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| Number | Title | Issue Date |
| 7622963 | General purpose comparator with multiplexer inputs A circuitry comprises a comparator for comparing a signal received on a first input to a signal received on a second input. A control register associated with the first multiplexer stores control values enabling connection of one input of the first multiplexer to th... | 11/24/2009 |
| 7439780 | Chopper type comparator A comparator includes: a CMOS inverter constituted by a combination of a first p-channel MOS transistor and a first n-channel MOS transistor; a second p-channel MOS transistor connected in parallel to the first p-channel MOS transistor in an analog input period, and... | 10/21/2008 |
| 7358779 | Amplitude compensation circuit with programmable buffers According to one exemplary embodiment, an amplitude compensation circuit includes a first composite programmable buffer for receiving a first input signal with a first input amplitude. The amplitude compensation circuit further includes a second composite programmab... | 04/15/2008 |
| 7336122 | Low power high side current monitor which operates at high voltages and method therefor A low power high side current monitor has an input terminal and a load terminal. A current sensing element is coupled to the input terminal and the load terminal. A first resistor is coupled to the input terminal. A first pair of transistors is coupled together and ... | 02/26/2008 |
| 7315189 | Retiming circuits for phase-locked loops Circuits and methods for retiming a frequency-divided clock are provided. A first sampling circuit samples the frequency-divided clock with a rising edge of a sampling clock. A second sampling circuit samples the frequency-divided clock with a falling edge of the sa... | 01/01/2008 |
| 7292083 | Comparator circuit with Schmitt trigger hysteresis character A circuit and a method are provided to produce a novel comparator with Schmitt trigger hysteresis character. The circuit includes a current source which controls the magnitude of current flow through this comparator circuit. It has a first logic device which is turn... | 11/06/2007 |
| 7230461 | Retiming circuits for phase-locked loops Circuits and methods for retiming a frequency-divided clock are provided. A first sampling circuit samples the frequency-divided clock with a rising edge of a sampling clock. A second sampling circuit samples the frequency-divided clock with a falling edge of the sa... | 06/12/2007 |
| 7209108 | Differential drive circuit and method for generating an a.c. differential drive signal The differential drive circuit generates a differential drive signal having a root mean square value defined by a digital input value. The differential drive signal includes a first differential component and a second differential component. The circuit comprises a ... | 04/24/2007 |
| 7157924 | Method and apparatus for on-die voltage fluctuation detection An on-die device is provided to measure/detect voltage fluctuations. This may include a control unit to generate differential reference signals (such as differential current signals), a first detector unit and a second detector unit. The differential reference signa... | 01/02/2007 |
| 7123058 | Signal detecting circuit and method therefor A stable, low power consumption signal detecting circuit may include: a delay circuit, which receives a base clock signal and generates multiple versions thereof having time delay relationships thereto, respectively; dual amplifiers, which detect valid ones of input... | 10/17/2006 |
| 7053669 | Method for determining the beginning of a second in the signal of a time-signal transmitter A method for detecting the beginning of the dips of the amplitudes in the output signal of a time signal receiver identifying the beginning of a second in the time signal. The output signal of the receiver for the time signals is sampled N-times per second. The samp... | 05/30/2006 |
| 7034723 | Timing comparator, data sampling apparatus, and testing apparatus A data sampling apparatus includes plural stages of first variable delay elements for sequentially delaying a data signal by a first delay amount, plural stages of second variable delay elements for sequentially delaying a strobe signal by a second delay amount whic... | 04/25/2006 |
| 6995555 | Apparatus and method for determining a current through a power semiconductor component A circuit configuration includes a power switch and a measuring configuration for detecting the load current through the power switch. The circuit configuration utilizes a voltage drop across a connecting line, in particular a bonding wire, which is connected in ser... | 02/07/2006 |
| 6956410 | Automotive ignition system with battery dependent over-dwell protection A technique for reducing input currents associated with a comparator circuit during certain events includes minimizing bias currents associated with the comparator circuit when a magnitude of an input signal at a signal input of the comparator circuit is a predeterm... | 10/18/2005 |
| 6812790 | Signal read circuit In a signal read circuit including a plurality of circuit rows each having a charge amplifier connected to a photoelectric conversion element PD and a CDS circuit 2S for performing correlated double sampling for an output from the charge amplifier, a dummy ci... | 11/02/2004 |
| 6734706 | Circuit for driving a power device A driving circuit includes a level shift circuit that shifts and outputs the level of the main signals consisting of the “ON” and “OFF” signals that respectively instruct ON and OFF of the power device, a transmitter circuit that latches the main signals to ... | 05/11/2004 |
| 6674319 | Power down mode signaled by differential transmitter's high-Z state detected by receiver sensing same voltage on differential lines A power-down signal is encoded into a differential pair of lines between two chips. When the differential transmitter powers down, it enters a high-impedance state and floats the differential lines. A shunt resistor between a pair of differential lines eq... | 01/06/2004 |
| 6437607 | Non linear circuit for open load control in low-side driver type circuits Non linear circuit for open load control in Low-Side Driver type circuits, including at least two power transistors, scaled according to an area ratio 1 to M, with M>1, wherein the power transistor having the smaller area is controlled by a circuit input ... | 08/20/2002 |
| 6417699 | Comparator circuits A comparator circuit with comparing means for comparing first and second voltages, has current source circuitry for providing current to said comparing means, said current source circuitry having an input for receiving a clock signal having first and seco... | 07/09/2002 |
| 6384640 | Pulse generator for indicating a change in the magnitude of an input signal A pulse generator for indicating a change in the magnitude of an input signal includes a comparator, a first network connected to one input of the comparator for receiving the input signal, and a second network connected to the other input of the comparat... | 05/07/2002 |
| 6326817 | Circuit for suppressing a common mode component in a signal from a CAN communication bus The common mode component in the difference signal on the bus terminals (2, 4) of a CAN bus is counteracted by four transistors (M1-M4) connected between the supply terminals (28, 32) and a center tap (16) of a voltage divider (6A, 6B, 8, 10, 12A, 12B) be... | 12/04/2001 |
| 6166766 | Sensing circuit for capturing a pixel signal A sensing circuit (202) uses correlated double sampling to sample a first pixel signal of a pixel stream (VPIXEL) at two different times to produce a dark signal and a light signal on two capacitors (310, 314). The dark and light signals are am... | 12/26/2000 |
| 6133765 | Switched-current memory A switched current memory circuit has an input to which an input current (i) is applied and which is connected via a switch (S1) to the drain electrode of a memory transistor (M). A second switch (S3) is connected between the memory circuit input and the ... | 10/17/2000 |
| 6025875 | Analog signal sampler for imaging systems An analog signal sampler with improved correlated double sampling (CDS) performance for imaging systems includes a dual mode input amplifier, a switched capacitor network and a differential amplifier. The dual mode input amplifier has a high input impedan... | 02/15/2000 |
| 5968191 | Method and apparatus for testing integrated circuits in a mixed-signal environment A method and apparatus is disclosed for testing integrated circuit interconnect and measuring the value of passive component interconnecting the IC's. Each IC includes both analog and digital circuitry and is provided with a test access port and boundary ... | 10/19/1999 |
| 5923219 | Automatic threshold control circuit and signal amplifying circuit for amplifying signals by compensating for low-frequency response of photodetector An automatic threshold control circuit includes a bottom detection circuit, a relative peak detection circuit, and a voltage divider circuit. The bottom detection circuit detects an absolute minimum level of an input signal, and the relative peak detectio... | 07/13/1999 |
| 5920223 | Method and apparatus to improve immunity to common-mode noise The present invention provides a method and apparatus for improving immunity to common mode noise. The present invention prevents common mode noise from exceeding acceptable limits. The present invention is also useful to prevent common mode noise from be... | 07/06/1999 |
| 5834968 | Low pass filter A low pass filter comprises a complementary signal generator circuit for receiving an input pulse signal to output a first and a second signals having phases inverse to each other, a first CR circuit inputted with the first signal, a second CR circuit inp... | 11/10/1998 |
| 5832003 | Video error/distortion checker A video error/distortion checker generates a difference signal from an input repetitive digital signal and a reference data signal corresponding to the input repetitive digital signal. The difference signal is compared with maximum and minimum threshold v... | 11/03/1998 |
| 5703506 | Signal processing method A signal processing circuit (10) performs a sample and hold (16) of an input signal (14) and stores a maximum value of the input signal (18). A guardband signal (21) is developed that is less than the maximum value that is stored. The input signal is comp... | 12/30/1997 |
| 5661754 | Receiver arrangement An infrared remote-control receiver employs at its front end a gyrator-configured transistor operating as a current-to-voltage converter, but derives its data information from a negative-going gyrator output pulse in preference to the more conventionally ... | 08/26/1997 |
| 5638020 | Switched capacitor differential circuits A switched capacitor differential circuit switches first and second differential input signals (Vinp1, Vinp2) to respective inputs (A, B) of an operational amplifier (12) via respective first and second signal paths. Each signal path includes a coupling c... | 06/10/1997 |
| 5594350 | Signal detecting circuit for digital controller An instantaneous value of alternating current signal from an instrument potential transformer 10 or an instrument current transformer 9 is processed with an analog filter 21, 22, the frequency to be used for correction being detected with a frequency dete... | 01/14/1997 |
| 5546028 | Chopper type comparator for an analog-to-digital converter A chopper type comparator is disclosed and implements a differential configuration with inverter amplifiers each having a control terminal. The comparator, therefore, successfully cancels noise of the same phase while preventing a current from constantly ... | 08/13/1996 |
| 5459417 | Apparatus for detecting DC content of an AC waveform A circuit for monitoring the DC content of an AC waveform includes a differential amplifier having one input connected to the AC waveform and the other input connected to a capacitive-coupled network that eliminates any DC component in the AC waveform at ... | 10/17/1995 |
| 5050223 | Method of and apparatus for processing image signal A new image (S'ij) is generated from an image signal (Sij) by determining whether the configuration of the distribution of the image signal (Sij) at a point of interest (i, j) is upwardly convex, or a downwardly convex, or otherwise, employing, as the new... | 09/17/1991 |
| 4841451 | System for measuring the duration ratio of pulses of variable frequency In a system for measuring the duration ratio of pulses of variable frequency, particularly in electronically controlled fuel-injection systems for internal-combustion engines, there are derived clock pulses to the frequency of which a predetermined multip... | 06/20/1989 |
| 4713771 | Digital minimum-maximum value sequence processor In a system for generating a vector representation of a waveform on a cathode ray tube screen, the minimum and maximum magnitudes of an analog waveform acquired during each of successive measurement periods are stored in a random access memory, with the m... | 12/15/1987 |
| 4653073 | Low error rate digital demodulator An on-off keyed carrier signal is demodulated by quadrature sampling of the incoming carrier signal at twice carrier frequency to provide short term digital patterns indicating detection of an incoming signal of carrier frequency. A number of phase counti... | 03/24/1987 |
| 4573037 | Analog-to digital converter and method A system and method is provided for producing digital signals proportional to selected parameters of an input signal supplied to a modulator. The modulated output of the modulator is supplied to a delaying bistable circuit, and both the original output an... | 02/25/1986 |
