Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8190107 | Measurement systems with envelope pre-detection An RF measurement system includes an envelope detector to extract the modulation envelope of the RF input signal. The resulting baseband envelope signal is then applied to a statistics extraction circuit which provides a precise measure of the modulation envelope. T... | 05/29/2012 |
| 8183933 | High-voltage impulse amplifier A circuit includes a first transistor in a common-collector configuration and a heterojunction bipolar transistor (HBT) in a common-emitter configuration. The first transistor has a base coupled to an input node for receiving a pulsed signal. A collector of the firs... | 05/22/2012 |
| 8183917 | RF power amplifier circuit with mismatch tolerance A radio frequency (RF) power amplifier system adjusts the supply voltage provided to a power amplifier (PA) adaptively, responsive to the measured or estimated power of the RF output signal of the PA. The RF PA system includes a power amplifier (PA) which receives a... | 05/22/2012 |
| 8179197 | Electronic circuits including a MOSFET and a dual-gate JFET Electronic circuits and methods are provided for various applications including signal amplification. An exemplary electronic circuit comprises a MOSFET and a dual-gate JFET in a cascode configuration. The dual-gate JFET includes top and bottom gates disposed above ... | 05/15/2012 |
| 8174312 | Apparatus and method for signal processing of voltage signals from electrodes of a magneto-inductive, flow measuring device Signal processing circuit for voltage signals from electrodes of a magneto-inductive, flow measuring device, wherein two measuring electrodes are connected with a fully differentially working amplifier having two inputs and two outputs. ... | 05/08/2012 |
| 8174314 | Aparatus and a method for processing and amplifying a signal A method and an apparatus. The apparatus includes at least one sensor for sensing at least one parameter that affects a non-linearity of the non-linear amplifier and for generating at least one parameter indicator; a memory module for storing multiple sets of pre-di... | 05/08/2012 |
| 8164382 | Concept, method and apparatus of improved distortion switched-mode amplifier Systems and methods for switched-mode amplifiers having improved harmonic distortion are disclosed. High order in-band filtering is enabled without undue trade-off of distortion due to intermodulation/aliasing. A pre-modulation block is introduced, deployed between ... | 04/24/2012 |
| 8164381 | Open-loop line driver control method and apparatus According to an embodiment, a circuit includes an amplifier and an open-loop control system. The amplifier has an output stage for amplifying a signal, a power supply for driving a supply voltage of the output stage to different voltage levels responsive to being mo... | 04/24/2012 |
| 8159304 | Apparatus and method for feed-forwarding in a current-feedback amplifier A current-feedback amplifier with at least one feed-forward capacitor at the input stage of the current-feedback amplifier is provided. In one embodiment, the current-feedback amplifier and feed-forward capacitor(s) are arranged as follows. The input stage includes ... | 04/17/2012 |
| 8159295 | Supply-modulated RF power amplifier and RF amplification methods An embodiment of the invention is a method of generating a reduced bandwidth envelope signal VDD(t) for the power supply modulator of an RF amplifier. An envelope signal of an RF amplifier input Venv(t) is low pass filtered. The filtered envelo... | 04/17/2012 |
| 8159296 | Method and apparatus for a power supply modulator linearizer A method and apparatus for a power amplifier module is described. The module includes a power amplifier and a power supply modulator coupled to the power amplifier. In addition, the module includes an inverter coupled between the power amplifier and the power supply... | 04/17/2012 |
| 8159297 | Transmission device, distortion compensation device, and distortion compensation method A transmission device includes an amplifier that amplifies a transmission signal according to a voltage to be applied, an envelope detector that detects an envelope signal of the transmission signal, a rate decreasing unit that decreases changing rate of the envelop... | 04/17/2012 |
| 8154337 | Apparatus and method for automated offset reduction in matched differential input devices An amplifier includes an input stage, a comparator coupled to an output of the differential input stage, and a trimming controller coupled to an output of the comparator. The input stage includes a plurality of trim devices coupled in parallel with a first input dev... | 04/10/2012 |
| 8149053 | Low noise amplifier The present invention relates to a low noise amplifier comprising a transformer, a first amplifier and a feedback resistor, the transformer comprising a primary stage and a secondary stage. The secondary stage is connected to the input of the first amplifier and the... | 04/03/2012 |
| 8149055 | Semiconductor integrated circuit device A semiconductor integrated circuit device constituting an inverting amplifier employs a cascode current source as a current source. In the semiconductor integrated circuit device, a high-potential-side transistor of the cascode current source and a low-potential-sid... | 04/03/2012 |
| 8149049 | Low noise receiving apparatus A low noise receiving apparatus includes an amplifier which inputs an input signal, an output matching circuit which is connected between the amplifier and an output terminal which matches an impedance of an output side of the amplifier, a bypass circuit which bypas... | 04/03/2012 |
| 8138837 | Efficient power amplifier A dynamic power supply for N amplifiers includes first and second power boost circuits which temporarily boost the positive or negative power supply rail, respectively. A control circuit monitors amplifier output signal levels and provides power boost control signal... | 03/20/2012 |
| 8102208 | Signal amplifier A signal amplifier controls an output amplitude of a differential transmitted from an amplifier circuit to two output terminals via each of 2N number of MOS transistors that operate as a switch by switching a control value n, and includes an amplitude-control-word s... | 01/24/2012 |
| 8098098 | Amplifier circuit, integrated circuit device, and electronic instrument An amplifier circuit includes an amplifier section that includes a P-type differential section, an N-type differential section, and an output section, an offset adjustment section that adjusts an offset of the amplifier section, a first offset adjustment register th... | 01/17/2012 |
| 8098093 | Efficient envelope tracking power supply for radio frequency or other power amplifiers An apparatus includes an envelope tracking power supply configured to control a power amplifier. The power supply includes a first amplifier configured to receive an input voltage and generate a supply voltage for the power amplifier. The power supply also includes ... | 01/17/2012 |
| 8093951 | Pulse-width modulated (PWM) audio power amplifier having output signal magnitude controlled pulse voltage and switching frequency An audio switching power amplifier having an output pulse voltage selected in conformity with an indication of the output signal amplitude provides lower electromagnetic interference (EMI) in class-D amplifier implementations, in particular, in inductor-less designs... | 01/10/2012 |
| 8093952 | Method and system for precise current matching in deep sub-micron technology Aspects of a method and system for precise current matching in deep sub-micron technology may include adjusting a current mirror to compensate for MOSFET gate leakage currents by using feedback circuits. The feedback circuits may be implemented from active component... | 01/10/2012 |
| 8076971 | Sampling frequency reduction for switching amplifiers The present invention is directed toward providing a system and method of reducing RF interference in switching amplifiers without degrading performance. In one embodiment, the sampling rate of coarse high voltage modulated pulsewidths are decreased relative to the ... | 12/13/2011 |
| 8072261 | Power amplifier A power amplifier based on EER technology or ET technology extracts an amplitude-modulated component from a modulated signal as an input signal which includes the amplitude-modulated component and a phase-modulated component, and decomposes the amplitude-modulated c... | 12/06/2011 |
| 8072264 | Amplifying device The present invention concerns a composite amplifier and a method for controlling the amplitude of a composite amplifier in a node of a wireless communication system. The composite amplifier comprises a first amplifier and a second amplifier that are arranged to be ... | 12/06/2011 |
| 8067985 | Resonant operating mode for a transistor The PN junctions of a transistor are biased for operation in the active mode but an initial flow of current reverses the bias of the base-emitter junction causing the transistor to conduct a resonant current with a voltage less than the forward junction voltage of s... | 11/29/2011 |
| 8063701 | System for reducing distortion in an electronic circuit using nonlinear feedback System and methods for reducing third harmonic distortion produced by nonlinear amplifiers are disclosed. A system may include an amplifier circuit with an amplifier transistor such that the amplifier is capable of exhibiting an amplifier output signal containing th... | 11/22/2011 |
| 8063699 | Anti-pop circuit Presently many audio chips suffer from pop issues, which is especially serious for single ended audio drivers. An audio pop is a disturbance in the output caused by a sudden transition of chip power, particularly when a chip is powered on or powered off. Furthermore... | 11/22/2011 |
| 8054127 | Feedforward distortion compensation amplifier A feedforward distortion compensation amplifier includes an adjusting unit for adjusting a gain and a phase of an input signal, a first amplifier for amplifying a signal outputted from the adjusting unit, a delay unit for delaying the input signal, and a coupler for... | 11/08/2011 |
| 8049561 | Class D amplifier The invention refers to an amplifier (1) comprising a switchable capacitive divider (10) for dividing a supply voltage delivered to the amplifier (1), the switchable capacitive divider being coupled to a coupling circuit (15) via a first ... | 11/01/2011 |
| 8049565 | Multi-mode high efficiency linear power amplifier A power amplifier includes a plurality of amplification paths in which at least one amplification path is selectively enables and disabled, wherein each amplification path includes an output impedance modification element and a phase shift element that is operable i... | 11/01/2011 |
| 8040187 | Semiconductor integrated circuit device A semiconductor integrated circuit device constituting an inverting amplifier employs a cascode current source as a current source. In the semiconductor integrated circuit device, a high-potential-side transistor of the cascode current source and a low-potential-sid... | 10/18/2011 |
| 8040183 | Turn-on/turn-off snubber for a metallic-oxide-semiconductor field-effect transistor (MOSFET) class-D power amplifier The present invention is an H-bridge power amplifier circuit which includes diodes connected in parallel with MOSFET switch pairs of the circuit, each MOSFET switch pair including a MOSFET switch and a reverse-conduction blocking switch. Further, the circuit include... | 10/18/2011 |
| 8026766 | Power circuits for power amplifiers and communication systems using the same A power circuit for a power amplifier which operates in an inactive period and an active period is provided and includes a power supply unit, a current limiting unit, a storage unit, and a converting unit. The power supply unit provides a first current. The current ... | 09/27/2011 |
| 8018281 | Method and device for performing offset cancellation in an amplifier using floating-gate transistors An operational amplifier including: a differential pair of transistors coupled to a pair of input signals; and a pair of floating-gate transistors coupled to the differential pair of transistors, wherein the pair of floating-gate transistors are operable for reducin... | 09/13/2011 |
| 8013677 | One-sided switching pulse width modulation amplifiers One-sided pulse width modulated (PWM) amplifiers are disclosed. An example amplifier includes an integrator to receive first and second analog signals, and to output a first amplified signal and a second amplified signal based on the first and second analog signals,... | 09/06/2011 |
| 7994853 | Class-D amplifier with dual feedback loop A class-D amplifier with dual feedback loop scheme has a gain adjusting circuit, a second-order integrator, two comparators, a logic circuit and an output driver. Two differential output terminals of the class-D amplifier are connected to two differential amplifiers... | 08/09/2011 |
| 7982535 | AMP output protective circuit for LCD panel source driver An AMP output protective circuit for an LCD panel source driver is disclosed. To solve a problem that internal diodes of PMOS/NMOS of an AMP output circuit are turned on, embodiments are characterized in making input and output voltages of the AMP in a charge sharin... | 07/19/2011 |
| 7463089 | Class D audio power amplifier for mobile applications A fully differential class D amplifier is provided. The class D amplifier includes an active amplifier in the feedback path of the modulator. In one embodiment, the class D amplifier includes a fully differential amplifier as an input buffer, in which a supply-indep... | 12/09/2008 |
| 7444360 | Method, system, and program for storing and using metadata in multiple storage locations Provided are a method, system, and program for storing and using metadata in multiple storage location. Signature data is stored in a system storage indicating a plurality of metadata copy locations, each locating identifying a storage device and a copy location wit... | 10/28/2008 |
