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| Number | Title | Issue Date |
| 8188773 | Voltage-controlled dual-slope square and triangular waveform generator The voltage-controlled dual-slope square and triangular waveform generator is an electronic circuit that includes a plus-type second-generation current conveyor operably connected to a single operational amplifier. At the input stage to the operational amplifier, tw... | 05/29/2012 |
| 7639051 | Circuit arrangement for rectifying the output voltage of a sensor that is fed by an oscillator In the case of a measuring device having a sensor supplied from an oscillator for a non-electrical variable and having a circuit arrangement downstream of the sensor for rectifying the output voltage of the sensor, interference pulses, which are superimposed on the ... | 12/29/2009 |
| 7471125 | Sawtooth wave generating apparatus, a method of generating sawtooth wave, a constant current circuit, and a method of adjusting amount of current from the same A sawtooth wave generating apparatus includes a base frequency generating section and a frequency generating section for generating the frequency of a reference signal, a sawtooth wave forming section which forms a sawtooth wave based on the reference signal, a volt... | 12/30/2008 |
| 7372388 | A/D converter, A/D converter control method, and A/D converter connection method The present invention is intended to provide an A/D converter making it possible to reduce the power consumption of an output interface. The A/D converter includes an output current value designation register that holds a value sent from an upper-level unit, and an ... | 05/13/2008 |
| 7362149 | Zero crossing detection and correction upon a distorted primary AC power line voltage Zero crossings for a non-symmetrical VIN may be determined by first amplifying and clipping VIN to create a non-symmetrical square wave whose zero crossings are those of VIN. A selected polarity edge of the non-symmetrical square wav... | 04/22/2008 |
| 7355461 | Waveform generating circuit and spread spectrum clock generator A waveform generating circuit is provided which generates a modified triangular wave signal suitable for being input to a frequency modulation circuit such as a voltage-controlled oscillator (VCO). The waveform generating circuit includes a triangular generator, an ... | 04/08/2008 |
| 7339406 | Sawtooth wave generating apparatus, a method of generating sawtooth wave, a constant current circuit, and a method of adjusting amount of current from the same A sawtooth wave generating apparatus includes a base frequency generating section and a frequency generating section for generating the frequency of a reference signal, a sawtooth wave forming section which forms a sawtooth wave based on the reference signal, a volt... | 03/04/2008 |
| 7330373 | Program time adjustment as function of program voltage for improved programming speed in memory system In a non-volatile memory system, the programming time period allocated for the program pulse is adjusted as a function of the voltage level of the pump pulse required so that the total number of pump pulses required to program the charge storage element to the requi... | 02/12/2008 |
| 7327608 | Program time adjustment as function of program voltage for improved programming speed in programming method In a non-volatile memory system, the programming time period allocated for the program pulse is adjusted as a function of the voltage level of the pump pulse required so that the total number of pump pulses required to program the charge storage element to the requi... | 02/05/2008 |
| 7315190 | PWM circuit and PWM integrated circuit for use in PWM circuit The present invention discloses a PWM integrated circuit which may receive a programming signal without any extra pin. The PWM integrated circuit comprises: a comparator having two outputs; two pins respectively electrically connected with the two outputs; and a pro... | 01/01/2008 |
| 7259619 | Amplifier circuit with reduced power-on transients and method thereof In an amplifier circuit with reduced power-on transients, an amplifier has a gain to generate an output signal from an input signal and a reference signal when it is enabled, and a control circuit generates a control signal, based on the output signal and the refere... | 08/21/2007 |
| 7250795 | High-speed, low-power input buffer for integrated circuit devices A high-speed, low-power input buffer for an integrated circuit device in which the input voltage (VIN) is coupled to both a pull-up and a pull-down transistor. In accordance with a specific embodiment, the input buffer utilizes a reference voltage input (VREF) durin... | 07/31/2007 |
| 7212045 | Double frequency signal generator A double frequency signal generator to which a synchronization signal having a duty cycle of 1% to 999% is inputted. The synchronization signal is used for triggering of a switching component at positive and negative edges to generate a triangular-wave signal. An av... | 05/01/2007 |
| 7164310 | Systems and apparatus for digital control of bias for transistors The present invention is directed toward a system and apparatus for digitally controlling a bias control signal for at least one transistor. The present invention provides for software writable registers that control the bias control signal. The present invention fu... | 01/16/2007 |
| 7161431 | Class B amplifier with process variation independent deadband A class B amplifier circuit produces a deadband that is independent of semiconductor process variations and creates a positive voltage when a differential input voltage is non-zero. A differential input amplifier couples differential currents representing the differ... | 01/09/2007 |
| 7126394 | History-based slew rate control to reduce intersymbol interference In one aspect of the invention, a method of reducing intersymbol interference on a signal line is disclosed. A state machine records previous bits that were transmitted over the line. If the bit on the line has been static for several clock cycles, the slew rate wil... | 10/24/2006 |
| 7078942 | Driving apparatus for generating a driving current using PWM A current driving apparatus includes a first square wave generator (100), a second square wave generator (200), an FET (Field Effect Transistor) (3), and a power supply (9). The first square wave generator has an output connected to the s... | 07/18/2006 |
| 7053676 | Circuit arrangement for generating a signal having a specific waveform with an adjustable voltage level A circuit arrangement for generating specific waveforms includes a controllable voltage transformer circuit for generating an output signal (VOUT) with a specific waveform, which increases the voltage of its output signal depending on a first control sign... | 05/30/2006 |
| 7054171 | Limiting the continuous mode of a power converter The invention concerns a control circuit (20) of a switch (6) chopping a voltage supply of a primary winding of a power converter transformer, comprising means (45) for detecting the current in the switch in closed state after a predetermined ti... | 05/30/2006 |
| 7046062 | Method and device for symmetrical slew rate calibration A device and method for calibrating a slew rate is disclosed. The slew rate may be for a driver of a bi-directional buffer. A driver outputs a signal having a frequency. A receiver is coupled to the driver. A frequency counter measures the frequency of the signal. A... | 05/16/2006 |
| 7002381 | Switched-capacitor controller to control the rise times of on-chip generated high voltages A switched capacitor controller accurately controls the rise time of an on-chip generated high voltage. An on-chip charge pump is used to generate a high voltage (VPP) from an external power supply voltage (VCC). This high voltage signal (VPP) can be used to program... | 02/21/2006 |
| 6980047 | Low power high voltage ramp-up control circuit A circuit, and a method, provide low power high voltage ramp-up control for on-chip semiconductor power supplies, efficiently generating on-chip high voltage to support programming of electrically erasable programmable read only memories, EEPROMs or flash memory. Th... | 12/27/2005 |
| 6906563 | Generating a waveform having one signal level periodically and different signal levels in other durations Generating a waveform having one signal level periodically and different signal levels in other durations. Two input signals are received, one having a desired constant level and another having desired signal levels. The desired output waveform is generated by selec... | 06/14/2005 |
| 6864731 | Method and device for symmetrical slew rate calibration A device and method for calibrating a slew rate is disclosed. The slew rate may be for a driver of a bi-directional buffer. A driver outputs a signal having a frequency. A receiver is coupled to the driver. A frequency counter measures the frequency of the signal. A... | 03/08/2005 |
| 6838916 | Method of generating a voltage ramp at the terminals of a capacitor, and corresponding device A ramp capacitor CAP1 has a first terminal connected to a power supply voltage VBAT. A generator circuit is connected to a second terminal of the ramp capacitor and adapted to generate a voltage ramp at the terminals of the ramp capacitor. The generator circu... | 01/04/2005 |
| 6809563 | Fast sweep voltage ramp generator and streak camera using same A fast scanning voltage ramp generator including at least one chain of N two-pole avalanche transistors in series and a set of N+1 zener diodes in series between a high voltage power supply and ground, where N is an integer number≧2. A streak camera can utilize th... | 10/26/2004 |
| 6777974 | Arrangement and method for adjustment of the slope times for one or more drivers and a driver circuit The invention relates to an arrangement (10) and a method for adjusting the slope times of one or more drivers (90) in such a way that the adjustment is essentially independent of external conditions. The invention also relates to a driver circuit. The... | 08/17/2004 |
| 6774684 | Circuits and methods for controlling transients during audio device power-up and power-down, and systems using the same Circuitry for ramping a voltage across a load 506 includes a charging circuit 500 for charging a capacitor 501 to generate a ramp-up wave form. Circuitry 511 selectively decouples a first driver 510 from load 506 during a ra... | 08/10/2004 |
| 6753723 | Synchronous buck converter with improved transient performance A synchronous buck converter having an improved transient response during output current stepdown. The device includes series and shunt MOSFETS, a first driver circuit to turn the series MOSFET on and off according to a variable duty cycle determined by an error sig... | 06/22/2004 |
| 6696871 | Circuit for controlling a power MOS transistor and detecting a load in series with the transistor The detection of the presence of a load associated with a power MOS transistor integrated with its control circuit using a filtering time delay in generating a detection signal with respect to the occurrence of a turn-off control order of the power transi... | 02/24/2004 |
| 6661263 | Voltage sequencing arrangements providing first and second voltages sequenced to each other in time A voltage sequencer includes an input terminal and an output terminal and a control element connected between the input an output terminals. A capacitive element is connected between the output terminal and a first voltage and a resistive element is conne... | 12/09/2003 |
| 6650153 | Generator circuit for voltage ramps and corresponding voltage generation method A generator circuit for voltage ramps is provided that includes a differential stage with positive feedback coupled between a first and a second voltage reference and having a first output connected to a control terminal of a first output transistor. The ... | 11/18/2003 |
| 6628151 | Self-regulating high voltage ramp up circuit A self-regulating ramp up circuit generates a high voltage signal having a slow, smooth ramp up and reduced process and temperature variation. The circuit uses a resistor and a capacitor to control the rate at which the output signal changes state. In one... | 09/30/2003 |
| 6617895 | Method and device for symmetrical slew rate calibration A device and method for calibrating a slew rate is disclosed. The slew rate may be for a driver of a bi-directional buffer. A driver outputs a signal having a frequency. A receiver is coupled to the driver. A frequency counter measures the frequency of th... | 09/09/2003 |
| 6591149 | Method for prescribing a ramp by a clock-pulse-controlled quantity In a method for prescribing an essentially linear ramp with a prescribable slope by a quantity, and which is clock-pulse-controlled and which describes the ramp by an increment per clock interval, the ramp is described by a number of regular increments an... | 07/08/2003 |
| 6586980 | Driver circuit having a slew rate control system with improved linear ramp generator including ground Methods and structures for ensuring the highly linear discharge of a capacitor used for slew rate control of a power driving stage from a maximum voltage to a minimum supply voltage, such as ground. A voltage ramp generator uses a single cascoded current ... | 07/01/2003 |
| 6476654 | Slew rate adjusting circuit An interface circuit includes a slew rate control unit 110, a pre buffer unit 120, and a main buffer unit 130. The slew rate control unit 110 is configured as a current source circuit of the pre buffer unit 120. The slew rate control unit 110 provides a c... | 11/05/2002 |
| 6445233 | Multiple time constant rectifier apparatus and method A rectifier circuit produces an output which is a function of the magnitude of an input signal and has a controllable transient response. The circuit requires no rectification diodes. The voltage on a capacitor is sensed and compared with that of an input... | 09/03/2002 |
| 6384653 | Linearly controlled CMOS phase interpolator Method and system for providing a signal with a controllable zero crossing time value. The system provides first and second two-sided triangular wave signals, identical but shifted by a selected fraction f.multidot.T of a period T of either triangular sig... | 05/07/2002 |
| 6307414 | Slew rate/propagation delay selection circuit An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate a first output signal having a predetermined slew rate and propagation delay in response to a first input signal and a control signal. The second... | 10/23/2001 |
