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| Number | Title | Issue Date |
| 8102191 | Window comparator circuit for limiting input voltage applied to object circuit Plurality of current mirror circuits CM1 to CM5 at which the same amount of current I1 flows in the circuits. Transistors Qa4/Qb5 are ON state when it is in the steady state. Transistors Qa5/Qb7 turn ON and transistor... | 01/24/2012 |
| 7956651 | Method for detecting a current and compensating for an offset voltage and circuit A method and circuit for detecting a current and compensating for an offset voltage. The circuit includes two comparators where one of the comparators has two input terminals and the other comparator has three input terminals. An input terminal of each of the two co... | 06/07/2011 |
| 7952394 | Signal receiver circuit capable of improving area and power efficiency in semiconductor integrated circuits A signal receiver circuit includes a first level detector for offset-controlling a first output node in response to a pair of first reference signals. A second level detector offset-controls a second output node in response to a pair of second reference signals.... | 05/31/2011 |
| 7852123 | Reset-free comparator with built-in reference A comparator circuit includes a bias stage, a first current source, a second current source, and a comparator stage. The bias stage includes a first input, a second input, an output that generates a bias voltage, and a first load, wherein differential reference volt... | 12/14/2010 |
| 7728633 | Window comparator of an A.C. voltage A window comparator of an A.C. input voltage, including, between two terminals of application of a voltage representative of the voltage to be measured, two first transistors of a first type, each first transistor being assembled as a current mirror on the second tr... | 06/01/2010 |
| 7724040 | Network overclock control circuit A network overclock control circuit for a computer includes an RC circuit, first and second comparator circuits, and first and second switch circuits. A signal pin of a network indicating lamp is connected to input terminals of the first and second comparator circui... | 05/25/2010 |
| 7719323 | Signal receiver circuit capable of improving area and power efficiency in semiconductor integrated circuits A signal receiver circuit includes a first level detector for offset-controlling a first output node in response to a pair of first reference signals. A second level detector offset-controls a second output node in response to a pair of second reference signals.... | 05/18/2010 |
| 7525349 | Circuit for classifying signals A circuit for classification of analog input signals, comprising an analog memory component, such as a floating gate, used to store a threshold value; a threshold detection module used to determine whether the analog input signal exceeds the threshold value; a time ... | 04/28/2009 |
| 7482844 | Analog-to-digital converter with programmable floating gate Systems and methods are discussed for using a floating-gate MOSFET as a programmable reference circuit. One example of the programmable reference circuit is a programmable voltage reference source, while a second example of a programmable reference circuit is a prog... | 01/27/2009 |
| 7479808 | Threshold circuit arrangement A method for operating a threshold circuit arrangement and a threshold circuit arrangement is disclosed. In one embodiment, the invention provides a threshold circuit arrangement, wherein a comparator circuit is configured to compare an input signal is compared with... | 01/20/2009 |
| 7477077 | Apparatus and method for loss of signal detection in a receiver An apparatus, device, and method for loss of signal detection in a receiver are provided. A reference circuit is operable to rectify a reference signal. An input circuit is operable to rectify an input signal. A comparator is operable to compare outputs of the refer... | 01/13/2009 |
| 7446575 | Capacitor charging methods and apparatuses that use a secure parallel monitoring circuit A capacitor charging circuit and method including a plurality of serially connected capacitors and parallel monitor circuits connected in parallel on a one-to-one basis to the capacitors. Each one of parallel monitor circuits applies a direct-current source voltage ... | 11/04/2008 |
| 7375559 | Differential comparator with a replica input stage to set the accurate bias current for improved common mode rejection Methods and apparatus for properly biasing differential comparators are provided. Using a feedback relationship, a bias for a main stage that receives a first differential input of the comparator is produced. Separately, a feedback relationship produces a bias for a... | 05/20/2008 |
| 7372683 | Over voltage detection circuit, and power source circuit, power supply system and electronic apparatus using the over voltage detection circuit An over voltage detection circuit, which is used in a power source, a power supply system, and an electronic apparatus, includes two voltage comparison circuits. A first comparison circuit, provided for high-speed signal responses, includes voltage dividing resistor... | 05/13/2008 |
| 7368945 | Logic circuit, timing generation circuit, display device, and portable terminal When a buffer is formed by using transistors having large element characteristic variations, the deviation of the timing between the input clock pulse and the reset pulse is likely to occur. When the deviation of the timing becomes larger, a malfunction is caused to... | 05/06/2008 |
| 7352167 | Digital trigger An improved digital trigger circuit has a plurality of data samples extracted from an input electrical signal for each sample clock cycle. The plurality of data samples are compared in parallel with a high threshold level and a low threshold level which provides hys... | 04/01/2008 |
| 7348836 | Integrated circuit core power supply event monitor An integrated circuit core power supply event monitor is disclosed. The integrated circuit core power supply event monitor includes a plurality of sub-circuit power supply event monitors. Each sub-circuit power supply event monitor includes a first input for receivi... | 03/25/2008 |
| 7340186 | Discrimination phase margin monitor circuit, transmitting/receiving device and communication system The discrimination phase margin monitor circuit (10) of the present invention comprises a first discrimination circuit (11 and 12) discriminating an input data signal using a clock signal extracted from the input data signal, a second discrimina... | 03/04/2008 |
| 7330065 | Inrush current slew control circuit and method Circuitry and methodology for controlling a FET or another transistor device provided to supply power to a circuit board insertable into a live backplane to provide inrush current slew rate control. The FET control circuit is responsive to an input signal variable i... | 02/12/2008 |
| 7313498 | Device and method for testing an electrical circuit A method and device for testing an electrical circuit, which do not require a thorough electrical circuit simulation but reliably identifying circuit faults. Preferred embodiments generate a fault signal that indicates that a given state of the circuit, which is def... | 12/25/2007 |
| 7282965 | Signal detection circuit capable of automatically adjusting threshold value The signal detection circuit of the present invention includes: a comparison section for comparing the absolute value of a voltage of an input differential signal with a threshold voltage corresponding to a first detection level adjustment signal to detect presence/... | 10/16/2007 |
| 7279960 | Reference voltage generation using compensation current method A reference voltage generator that may be useful in analog-to-digital converter (ADC) circuits includes compensation for errors such as from non-ideal considerations such as semiconductor processing variations, mismatch errors, temperature gradients, and parasitic e... | 10/09/2007 |
| 7271579 | AC signal level detection circuit An AC voltage generated by an AC power source 1 is rectified by a full-wave rectifying circuit 2, which generates a rectified voltage. An internal regulator 33 performs waveform shaping of the rectified voltage. A comparator 42 compares t... | 09/18/2007 |
| 7271636 | Hysteresis comparator and reset signal generator In some examples, a hysteresis comparator includes a series resistor portion including a plurality of resistors for dividing a power supply voltage, the series resistor portion generating a first midpoint voltage and a second midpoint voltage higher than the first m... | 09/18/2007 |
| 7268593 | Apparatus and method for single pin current-programmable multi-function/multi-purpose selector A circuit for providing an output current is provided. The circuit includes a differential amplifier, a transistor having a gate that is coupled to the output of the differential amplifier, a comparator, and a sense resistor that is coupled between the drain of the ... | 09/11/2007 |
| 7242223 | Clock frequency monitor A frequency monitor circuit (FMC) that is part of an integrated circuit chip for monitoring the frequency of one or more clocks present on the chip is disclosed. The FMC includes a reference window generator, operative to output a reference window signal of a given ... | 07/10/2007 |
| 7239125 | Method and apparatus for electronic meter testing An electronic energy meter senses input voltage and current signals and processes the input voltage and current signals to generate measurements of multiple types of power. The meter comprises a processing system for selecting one of the multiple types of power and ... | 07/03/2007 |
| 7233196 | Bandgap reference voltage generator An electrical circuit is disclosed that is capable of improving the power supply rejection ratio of a standard bandgap reference while maintaining the temperature coefficient of the standard design. One embodiment of the circuit comprises a bandgap reference voltage... | 06/19/2007 |
| 7233174 | Dual polarity, high input voltage swing comparator using MOS input transistors A differential input comparator circuit comprises an input stage comprising dual polarity input voltages and an output stage adapted to output a differential voltage based on the input voltages, wherein the differential voltage is adapted to be transmitted to a comp... | 06/19/2007 |
| 7233176 | CMOS input buffer and a method for supporting multiple I/O standards A CMOS input buffer supporting multiple I/O standards and having a pair of NMOS and PMOS differential receivers, each having a first input connected to an input pad and a second input connected to a reference voltage, a first multiplexer connected to the control ter... | 06/19/2007 |
| 7227407 | Integration and terminal arrangement of parallel monitor circuits Integration and terminal arrangement of serially-connected parallel monitor circuits, capable of monitoring the terminal voltages of serially-connected capacitors, are disclosed. A semiconductor device has a predetermined number of parallel monitor circuits, corresp... | 06/05/2007 |
| 7227399 | Detector of differential threshold voltage A differential threshold voltage level detection circuit receives a differential voltage pair as an input, applying each component of the differential pair to an individual voltage shifting circuit. Each voltage shifting circuit is configured with a regulated curren... | 06/05/2007 |
| 7215158 | Comparator switching apparatus and method An operation switching circuit switches over two comparators, which receives communication data, in accordance with a normal mode and a standby mode of a microcomputer. A delay circuit delays a mode switching signal. The mode switching signal and the delayed signal ... | 05/08/2007 |
| 7215143 | Input buffer for multiple differential I/O standards An input buffer circuit has a plurality of selectively enabled differential amplifier circuits, where each differential amplifier is configured for compatibility with a particular differential I/O standard and its corresponding input operating range. For example, th... | 05/08/2007 |
| 7212041 | Weighted multi-input variable gain amplifier A limiting amplifier (LIA), used for example in high speed optical communication systems, includes a loss of signal (LOS) feature that may provide improved optical receiver performance and includes wide range user-programmable thresholds for generating analog loss o... | 05/01/2007 |
| 7212043 | Line regulator with high bandwidth (BW) and high power supply rejection ration (PSRR) and wide range of output current Aspects of a method and system for a linear regulator with high bandwidth, PSRR, and a wide range of output current are provided. A method for isolating voltages in a circuit may comprise applying a reference voltage to an isolation resistor based on a supply voltag... | 05/01/2007 |
| 7196553 | Sensor signal detection device The present invention provides a sensor signal detection device which allows the improvement of reliability. This sensor signal detection device comprises an internal power supply voltage generation circuit, a buffer amplifier for receiving signals from a sensor, a ... | 03/27/2007 |
| 7183811 | Comparing circuit, comparator, level determining circuit and threshold voltage setting method In a comparing circuit, an input signal switching circuit has a first input terminal, a second input terminal, a first output terminal and a second output terminal. The input signal switching circuit is configured to receive a first input signal inputted to the firs... | 02/27/2007 |
| 7180345 | Apparatus and a method to provide time-based edge-rate compensation A method and an apparatus to provide time-based edge-rate compensation have been disclosed. In one embodiment, the apparatus includes a reference pad, a reference circuit coupled to the reference pad, the reference circuit being operable to charge and to discharge a... | 02/20/2007 |
| 7170329 | Current comparator with hysteresis A hysteresis current comparator includes a first current comparison unit, a second current comparison unit, and a control circuit connected to the two current comparison units. The first current comparison unit compares a first reference current with an input curren... | 01/30/2007 |
