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| Application No. | Application Title | Issue Date |
| 20110133839 | ARRANGEMENT FOR CALIBRATING THE QUIESCENT OPERATING POINT OF A PUSH-PULL AMPLIFIER A signal processing arrangement comprises an amplifier (AMP V1) that includes a stage with complementary transistors (MP3, MN3) of opposite conductivity type arranged in series between two supply lines (+, −). A controllable biasing circuit (CCS) ... | 06/09/2011 |
| 20090051431 | HIGH-SWING OPERATIONAL AMPLIFIER OUTPUT STAGE USING ADAPTIVE BIASING An output stage includes two transistors (switching transistor and biasing transistor) coupled in series in a pullup current path between a VDDA node and an output node, and also includes two transistors (switching transistor and biasing transistor) coupled in series in... | 02/26/2009 |
| 20090033423 | OUTPUT BUFFER AND POWER AMPLIFIER COMPRISING THEREOF The present invention relates an output buffer and a power amplifier having the same. The output buffer includes a push-pull circuit unit, an output unit, and a driver. The push-pull circuit unit includes transistors connected to each others in a push-pull formation bet... | 02/05/2009 |
| 20090002070 | METHODS AND APPARATUS TO CONTROL RAIL-TO-RAIL CLASS AB AMPLIFIERS In one example, an amplifier for providing stable output quiescent current comprising includes a number of supply rails, an output device configured for providing an output voltage, the output device coupled to the plurality of supply rails, and an output quiescent curr... | 01/01/2009 |
| 20080284515 | CIRCUITS FOR QUIESCENT CURRENT CONTROL A circuit capable of quiescent current control, the circuit comprising a first operational transconductance amplifier (OTA) including a first output terminal, a first transistor including a first gate coupled to the first output terminal of the first OTA, a second OTA i... | 11/20/2008 |
| 20080174369 | 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 fir... | 07/24/2008 |
| 20080001668 | IMPEDANCE CONTROL DEVICE AND IMPEDANCE CONTROL METHOD A compact semiconductor device for controlling impedance is provided. The semiconductor device has: a replica transistor of a transistor included in a control target circuit; and a substrate bias control circuit for controlling the impedance of the control target circui... | 01/03/2008 |
| 20070159255 | High output current buffer A bipolar high output current buffer is disclosed using a negative feedback current mirror to supply the base drive to an output transistor. Small quiescent currents are used wherein the buffer demonstrates low quiescent power dissipation. The current mirror supplies th... | 07/12/2007 |
| 20070109052 | 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 by a ... | 05/17/2007 |
| 20060226909 | Monolithic supply-modulated rf power amplifier and dc-dc power converter ic Embodiments of RF power amplifiers are disclosed that include switched-mode power amplifiers supplied by synchrnous buck DC-DC converters. The switched-mode power amplifiers can be used to amplify a limited form of an RF input signal and the supply to the switched-mode ... | 10/12/2006 |
| 20060208800 | Biasing stage for an amplifier An amplifier biasing stage includes a transistor that provides a biasing signal for a complementary pair of field-effect transistors included in an output stage of an amplifier. The amplifier biasing stage also includes one resistive element connected to an emitter of t... | 09/21/2006 |
| 20060186958 | High efficiency linear amplifier A linear amplifier is configured with a current-feedback amplifier followed by a voltage-feedback amplifier to drive a totem-pole output stage. The output stage includes a series arrangement of an npn transistor and a pnp transistor with their emitters coupled in series... | 08/24/2006 |
| 20060077008 | 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 biased an... | 04/13/2006 |
| 20060012433 | Amplifier with a voltage-controlled quiescent current and output current An amplifier capable of controlling the magnitudes of quiescent and output current, using externally supplied voltages. The amplifier includes: an input circuit converting a voltage difference between input signals into a current; an output circuit outputting an output ... | 01/19/2006 |
| 20050270102 | Power amplifying apparatus A push-pull amplifier comprising at least one pair of transistors wherein the transistors comprising the pair of transistors are transistors having a control terminal, a first terminal, and a second terminal, and the current that flows between the first terminal and the... | 12/08/2005 |
| 20050264358 | 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), a ... | 12/01/2005 |
| 20050179496 | Operational amplifier An operational amplifier that decreases idling current, widens a voltage output range, and increases load driving capacity. The operational amplifier includes a first output transistor connected to a high potential power supply. A second output transistor is connected b... | 08/18/2005 |
| 20050012552 | SYSTEM AND METHOD FOR IMPROVED BIAS MATCHING Systems and methods to improve bias matching (e.g., for a current feedback amplifier) are described. A compensation signal is combined with one or more bias signals to mitigate mismatch between the bias signals. The compensation signal is generated to correspond to the ... | 01/20/2005 |
