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| Number | Title | Issue Date |
| 8115517 | Circuit arrangement for identifying network zero crossings A circuit arrangement for identifying network zero crossings of a network voltage of an alternating current network is provided. A measurement current generated by the network voltage is supplied to a zero crossing detector in order to produce a network zero crossin... | 02/14/2012 |
| 7940090 | Zero-crossing detecting device and image forming device A zero-crossing detecting device that detects a zero-crossing point of AC voltage, the device has a full-wave rectifier that rectifies the AC voltage and outputs a full-wave rectified voltage, a charger that is charged at a predetermined charging voltage by applicat... | 05/10/2011 |
| 7786766 | Appliance control system with a zero crossing detecting circuit A control system includes a zero crossing detecting circuit for detecting a zero crossing of an AC signal. The circuit includes a transformer having a primary portion and a secondary portion. The primary portion receives the AC signal. The secondary portion comprise... | 08/31/2010 |
| 7535265 | High accuracy zero crossing detector and method therefor In one embodiment, a zero crossing detector couples a plurality of comparators in parallel and operates at least a portion of the comparators at different time periods. ... | 05/19/2009 |
| 7508240 | Power mains zero-crossing detector A zero-crossing detector includes a pair of input terminals, the terminals being adapted to receive an AC input signal; a rectifier, the rectifier rectifying the AC input signal; a current source, the current source being powered by the rectified AC input signal; an... | 03/24/2009 |
| 7394295 | Sense amplifier The invention relates to a sense amplifier comprising the following element: a first current mirror unit coupled to a high voltage source, outputting a first current and a second current according to a first reference current, wherein the second current is twice the... | 07/01/2008 |
| 7352134 | Lamp containing fixed reverse phase switching power supply with time-based phase pulse triggering control A lamp contains a lamp voltage conversion circuit within the lamp and connected to a lamp terminal. The voltage conversion circuit includes a phase-control clipping circuit that clips a load voltage and provides an RMS load voltage to the lamp. The phase-control cli... | 04/01/2008 |
| 7336085 | Current sensing circuit A circuit arrangement for detecting a load current through a load includes a main transistor, a sensing transistor through which a load current flows that is a measure of the load current flowing through the main transistor. In addition, a resistance is connected in... | 02/26/2008 |
| 7298182 | Comparator using differential amplifier with reduced current consumption A comparator circuit with reduced current consumption, and other circuits utilizing the same, are provided. The comparator circuit may achieve reduced current consumption by preventing current flow via a switching transistors responsive to the voltage level of the i... | 11/20/2007 |
| 7271624 | Low-power supply voltage level detection circuit and method An input power supply voltage level detection circuit and method are presented. The circuit includes a main detector core and a two-inverter buffer block that can include a first inverter and a second inverter. The circuit receives a voltage input signal and outputs... | 09/18/2007 |
| 7259597 | Low-voltage detection circuit A low-voltage detection circuit detects a terminal voltage of a power supply terminal. The low-voltage detection circuit includes a first voltage-dividing circuit, a second voltage-dividing circuit, and a comparator. The second voltage-dividing circuit includes a bi... | 08/21/2007 |
| 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 |
| 7158407 | Triple pulse method for MRAM toggle bit characterization A method is provided for testing magnetic bits (3, 104, 514) of an array. A train of first (702), second (704), and third (706) pulses is provided to a desired bit, the first and second pulses beginning at a substantially similar low fiel... | 01/02/2007 |
| 7130340 | Noise margin self-diagnostic receiver logic A noise margin self-diagnostic receiver circuit has been developed. The self-diagnostic circuit includes one comparator for comparing the signal voltage to a high reference voltage, a second comparator for comparing the signal voltage to a low reference voltage, and... | 10/31/2006 |
| 7065334 | Variable gain amplifier device A variable gain amplifier device controlled by a first gain control signal comprises a gain controlled amplifier having a gain and including a differential pair of first and second MOS type transistors configured to operate in a weak inversion region; and a control ... | 06/20/2006 |
| 7062244 | Speed-up mode implementation for direct conversion receiver A speed-up mode control system is operative to generate a speed-up mode signal based on a gain control signal from associated digital circuitry. The speed-up mode signal controls electronics associated with one or more amplifiers to facilitate settling time of an ou... | 06/13/2006 |
| 7049859 | Variable threshold comparator interface circuit A signal processing circuit includes a comparator having a fixed and a variable reference input for detection of a positive quasi-sinusoidal waveform pulse. A signal detection circuit includes a low pass input filter, a voltage input clamp, a variable detection thre... | 05/23/2006 |
| 7030682 | Voltage detection circuit and internal voltage generating circuit comprising it An internal voltage generation circuit and a voltage detection circuit for stably generating an internal voltage at a desired voltage level are provided. The voltage detection circuit includes an insulated gate field effect transistor receiving a reference voltage a... | 04/18/2006 |
| 6998891 | Apparatus for calibrating a charge pump and method therefor A signal calibration apparatus of a charge pump minimizes a current from the charge pump. The signal calibration apparatus includes a detecting circuit, a current adjusting circuit, and a calibrating circuit, wherein the detecting circuit is coupled to the charge pu... | 02/14/2006 |
| 6937089 | Offset, delay and parasitically immune resister-capacitor (RC) tracking loop and method of using same A resistor capacitor (RC) tracking loop includes a parasitic insensitive integrator (211) charged by a buffer (207) with offset compensation. The integrator (211) operates to provide an accurate ramped voltage proportional to a measured RC time ... | 08/30/2005 |
| 6864755 | Switched reactance modulated E-class oscillator design A modulated Class E transmitter is disclosed. In one embodiment of the invention, the modulated Class E oscillator achieves high coil currents (˜1A) and voltages (˜500V) with low power components by precisely timed injection of current when the oscillating current... | 03/08/2005 |
| 6819145 | High speed differential pre-driver using common mode pre-charge In general, the embodiments introduce a pre-charge state between an idle state (when no data in being transmitted) and an active state (when data is being transmitted). In the pre-charge state, both differential signals are pre-charged to the common mode voltage, wh... | 11/16/2004 |
| 6664817 | Zero-cross detection circuit In a power supply device including a full-wave rectifying and smoothing circuit powered from a commercial AC power supply via two power supply lines, a switching regulator for separating and stepping down the output from the full-wave rectifying and smoot... | 12/16/2003 |
| 6605965 | Differential window comparator A window comparator is disclosed having a 1st and a 2nd voltage input wherein the window comparator is fully differential with respect to the 1st and 2nd voltage inputs. Two differential pairs control the state ... | 08/12/2003 |
| 6417701 | Method and apparatus for identifying a waveform period A technique is provided for identifying waveform period or specific events during a waveform period. A periodic waveform is an input signal for a comparator, voltage divider and a balanced load. The circuitry produces a square waveform that has the same p... | 07/09/2002 |
| 6389548 | Pulse run-length measurement for HF data signal by dividing accumulated phase difference between first and second zero-crossings by single-cycle range using multiple cycle range sawtooth waveform A system and method for accurately measuring a pulse run length in a high frequency (HF) data signal while utilizing a low analog-to-digital conversion (ADC) sampling rate. Four bits are added to the most significant end of an oscillator's accumulator reg... | 05/14/2002 |
| 6326816 | Method and apparatus for minimal phase delay and zero-crossing filtering An apparatus for minimal phase delay and zero crossing filtering, obtaining a filtered signal without phase delay and glitch by combining a zero crossing filter and a hysteresis zero crossing filter. The zero crossing filter and the hysteresis zero crossi... | 12/04/2001 |
| 6275394 | Input circuit There is provided an input circuit with reduced electrical power consumption, which processes an input signal given thereto for removing the noise components contained therein and regulating the voltage level thereof as well, and then supplies an output s... | 08/14/2001 |
| 6084364 | Using different frequency clocks to clock counters of a driver circuit at spin-up and at regulation A circuit and method for clocking counters in a polyphase dc motor is provided in which the motor is capable of operating at two or more operating states, spin-up and regulation. The system clock is connected to the clocking circuit through dividers to pr... | 07/04/2000 |
| 6052005 | Low current drain switch interface circuit A low current drain switch interface circuit includes an input terminal (105), coupled to a first terminal (201) of a diode (115). A voltage follower circuit (211) is coupled to a second terminal (203) of the diode (115). A current source (215) is coupled... | 04/18/2000 |
| 5973515 | Differential input stage for wideband reception with high rejection of common mode An integrated circuit comprises at least one differential input stage. The differential input stage includes an input circuit and a shaping circuit. The input circuit comprises a first portion and a second portion for providing two pairs of differential s... | 10/26/1999 |
| 5903172 | Output voltage detection circuit for traffic signal controller An improved output voltage detection circuit for a traffic signal controller which is capable of minimizing an operational characteristic variation with respect to the operational temperature variation and enabling a compact product. The circuit includes ... | 05/11/1999 |
| 5892375 | Comparator with small signal suppression circuitry A comparator circuit has first and second inputs and an output and includes means for operating the comparator in alternate autozero and comparator phases. During an autozero phase, the inputs of the comparator are clamped to a reference potential and dur... | 04/06/1999 |
| 5862185 | Data signal zero crossing detection process The invention concerns a process for detecting the zero crossings of a data signal by employing of a comparator. To be able to accurately detect zero crossings even when the data signal is distorted due to transmission over a system with filtering charact... | 01/19/1999 |
| 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 |
| 5805001 | Zero phase circuit for sampled data phase locked loop A circuit provides a restart signal to indicate a zero crossing of a continuous varying signal. A zero phase signal is generalized based on a zero crossing of the continuous varying signal. The continuous varying signal is sampled and held in accordance w... | 09/08/1998 |
| 5717348 | Self adjusting edge detector circuit A edge detector for the production of output signal in a manner dependent on positive and negative edges of a square wave signal comprises a differential amplifier with two base-coupled transistors (Q1, Q2). Each emitter of such transistors is connected v... | 02/10/1998 |
| 5670858 | Single-phase induction motor safety controller An electronic control apparatus to operate an alternating current induction motor protecting same from power line blackouts, brownouts and providing self-adjusting, linearized, non-stepped reduced voltage output coinciding to work load to enhance efficien... | 09/23/1997 |
| 5623220 | Offset reduction in a zero-detect circuit A zero-crossing circuit and method, in which the sign of inputs to a comparator is reversed after each zero crossing of the input signal. This means that delay introduced by the comparator does not affect the duty cycle of the output signal, so precision ... | 04/22/1997 |
| 5619165 | Voltage threshold detection circuit with very low consumption A supply-voltage-monitoring circuit, for low-power integrated circuits, in which charge-sharing through a switched-capacitor chain is used to couple the supply voltage to a dynamic sensing node. The dynamic sensing node drives a half-latch, which is stabl... | 04/08/1997 |
