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| Number | Title | Issue Date |
| 8143949 | Push-pull linear hybrid class H amplifier Several push-pull linear hybrid class H amplifiers are disclosed. A split power rail provides a positive supply rail and a negative supply rail in response to a power supply control voltage. A push-pull amplifier stage is powered by the positive and negative supply ... | 03/27/2012 |
| 7944301 | Method and apparatus for an amplifier An amplifier including complementary push and pull components, a bias component and a quiescent current balancer. The complementary push and pull components are serially coupled to one another between an electrical source and sink to generate an output signal at a c... | 05/17/2011 |
| 7728670 | Method and apparatus for an amplifier An amplifier including complementary push and pull components, a bias component and a quiescent current balancer. The complementary push and pull components are serially coupled to one another between an electrical source and sink to generate an output signal at a c... | 06/01/2010 |
| 7411454 | Electron turbulence damping circuit for a complimentary-symmetry amplification unit An electron turbulence damping circuit (40) for a complimentary-symmetry unit (10′) includes a first output device (12′) having a first conductivity and a second output device (14′) having a second conductivity that is opposite the ... | 08/12/2008 |
| 7400196 | Ultra wide band, differential input/output, high frequency amplifier in an integrated circuit A wide band amplifier includes a core amplifier having input terminals and output terminals for, respectively, receiving differential input signals and providing amplified differential output signals. A bandwidth peaking network is coupled to the core amplifier and ... | 07/15/2008 |
| 7394316 | High speed, high current gain voltage buffer and method An amplifying circuit which may be useful in a diamond buffer amplifier or operational amplifier includes an input transistor including an emitter, a collector, and a base coupled to receive an input voltage. An adjustable current source circuit is coupled between a... | 07/01/2008 |
| 7368992 | Load-invariant amplifier A push-pull amplifier having low output impedance and low crossover distortion is provided. A least one of a current through a sourcing current path of an output stage and a current through a sinking current path of the output stage is determinative of a quiescent c... | 05/06/2008 |
| 7352243 | Voltage comparator circuit A voltage comparator that realizes high-speed operation with a simple structure includes an input differential stage having a first differential pair and a second differential pair, into which a differential voltage is inputted from differential input terminals In | 04/01/2008 |
| 7348850 | Electronic circuit for amplification of a bipolar signal Consistent with an example embodiment, there is an electronic circuit for amplification of bipolar symmetric current signals. The electronic circuit has a pair of complimentary current mirrors. Depending on the polarity of the bipolar current signal one or the curre... | 03/25/2008 |
| 7323898 | Pin electronics driver Circuitry for driving a pin includes a first resistive circuit connected to the pin, a first transistor circuit to connect the first resistive circuit to a logic level voltage in response to a trigger voltage, the first transistor circuit and the first resistive cir... | 01/29/2008 |
| 7313244 | Circuit and method for eliminating pop noise in digital audio amplifier using dual power supply Provided are a circuit for and a method of eliminating pop noise in a digital audio amplifier using dual power supply, which are simple, drop in price, and can be readily implemented in a semiconductor chip. According to an existing technique, pop noise is eliminate... | 12/25/2007 |
| 7269254 | Integrated driver circuitry A linear amplifier architecture includes first, second, and third stages. The first stage is a transconductance stage. The third stage is a current amplification stage. The second stage is an interfacing stage between the first and third stages. The interfacing stag... | 09/11/2007 |
| 7268626 | Compensating a power amplifier based on operational-based changes A method for compensating a power amplifier based on operational-based changes begins by measuring one of a plurality of operational parameters of the power amplifier to produce a measured operational parameter. The method continues by comparing the measured operati... | 09/11/2007 |
| 7266159 | Frequency-dependent magnitude pre-distortion on non-baseband input signals for reducing spurious emissions in communication networks Pre-distortion, whose magnitude—and preferably phase—are frequency-dependent, is applied to a non-baseband input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the pre-distortion tech... | 09/04/2007 |
| 7251293 | Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics An input signal is pre-distorted to reduce spurious emissions resulting from subsequent signal amplification. Frequency-dependent pre-distortion is preferably implemented in combination with frequency-independent pre-distortion, where the frequency-dependent pre-dis... | 07/31/2007 |
| 7248642 | Frequency-dependent phase pre-distortion for reducing spurious emissions in communication networks A frequency-dependent phase pre-distortion technique is applied to an input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the frequency-dependent phase pre-distortion of the present inve... | 07/24/2007 |
| 7242250 | Power amplifier A power amplifier includes an input circuit, three power supply lines with voltages successively decreasing in an order of first, second and third power supply lines, a push-side driving circuit and a pull-side driving circuit which receive control signals from the ... | 07/10/2007 |
| 7224227 | Apparatus and method for correction of error caused by reverse saturation current mismatch A buffer circuit is arranged for offset cancellation between an input voltage and a buffered voltage. The buffer circuit includes two bias current sources, two p-type transistors, and two n-type transistors. Further, the base-emitter voltages of the two p-type trans... | 05/29/2007 |
| 7200238 | Acoustic signal level limiter An acoustic signal level limiter provides a telephone handset/headset user protection against loud audible signals generated within a communications system. The acoustic signal limiter comprises an acoustic signal level attenuation circuit and at least one acoustic ... | 04/03/2007 |
| 7197085 | Frequency-dependent magnitude pre-distortion for reducing spurious emissions in communication networks Pre-distortion, whose magnitude—and preferably phase—are frequency-dependent, is applied to an input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the pre-distortion technique of the... | 03/27/2007 |
| 7193425 | Semiconductor test device The present invention provides a semiconductor test device that can output a higher voltage as a driver output without increasing power consumption of a high-speed driver, so as to test a device under test. In order to achieve this, the semiconductor test device for... | 03/20/2007 |
| 7193448 | Wide dynamic range operational amplifier An operational amplifier has a bias circuit, a differential amplifier, an output stage, and a feed forward circuit. The bias circuit provides a reference. The differential amplifier is coupled to a pair of input terminals and provides a differential output based on ... | 03/20/2007 |
| 7183672 | MOSFET based, high voltage, electronic relays for AC power switching and inductive loads A MOSFET based, high voltage, high current AC electronic relay includes a MOSFET switching circuit selectively switching between switch conducting and switch isolation. The relay also includes a transformer coupled to the MOSFET switching circuit, the transformer se... | 02/27/2007 |
| 7184583 | Image system for processing image data An image system for processing image data in the form of grey-scale value signals and for generating an image that can be displayed on a presentation device, in particular for a medical diagnostic device, has a circuit to harmonize the image data. This circuit is fa... | 02/27/2007 |
| 7149483 | Amplifying diversity signals using power amplifiers A method for amplifying diversity transmit signals includes receiving a transmit signal at a vector modulator, where the vector modulator processes the transmit signal to yield diversity transmit signals, amplifying each of the diversity transmit signals according t... | 12/12/2006 |
| 7145393 | Operational amplifier with class-AB+B output stage An operational amplifier is provided that includes a Class-AB stage and a Class-B stage coupled in parallel with each other to form an output stage. The Class-AB stage is operable to drive an output load. The Class-B stage is also operable to drive the output load a... | 12/05/2006 |
| 7139327 | Digital pre-distortion of input signals for reducing spurious emissions in communication networks Pre-distortion, whose magnitude—and preferably phase—are frequency-dependent, is applied to an input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the pre-distortion technique of the... | 11/21/2006 |
| 7135927 | Ultra fast, low noise operational amplifier with dynamic biasing The present invention achieves technical advantages as an operational amplifier (30) having both a high slew rate and a full power bandwidth with low distortion by providing resistors (R6, R7, R9, R10) in place of active loads coup... | 11/14/2006 |
| 7116171 | Operational amplifier and driver circuit using the same An operational amplifier is provided including first and second conduction types of differential amplifier circuits, an output circuit for outputting an output signal by first and second driver transistors of the first and the second conduction types. The differenti... | 10/03/2006 |
| 7114791 | Head driving device of liquid jetting apparatus and method of driving the same A head driving device of a liquid jetting apparatus includes a driving element, respectively provided corresponding to plural nozzles from which a liquid droplet is jetted, a driving waveform generating circuit, generating a driving waveform to drive the driving ele... | 10/03/2006 |
| 7103487 | Circuitry and methods for current measurements referred to a precision impedance Circuitry and methods for obtaining accurate measurements of current supplied by an integrated circuit are provided. Current calculations are performed using information from a precision termination resistor and from the ratio relationship of two on-chip resistors. ... | 09/05/2006 |
| 7102440 | High output current wideband output stage/buffer amplifier A high output current wideband output stage/buffer amplifier that has reduced quiescent current requirements. The output stage/buffer amplifier includes a diamond follower circuit having a pair of complementary output load-driving bipolar junction transistors (BJTs)... | 09/05/2006 |
| 7091789 | Output circuit It is an object of the present invention to provide an output circuit capable of reducing a consumption current while an output current is suppressed in a case where limitation is placed on an output voltage so as not to fall to a predetermined voltage or less in an... | 08/15/2006 |
| 7078973 | Bipolar rail-to-rail output stage A bipolar rail-to-rail class-AB output stage that provides improved AC performance in low voltage applications. The bipolar output stage includes an input buffer stage, first and second complementary common emitter stages, and first and second control circuits biase... | 07/18/2006 |
| 7071777 | Digital memory-based predistortion technique The present invention discloses a system and a method for memory-based predistortion to reduce the distortion effects introduced by a power amplifier. The distortion effects include both memoryless and memory effects. The input and the corresponding output values of... | 07/04/2006 |
| 7053699 | Current output stages Current output stages are provided. In accordance with an embodiment, a current output stage includes a voltage follower circuit, a first current mirror and a second current mirror. A node of the voltage follower circuit provides a voltage that follows a voltage at ... | 05/30/2006 |
| 7042293 | DC/DC converter using bipolar transistor, method of manufacturing the same and DC power supply module using the same A DC/DC converter is comprised of a bipolar transistor, an inductor, a smoothing capacitor, an input terminal, an output terminal, and a grounded terminal. A base of the transistor includes a silicon germanium layer. The bipolar transistor has a high switching speed... | 05/09/2006 |
| 7015756 | Push-pull buffer/amplifier A differential circuit comprises first, second, third and fourth devices that have first, second, third and fourth control terminals, respectively. The second and fourth devices are arranged in series with the first and third devices, respectively. A first output co... | 03/21/2006 |
| 7009451 | Image display apparatus and high voltage driver circuit A driver circuit of an image display apparatus comprises driver circuit with a class A/B push-pull stage (T3, T5). The driver circuit contains an n-type pull transistor (T3), an n-type control transistor (T2) with a main current channel t... | 03/07/2006 |
| 6982600 | Class G-amplifiers An output stage for a Class-G amplifier includes four current mirrors, (CmpL) powered by a first low voltage supply (VspL), (Cmph) powered by a first high voltage supply (Vsph), (CmmL ) powered by a second low voltage supply (VsmL), and (Cmmh) powered by a second hi... | 01/03/2006 |
