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"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 8169249 | Calibrating a system by setting difference between signals In a signal monitoring system, a circuit includes an input terminal and an output terminal. In addition, a processor coupled to the circuit is operable for calculating a parameter indicative of an error factor of the circuit by setting a level difference between an ... | 05/01/2012 |
| 8149041 | High-resolution parametric signal restoration Provided are high-resolution parametric signal restoration systems, and applications thereof. Such systems include a multi-output module and a parametric compensator. The multi-output module provides a reference gain output signal and one or more higher gain output ... | 04/03/2012 |
| 8098087 | Method and apparatus for standby voltage offset cancellation A method and apparatus is provided for standby voltage offset cancellation at inputs to a comparator within a receiver channel. Each of a first comparator input and second comparator input is isolated from an input signal such that each of the first and second compa... | 01/17/2012 |
| 7969222 | Method and system for DC offset correction loop for a mobile digital cellular television environment Methods and systems for a DC offset correction loop for a mobile digital cellular television environment are disclosed. Aspects of one method may include removing at least a portion of a DC offset from output of an amplifier. The DC offset may be removed from a sing... | 06/28/2011 |
| 7940105 | High-resolution parametric signal restoration Provided are high-resolution parametric signal restoration systems, and applications thereof. Such systems include a multi-output module and a parametric compensator. The multi-output module provides a reference gain output signal and one or more higher gain output ... | 05/10/2011 |
| 7924079 | Baseline restore based on diode star configuration and transformer coupling A simple, low cost circuit with only passive components, and thus low power consumption, is provided for baseline restoration of an AC coupled signal. The circuit includes a passive network of diodes arranged in a star configuration and an RF-transformer. A differen... | 04/12/2011 |
| 7920010 | Signal isolators using micro-transformers A logic signal isolator comprising a transformer having a primary winding and a secondary winding; a transmitter circuit which drives said primary winding in response to a received logic signal, such that in response to a first type of edge in the logic signal, a si... | 04/05/2011 |
| 7920009 | Method and device for comparator offset cancellation A method and a device for canceling an offset voltage in an output of a comparator circuit include sampling a set of offset voltages; applying a set of correction voltages equal in magnitude and opposite in polarity to the set of offset voltages, the set of correcti... | 04/05/2011 |
| 7911254 | Offset correction device and method A direct-current-offset correction device includes a digital-to-analog converter that converts a digital signal into an analog signal, a modulator that modulates the analog signal to generate a modulated signal, a direct-current-offset correction value calculation u... | 03/22/2011 |
| 7902900 | Limiting amplifiers A limiting amplifier with an input stage with dc offset cancellation, identical gain stages, an output buffer and a feedback filter. The input stage receives a differential input signal and outputs a first intermediate differential signal. The gain stages are cascad... | 03/08/2011 |
| 7898313 | Signal offset cancellation Techniques and circuitry are provided for programmably controlling signal offsets in integrated circuitry. In one embodiment, an integrated circuit includes a signal offset cancellation circuit that is programmably selected to control the offset of signals on either... | 03/01/2011 |
| 7880525 | Signal processing device having a variable current source A signal processing device suppresses a DC offset without omission of a low-frequency component of a signal in a receiver in a direct conversion system. The signal processing device includes an input terminal 29, a gain amplifier 31 that amplifies an i... | 02/01/2011 |
| 7843245 | Reference voltage generating circuit and offset-compensated current-voltage converting circuit using the same There is provided a reference voltage generating circuit generating a reference voltage to be applied to a current-to-voltage converting circuit in order to compensate for an offset voltage of the current-to-voltage converting circuit converting an input current int... | 11/30/2010 |
| 7825714 | Offset nulling for decreasing offset between currents in a differential signaling system Systems and methods for nulling offsets in differential signaling systems are described. A first circuit may be configured to sense the difference between a first differential current and a second differential current and provide a sense signal to an adjustment circ... | 11/02/2010 |
| 7816968 | Signal-processing circuit, in particular operating as a rectifier and peak detector, with active elements and differential inputs A signal-processing circuit has a first and a second input, which receive a first and a second differential signal, a third input, which receives a common-mode signal, the first and second differential signals having an equal and substantially opposite trend with re... | 10/19/2010 |
| 7795944 | Low-offset input circuit including amplifier circuit to correct circuit characteristics to cancel offset of the input circuit In a signal transmission system where an influence of the circuit characteristic variation of an input circuit on signal receiving operation cannot be ignored, there is provided a method of realizing a low-offset input circuit which is capable of conducting high-spe... | 09/14/2010 |
| 7791395 | DC offset correcting device and DC offset correcting method A signal generator generates a test signal including a positive signal and a negative signal which have the same amplitude. The signal generator corrects a DC level of the test signal based on a DC offset correcting signal supplied thereto, and supplies the correcte... | 09/07/2010 |
| 7777546 | DC offset calibration apparatus and method for differential signals A DC offset calibration apparatus includes a first adjustment unit, a first offset calibration circuit, a second adjustment unit, and a second offset calibration circuit. The first adjustment unit adjusts a first input signal to generate a first output signal accord... | 08/17/2010 |
| 7760003 | Controllable resistive circuit for providing a continuous variable resistance The present invention sets forth a controllable resistive circuit which comprises a transistor, a capacitor, a charging unit and a discharging unit. The transistor is capable of providing a variable resistance which is controlled to vary continuously and smoothly. T... | 07/20/2010 |
| 7755411 | DC current reduction circuit A DC current reduction circuit of the present invention that reduces a DC component in an output current of a current output element in which an AC current and a DC current are superimposed includes a low-pass filter for extracting a current component of a frequency... | 07/13/2010 |
| 7737753 | Method and device for adjusting or setting an electronic device Method and device for adjusting or setting an electronic device (1) exhibiting at least one input for an external input signal and at least one output signal output, the value or the state of the output signal being a function of the values or of the state of... | 06/15/2010 |
| 7710180 | Signal offset cancellation Techniques and circuitry are provided for programmably controlling signal offsets in integrated circuitry. In one embodiment, an integrated circuit includes a signal offset cancellation circuit that is programmably selected to control the offset of signals on either... | 05/04/2010 |
| 7636003 | Limiting amplifiers A limiting amplifier with an input stage with dc offset cancellation, identical gain stages, an output buffer and a feedback filter. The input stage receives a differential input signal and outputs a first intermediate differential signal. The gain stages are cascad... | 12/22/2009 |
| 7612600 | DC offset calibration apparatus and method A DC offset calibration apparatus is disclosed. The DC offset calibration apparatus includes an adjustment circuit and an offset calibration circuit. The adjustment circuit is utilized for receiving an input signal and an offset calibration signal, and for adjusting... | 11/03/2009 |
| 7592848 | Offset adjusting apparatus An offset adjusting apparatus adjusting an offset of an output signal output from an output terminal of an operational amplifier including one input terminal to which an input signal is to be input via a first resistor and the other input terminal to which a referen... | 09/22/2009 |
| 7560969 | Receiver of high speed digital interface A receiver of a high speed digital interface includes at least one differential amplifier, a pair of resistive elements, a current source and a pair of transistors. The differential amplifier receives a small differential signal at a pair of input terminals and outp... | 07/14/2009 |
| 7554376 | Offset correcting method, offset correcting circuit, and electronic volume An offset correcting circuit includes: an amplifying unit including an offset adjusting unit that adjusts an offset of the amplifying unit; and an offset determining unit that that detects the offset of the amplifying unit outputs a signal for correcting the offset ... | 06/30/2009 |
| 7541856 | Baseline wandering correction device and related method The invention discloses baseline wandering correction techniques. A baseline wandering correction device comprises a differentiator differentiating a data signal to generate a differentiated signal, a operation signal coupling to the differentiator and proceeding wi... | 06/02/2009 |
| 7538595 | DC offset canceling circuit The present invention provides a $ for canceling DC offset, comprising: a first circuit accumulating a first square value of a plurality of signal values in a time period; a second circuit calculation a second square value of an accumulation of said signal values in... | 05/26/2009 |
| 7525365 | System and method for providing an offset voltage minimization circuit A system and method is disclosed for providing an offset voltage minimization circuit for an amplifier circuit. The present invention comprises a flip flop zero amplifier circuit that is capable of operating in a first configuration during a first period of time to ... | 04/28/2009 |
| 7525366 | Offset compensation using non-uniform calibration Methods and systems for offset compensation using calibration are provided. Embodiments enable offset compensation using non-uniform calibration. Embodiments enable calibration schemes configurable according to the probability distribution function (PDF) of the rand... | 04/28/2009 |
| 7514978 | Terminated input buffer with offset cancellation circuit A system and method for compensation of offset voltage in a digital differential input buffer driven by a terminated transmission line. Offset compensation currents are injected at the output of the first stage of the input buffer, which has a higher impedance than ... | 04/07/2009 |
| 7511549 | Compact high-speed, high-resolution comparator structure Methods and circuits for performing high-speed, high-resolution signal comparisons using offset cancellation, reduction of charge injection noise, and sharing of coupling capacitors between circuit stages. A multistage comparator circuit includes first and second pr... | 03/31/2009 |
| 7501873 | Digitally controlled threshold adjustment circuit Embodiments of threshold adjustment circuits are disclosed. An example circuit includes a first differential pair of first and second thin oxide transistors. The first and second thin oxide transistors decrease a DC voltage component of a first and/or second compone... | 03/10/2009 |
| 7453305 | Voltage level shifting circuit, a differential input stage circuit, and a method for providing a level shifted differential signal to a differential input buffer circuit A voltage level shifting circuit (5) for shifting the common mode voltage of a differential signal to be within the working range of a differential input buffer circuit (3) comprises a first resistive voltage divider circuit (18) coupled between... | 11/18/2008 |
| 7453306 | Pulse shaping circuit The invention relates to a pulse shaping circuit for shaping electrical pulses driving an optical transmitter, e.g. a lased diode or an LED, and for providing electrical pulses having independently height and width-adjustable peaking at the edges thereof. The pulse ... | 11/18/2008 |
| 7443941 | Method and system for phase offset cancellation in systems using multi-phase clocks A system for use with a multi-phase clock generator is disclosed. It should also be understood that the multiphase clock generator can be a phase lock loop (PLL), delay lock loop (DLL), or any other circuit capable of providing a multiphase clock. The system compris... | 10/28/2008 |
| 7444268 | Method and apparatus for identifying a drift in a quantized signal in a computer system One embodiment of the present invention provides a system that identifies a drift in a signal in a computer system. During operation, the system receives a sequence of quantized signal values of the signal. Next, the system generates a statistical distribution based... | 10/28/2008 |
| 7436236 | Analog DC compensation Arrangement for analog compensation of a DC component in an AC signal having an estimator for producing an estimate corresponding to the DC component, a compensator for producing a present compensating signal according to the estimate, an adder for adding the presen... | 10/14/2008 |
| 7423479 | Offset canceller for compensating for offset in signal output An offset canceller outputs a signal during its offset compensating operation and compensates for the offset by capacitance or resistance devices connected externally to an operational amplifier. A driving circuit includes plural output circuits #1 to #n+1 fo... | 09/09/2008 |
