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| Number | Title | Issue Date |
| 8410832 | Method and apparatus for producing triangular waveform with low audio band content A triangular waveform generator includes a square waveform clock circuit and an integrating circuit. The integration circuit receives input from the square waveform clock circuit and generates a triangular waveform output. A feedback circuit is operatively connected... | 04/02/2013 |
| 8395425 | High-precision oscillator systems with feed forward compensation for CCFL driver systems and methods thereof System and method for generating one or more ramp signals. The method includes an oscillator configured to generate at least a clock signal, and a ramp signal generator configured to receive at least the clock signal and generate a first ramp signal. Additionally, t... | 03/12/2013 |
| 8294496 | Sawtooth oscillator A sawtooth generator circuit comprises a first triangular waveform generator with equal ramp up and ramp down rates and a second triangular waveform generator with equal ramp up and ramp down rates and which are equal to the ramp up and ramp down rates of the first ... | 10/23/2012 |
| 8294494 | Triangular-wave generating circuit synchronized with an external circuit A charge-discharge circuit charges or discharges a capacitor having a fixed electric potential at one end. A first comparator compares an output voltage of the capacitor with a first threshold voltage and outputs a first comparison signal in accordance with a compar... | 10/23/2012 |
| 8294495 | Constant slope ramp circuits for sampled-data circuits A circuit includes a level-crossing detector to generate a level-crossing detection signal when an input signal crosses a predetermined voltage level. A first stage set of capacitors is operatively coupled to the level-crossing detector. A ramp circuit is operativel... | 10/23/2012 |
| 8198924 | Method and apparatus for producing triangular waveform with low audio band content A triangular waveform generator includes a square waveform clock circuit and an active integrator. The active integrator receives input from the square waveform clock circuit and generates a triangular waveform output. An active feedback network is operatively added... | 06/12/2012 |
| 8188772 | Waveform generation circuit A waveform generation circuit includes: a waveform generation block configured to generate a waveform signal corresponding to a driving control signal; and a control signal generation block configured to generate a driving control signal for compensating the wavefor... | 05/29/2012 |
| 8115523 | Circuit to spread the spectrum of a PWM signal An apparatus is provided. The apparatus comprises a first current source and a second current source that charge and discharge a capacitor. Coupled between the capacitor and the second current source is a switch that can be actuated and deactuated by a controller. P... | 02/14/2012 |
| 8106687 | Spread spectrum clock system and spread spectrum clock generator A spread spectrum clock generator includes a triangular wave generator, a digital wave modulator, a sigma delta modulator, and a selector. The triangular wave generator transforms one of the input clock signals into an original triangular wave signal, in which the i... | 01/31/2012 |
| 8044690 | System and method for clock-synchronized triangular waveform generation A triangular waveform generator is converted to a free running oscillator controlled by a calibration code. The free running oscillator can be synchronized to an external clock signal by comparing the external clock frequency to the frequency of the triangular wavef... | 10/25/2011 |
| 8030976 | Triangle wave generating circuit A triangle wave generating circuit comprising: a pulse generating circuit configured to generate a plurality of pulse signals with the same period and with phases different from one another; and a plurality of charge/discharge circuits configured to be supplied with... | 10/04/2011 |
| 7948280 | Controller including a sawtooth generator and method of operating the same A sawtooth generator adapted to produce a sawtooth voltage, a method of operating the same, and a power converter employing the sawtooth generator and method. In one embodiment, the sawtooth generator includes a current source, coupled to a clock with a clock freque... | 05/24/2011 |
| 7948282 | Triangular-wave generating circuit, and inverter, light emitting device and liquid crystal television using the circuit A first comparator compares an output voltage Vout appearing at a capacitor with a maximum threshold voltage Vmax. A second comparator compares the output voltage Vout with a minimum threshold voltage Vmin. An edge detection circuit detects an edge of a synchronizat... | 05/24/2011 |
| 7948281 | Method and apparatus for producing triangular waveform with low audio band noise content A triangular waveform generator includes a square waveform clock circuit and an active integrator. The active integrator receives input from the square waveform clock circuit and generates a triangular waveform output. An active feedback network is operatively added... | 05/24/2011 |
| 7919998 | Precision triangle waveform generator A triangle waveform generator is set forth that comprises a capacitive element, a regulator, and a control circuit. The regulator is configured to charge the capacitive element in responsive to a first control signal and to discharge the capacitive element in respon... | 04/05/2011 |
| 7816955 | Ramp generator and circuit pattern inspection apparatus using the same ramp generator The present invention provides a ramp generator capable of appropriately setting a rise starting point of an output voltage of a ramp waveform and an output voltage at the time of stable output. A current adjustment unit including a differential pair of transistors ... | 10/19/2010 |
| 7786768 | Waveform generating circuit and spread spectrum clock generator A spread spectrum clock generator is provided which improves the spread spectrum effect with little increasing the circuit cost by modifying the shape of a triangular wave used for frequency modulation by a simple method. The output signal of the modulation waveform... | 08/31/2010 |
| 7746130 | Triangular wave generating circuit having synchronization with external clock A triangular wave generating circuit includes: an integrating unit including a capacitor, the integrating unit having an output for providing a triangular wave signal; first and second constant current sources for charging and discharging the capacitor; a switch uni... | 06/29/2010 |
| 7746129 | Ultra low power servo-controlled single clock ramp generator with amplitude independent to clock frequency A low power servo-controlled single clock ramp generator (100) includes a fast switched comparator (102), charge pump (110) and voltage-to-current converter (120) connected to provide a feedback control mechanism under control of a pulse ... | 06/29/2010 |
| 7741887 | Triangular wave generator Triangular wave oscillation circuits generate A-wave and B-wave with phases opposite to each other, and are capable of independently controlling oscillation levels of the A-wave and the B-wave. A slope switching circuit including an output voltage monitoring circuit... | 06/22/2010 |
| 7642820 | Triangle wave generator and spread spectrum control circuit thereof A triangle wave generator with function of spreading frequency spectrum is provided. The triangle wave generator includes a switch control circuit, a current generator, an integrator, and a spread spectrum control circuit. The switch control circuit provides an inte... | 01/05/2010 |
| 7626430 | Triangular-wave generating apparatus incorporating capacitor In a triangular-wave generating apparatus including an output terminal adapted to output an output voltage, an incorporated capacitor connected to the output terminal, a first variable current source adapted to charge the incorporated capacitor and a second variable... | 12/01/2009 |
| 7557622 | Precision triangle waveform generator A triangle waveform generator is set forth that comprises a capacitive element, a regulator, and a control circuit. The regulator is configured to charge the capacitive element in responsive to a first control signal and to discharge the capacitive element in respon... | 07/07/2009 |
| 7554370 | Method and system for synchronizing phase of triangular signal A multiplicity of electronic devices is provided to generate triangular wave signals variable between an upper and lower limit voltages by charging or discharging capacitors. One of the triangular wave signals serves as a master triangular wave signal for controllin... | 06/30/2009 |
| 7514971 | Pulse width modulation current adjustment apparatus The present invention provides a PWM current adjustment apparatus including a triangle wave generator (8) for generating a triangle wave voltage signal, a comparator (9), an FET (10), a power supply (14), a first resistor (11) and ... | 04/07/2009 |
| 7508243 | Triangular wave generation circuit An accurate intermittent triangular wave signal without waveform distortion is generated by a triangular wave generation circuit 1 including a rectangular wave generation circuit 111 for generating an intermittent rectangular wave signal in which a rec... | 03/24/2009 |
| 7403049 | Triangular wave generation circuit A first constant-current source supplies a charging current to a second terminal of a first capacitor in which a first terminal is grounded. A first terminal of a second capacitor is grounded, and a first switch is provided between the second terminal of the first c... | 07/22/2008 |
| 7391242 | Sawtooth waveform generator A sawtooth waveform generator includes an operational amplifier that generates a ramp signal. The ramp signal charges a capacitor connected between the output of the operational amplifier and the inverting input of the operational amplifier. The inverting input is m... | 06/24/2008 |
| 7388413 | Ramp generator with fast reset An efficient ramp generator uses a reversing switch array to couple a timing capacitor in alternating polarities between an input terminal and an output terminal of an operational amplifier to generate a periodic ramp signal without discharging the timing capacitor ... | 06/17/2008 |
| 7362150 | Method and system for synchronizing phase of triangular signal A multiplicity of electronic devices is provided to generate triangular wave signals variable between an upper and lower limit voltages by charging or discharging capacitors. One of the triangular wave signals serves as a master triangular wave signal for controllin... | 04/22/2008 |
| 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 |
| 7352216 | High speed ramp generator A high speed ramp generator is presented. The high speed ramp generator is advantageous over the prior art because it provides a ramp response without the delay incident with a simple integrator approach. A closed loop system generates a continuous ramp and, in an o... | 04/01/2008 |
| 7348812 | Multiphased triangular wave oscillating circuit and switching regulator using it To oscillate and output multiphased triangular waves with a designed waveform shape, wave crest value, and phase relationship. This multiphased triangular wave oscillating circuit has two triangular wave generating circuits 10A and 10B for generating t... | 03/25/2008 |
| 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 |
| 7336110 | Differential amplitude controlled sawtooth generator A dual differential sawtooth signal generator includes a first sawtooth voltage generator that has a first capacitor and a second capacitor that are alternately charged with a feedback control source current from a low voltage reference voltage level. A second sawto... | 02/26/2008 |
| 7322743 | Temperature measurement system and method A temperature measurement system is provided to measure temperatures using temperature sensors. The temperature measurement system may include a controller having a plurality of address lines, a sensor configured to provide a plurality of inputs, and a connector con... | 01/29/2008 |
| 7317362 | Oscillator circuit and oscillation control method An oscillator circuit is disclosed that includes a first oscillation part configured to output a first oscillation output by charging and discharging a first capacitor, and a second oscillation part configured to output a second oscillation output by charging and di... | 01/08/2008 |
| 7312648 | Temperature sensor A temperature sensor, which comprises a temperature-dependent element, a comparator unit, first/second capacitors and first/second switching capacitors, is provided. The temperature-dependent element has an input terminal selectively coupled to one of a first curren... | 12/25/2007 |
| 7295935 | Analyzing and/or displaying power consumption in redundant servers A method of analyzing power consumption in an information handling system is provided. A voltage associated with a current share signal may be determined. A power load associated with the information handling system may be determined based at least on the determined... | 11/13/2007 |
