U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 5285430

Behavior Modification Wristwatch

A wristwatch including a watch band and a watch body having an octagon shaped perimeter and being red in color and having the word STOP thereon to resemble a stop sign.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 330/69 - SUM AND DIFFERENCE AMPLIFIERS


Subclass of Class 330 - Amplifiers
Definition: Subject matter including at least two sources of signal
No. of applications: 76
Last issue date: 05/24/2012


1    
Application No.Application TitleIssue Date
20120126888Differential Output Inductor for Class D Amplifier
A circuit includes a first input terminal for receiving a first pulsed voltage and a second input terminal for receiving a second pulsed voltage. The circuit further includes a load and an LC filter. The LC filter includes a coupled inductor pair that includes a first w...
05/24/2012
20120049959HIGH POWER-SUPPLY REJECTION RATIO AMPLIFYING CIRCUIT
The embodiments of the present invention disclose a high power-supply rejection ratio (PSRR) amplifier circuit. The amplifier circuit comprises a low dropout regulator, a negative charge pump and an amplifier. The output voltages of the negative charge pump and the low ...
03/01/2012
20120046004High performance transmitter preamplification chain with calibration feedback
According to one embodiment, an improved preamplification chain for implementation in a transmitter comprises a frequency conversion stage for up-converting a baseband signal to a transmit signal, a variable gain control power amplifier driver for preamplifying the tran...
02/23/2012
20110268289GROUND LOOP NOISE REJECTION FOR A HEADSET SUBSYSTEM
For headphone subsystems that employ common ground switches for speaker outputs (for example), there can be a significant issue with cross-talk and ground noise. Here, configurations for an amplifier and switch network are provided, which generally cancel noise from the...
11/03/2011
20110267144NOISE-CANCELING FOR DIFFERENTIAL AMPLIFIERS REQUIRING NO EXTERNAL MATCHING
A differential Low Noise Amplifier (LNA) includes a first stage of resistive feedback amplifiers and second stage of complementary amplifiers, where the outputs of the first stage are coupled to the inputs of the second stage in a cross-coupled fashion. An inductive loa...
11/03/2011
20110260788AMPLIFIER DEVICE AND SENSOR MODULE
A first low-pass filter circuit includes a first input terminal which receives a sensor signal, a second input terminal, and an output terminal which outputs a first output signal. A second low-pass filter circuit includes an input terminal connected to the second input...
10/27/2011
20110241770AMPLIFIER FOR PROCESSING DIFFERENTIAL INPUT USING AMPLIFIER CIRCUITS WITH DIFFERENT DRIVING CAPABILITIES AND/OR DIFFERENT FREQUENCY COMPENSATION CHARACTERISTICS
An amplifier processes a differential input received at a differential input port. The amplifier includes a first amplifier circuit and a second amplifier circuit. The first amplifier circuit is disposed in a first signal path between a first input node and a first outp...
10/06/2011
20110221521Active Eye Opener for Current-Source Driven, High-Speed Serial Links
A current boost circuit acts as an “eye opener” for a digital bus line. A controlled current injects a fraction of the normal signaling current magnitude from a source driver onto the bus line, after a transition between the two logical states on the bus line is det...
09/15/2011
20110204971DIFFERENTIAL VOLTAGE SENSING SYSTEM AND METHOD FOR USING THE SAME
A differential voltage sensing method for achieving input impedance matching comprises the steps of: providing a first bio-potential signal to a first variable resistor for generating a first signal; providing a second bio-potential signal to a second variable resistor ...
08/25/2011
20110169565Receiving circuit
A receiving circuit in accordance with an exemplary aspect of the present invention includes a first voltage-dividing circuit that outputs a first input signal obtained by voltage division of one of differential signals based on the resistance ratio between first and se...
07/14/2011
20110156811VOLTAGE DETECTION DEVICE
A voltage detection circuit includes operational amplifiers, a battery, and a voltage circuit. The voltage circuit offsets the inverting input terminals and non-inverting input terminals of the operational amplifiers to the positive side with reference to a ground GND....
06/30/2011
20110115565CASCADED AMPLIFIERS WITH TRANSFORMER-BASED BYPASS MODE
Cascaded amplifiers with a transformer-based bypass mode are described. In an exemplary design, an apparatus includes first and second amplifiers and a circuit. The first amplifier (e.g., a driver amplifier) provides amplification in a high gain mode and a bypass mode. ...
05/19/2011
20110080214OUTPUT AMPLIFIER CIRCUIT AND DATA DRIVER OF DISPLAY DEVICE USING THE CIRCUIT
An output amplifier includes a differential stage having a reference voltage supplied to a first input, a first output stage that receives an output of the differential stage, a second output stage whose output is connected to a load, a capacitor element having a first ...
04/07/2011
20110068862FEEDBACK AMPLIFIER AND FEEDBACK AMPLIFICATION METHOD
A feedback amplifier comprises a differential amplifier equipped with differential input terminals and differential output terminal and a first amplifier, wherein the differential output terminal is connected to input terminal of the first amplifier, wherein output term...
03/24/2011
20110043278METHOD AND APPARATUS FOR BIASING AN AMPLIFIER
An apparatus and method for biasing each amplifier of an amplification stage provides that the voltage across each current sensing element of each amplifier of the amplification stage is measured. For each pair of voltage measurements taken, a sum and difference is calc...
02/24/2011
20110001649Differential chopper comparator and A/D converter including the same
A differential chopper comparator compares an input signal voltage and a first voltage, and includes a first capacitor, a second capacitor, and a differential amplification unit including a differential amplification circuit. Either the input signal voltage or the first...
01/06/2011
20100321002INTEGRATED SENSOR WITH CAPACITIVE COUPLING REJECTION TO THE MECHANICAL GROUND
An integrated sensor includes: i) a voltage regulator coupled with a mechanical ground and delivering a regulated voltage based on a primary power supply voltage referencing an electrical ground; ii) a high-impedance sensitive element powered by the primary power supply...
12/23/2010
20100312080REGIONAL OXIMETRY ANALOG FRONT END
An apparatus includes a first amplifier having a first input coupled to a first optical detector. The first amplifier includes a first output corresponding to a logarithm of the first input. The apparatus includes a second amplifier having a second input coupled to a se...
12/09/2010
20100301932NON-INVERTING AMPLIFIER AND VOLTAGE SUPPLY CIRCUIT INCLUDING THE SAME
A non-inverting amplifier includes an operational amplifier, an input resistor, and a feedback resistor. The operational amplifier amplifies and outputs a difference between an input voltage and a voltage of a control node. The input resistor is connected between a refe...
12/02/2010
20100302385ANGULAR VELOCITY SENSOR, AMPLIFICATION CIRCUIT OF ANGULAR VELOCITY SIGNAL, ELECTRONIC APPARATUS, SHAKE CORRECTION APPARATUS, AMPLIFICATION METHOD OF ANGULAR VELOCITY SIGNAL, AND SHAKE CORRECTION METHOD
An angular velocity sensor includes a sensor device and an amplification circuit. The sensor device generates a detection signal corresponding to an angular velocity. The amplification circuit generates both a first output signal by non-inverting amplifying the detectio...
12/02/2010
20100301917LEVEL SHIFT CIRCUIT
The invention provides a level shift circuit that prevents an offset when the supply voltage changes. A level shift circuit has a differential amplification circuit, a current generation circuit, a capacitor and a holding circuit. An input signal from the optical pickup...
12/02/2010
20100283538FREQUENCY OFFSET CARTESIAN FEEDBACK SYSTEM
An amplifier system providing improved Cartesian feedback is provided. A complex band pass error amplifier is provided. A quadrature up converter is connected to the complex band pass error amplifier so as to receive as input, output from the complex band pass error amp...
11/11/2010
20100283652SEMICONDUCTOR DEVICE AND DIFFERENTIAL AMPLIFIER CIRCUIT THEREFOR
A differential amplifier circuit comprising a differential amplifier capacitor and a mismatch error cancellation circuitry, a first pair of capacitors, a second pair of capacitors consisting of switching network. The switching network is arranged to operate in a first c...
11/11/2010
20100272294TWO-CHANNEL AMPLIFIER WITH COMMON SIGNAL
A two-channel amplifier with common signal including a splitter for establishing three intermediate signals on the basis of two input signals, wherein the three intermediate signals represent two channels, one of the three intermediate signals being a common signal comm...
10/28/2010
20100259324BROAD-BAND ACTIVE DELAY LINE
A broad-band active delay line comprises a plurality of broad-band active delay cells configured in a cascade topology. Each broad-band active delay cell comprises a feedback loop and a feedforward path to achieve a high bandwidth....
10/14/2010
20100259661AMPLIFYING CIRCUIT AND IMAGING DEVICE IMAGING DEVICE
This invention is an amplification circuit which limits increased power consumption and circuit surface area use and an imaging device including this amplification circuit. After initially discharging a capacitor, a signal charge corresponding to the difference between ...
10/14/2010
20100259323VARIABLE GAIN INSTRUMENTATION AMPLIFIER
Techniques for providing an instrumentation amplifier having a plurality of selectable gain settings. In an exemplary embodiment, a gain adjustment block for accepting a differential input voltage is coupled to a differential-to-single-ended conversion block for generat...
10/14/2010
20100253423DIFFUSED INTEGRATED RESISTOR
Methods and apparatus according to various aspects of the present invention may operate in conjunction with a resistor formed of a lightly-doped P-type region formed in a portion of a lightly-doped N-type semiconductor well extending on a lightly-doped P-type semiconduc...
10/07/2010
20100231294APPARATUS AND METHOD FOR SIGNAL PROCESSING OF VOLTAGE SIGNALS FROM ELECTRODES OF A MAGNETO-INDUCTIVE, FLOW MEASURING DEVICE BIER3004/FJD
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....
09/16/2010
20100207691PHASE MISMATCH COMPENSATION DEVICE
A phase mismatch compensation device comprises a first low pass filter unit, a second low pass filter unit and a phase compensation unit. The first low pass filter unit comprises a first input unit transferring the I-channel analog input signal to an input terminal of a...
08/19/2010
20100073083NESTED TRANSIMPEDANCE AMPLIFIER
A nested transimpedance amplifier circuit includes a first-order nested transimpedance amplifier having an input and an output. The first-order nested transimpedance amplifier is configured to be powered by a first voltage. A charge pump module is configured to receive ...
03/25/2010
20090284315OPERATIONAL AMPLIFIER
An operational amplifier includes, between an input and an output of an operational amplifier (an operational amplification stage) 10, a feedback capacitor 34 connected in negative feedback, a phase control circuit 100 having a resistor element (a r...
11/19/2009
20090273397Controlling power with an output network
In one embodiment, the present invention includes multiple gain stages and an output network coupled to the gain stages. Each of the gain stages can be independently controlled to amplify a radio frequency (RF) signal to an output power level for transmission from a mob...
11/05/2009
20090212857DC Self-Biased Vacuum Tube Differential Amplifier With Grid-to-Cathode Over-Voltage Protection
A single stage differential amplifier is disclosed as comprising a pair of vacuum tube triodes for amplifying two input signals and generating two output signals. The differential amplifier has DC self-biasing ability and grid-to-cathode over-voltage protection for dire...
08/27/2009
20090167432INSTRUMENTATION AMPLIFICATION WITH INPUT OFFSET ADJUSTMENT
In a single-ended or differential instrument amplifier, an input offset may be adjusted by driving current into the impedance of a feedback network of the amplifier. The amplifier may be provided with programmable gain capability. The impedance does not change with diff...
07/02/2009
20090128233SHARED LINEARITY MAINTENANCE IN POWER AMPLIFIERS
In some embodiments, a circuit includes a power amplifier including an input terminal configured to receive an input signal and an output terminal to provide an RF voltage, the output terminal coupled to a load, a current sensor configured to sense the current drawn by ...
05/21/2009
20090102484BANDWIDTH EXPANSION IN MAGNETIC RESONANCE
A magnetic resonance imaging system includes a primary magnet and a secondary magnet operable to produce magnetic fields within a sample being imaged. The MRI system further includes at least one RF coil that is operable to receive electromagnetic frequencies from the s...
04/23/2009
20080204133Circuits and apparatus to reduce transient output noise in an audio amplifier
Circuits and apparatus to reduce transient output noise in an audio amplifier are disclosed. A disclosed example apparatus comprises an amplifier, and an amplifier controller to digitally change a common-mode voltage of the amplifier to reduce an output noise of the amp...
08/28/2008
20080200128Twisted Pair Communication System, Apparatus and Method Thereof
A communication system comprises a twisted pair communication link operably coupled to at least two driver stages for providing at least two independent input signals on the twisted pair communication link. The at least two independent input signals on the twisted pair ...
08/21/2008
20080186092SHARED LINEARITY MAINTENANCE IN POWER AMPLIFIERS
In some embodiments, a circuit includes a power amplifier including an input terminal configured to receive an input signal and an output terminal to provide an RF voltage, the output terminal coupled to a load, a current sensor configured to sense the current drawn by ...
08/07/2008
1    
 
Sign InRegister
Username  
Password   
forgot password?