with a voltage ... | 01/29/2008 |
| 7295070 | Flip around switched capacitor amplifier A flip around amplifier circuit is provided that includes an amplifier having first and second amplification stages, a Miller capacitor, and a resistive element in series with the Miller capacitor, where an output line of the second amplification stage can be couple... | 11/13/2007 |
| 7289784 | Active tunable filter circuit An active tunable filter circuit for use as an integratable active filter in a mobile radio apparatus, comprises an active amplifier circuit (A) including a reactive feedback network including a first tunable element (L1) set to pass with amplification a want... | 10/30/2007 |
| 7279981 | Compensation method for low voltage, low power unity gain amplifier A unity gain amplifier has a current mirror. A compensation circuit has an input coupled to an output of the current mirror. An output transistor has a base coupled to the output of the current mirror and a source of the output transistor is coupled to an output of ... | 10/09/2007 |
