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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 8154270 | Power-up control for very low-power systems An input protection circuit (IPC) may prevent an input signal from propagating into a system, such as an integrated circuit (IC), when the voltage level of the input signal exceeds a specified value. The IPC may be configured to compare the input signal voltage, whi... | 04/10/2012 |
| 8085028 | Method of driving a semiconductor device As for a transistor, overlapped are factors such as a variation of a gate insulation film which occurs due to a difference of a manufacturing process and a substrate used and a variation of a crystalline state in a channel forming region and thereby, there occurs a ... | 12/27/2011 |
| 8013587 | DC/DC power supply circuit with a bypass circuit A power supply circuit includes: an input terminal; a DC voltage converter that converts a DC input voltage supplied to the input terminal into a DC output voltage; an output terminal that outputs the DC output voltage; a bypass circuit provided to the DC voltage co... | 09/06/2011 |
| 7782041 | Linear regulator for use with electronic circuits A linear regulator is described that includes a mode selection circuit. In one implementation, the mode selection circuit is operable to receive an input voltage and to set an operation mode to one of a first mode or a second mode (e.g., based on a voltage level of ... | 08/24/2010 |
| 7764058 | Source follower circuit As for a transistor, overlapped are factors such as a variation of a gate insulation film which occurs due to a difference of a manufacturing process and a substrate used and a variation of a crystalline state in a channel forming region and thereby, there occurs a ... | 07/27/2010 |
| 7573251 | AC-to-DC voltage regulator The present invention provides a high efficiency voltage regulator. It includes an input transistor coupled to a voltage source to provide a supply voltage. A detection circuit is coupled to the voltage source and the supply voltage to generate a control signal and ... | 08/11/2009 |
| 7456625 | Electric circuit As for a transistor, overlapped are factors such as a variation of a gate insulation film which occurs due to a difference of a manufacturing process and a substrate used and a variation of a crystalline state in a channel forming region and thereby, there occurs a ... | 11/25/2008 |
| 7443149 | Regulator circuit capable of detecting variations in voltage A regulator circuit is provided which suppresses a variation in output voltage upon occurrence of a variation in input voltage or output current without any increase in steady-state power consumption. ... | 10/28/2008 |
| 7429851 | Constant voltage power supply circuit A disclosed constant voltage power supply circuit (1) has an input terminal (Vdd), an output terminal (Vout), a constant voltage power supply unit (2) that generates a constant voltage (Vo1) with a ripple voltage (Vri), and a ripple removing cir... | 09/30/2008 |
| 7414442 | Buffer circuit and integrated circuit In a two-stage inverter circuit including an inverter circuit constituted by first and second FETs and an inverter circuit constituted by two FETs, a source and a gate of a third FET are connected to a first power source and a second power source, respectively. A dr... | 08/19/2008 |
| 7411375 | Apparatus for issuing an electrical output signal An apparatus for issuance of at least one electrical output signal (Iout), wherein the desired electrical current level of the output signal (Iout) is predeterminable, including: at least one measuring resistor, at which the electrical current level of the output si... | 08/12/2008 |
| 7391201 | Regulated analog switch Circuits and methods to achieve a regulated analog switch being capable to provide an output-voltage not exceeding a defined limit are disclosed. In a preferred embodiment a car battery provides a supply voltage up to 40 Volts, wherein a load must not have an output... | 06/24/2008 |
| 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 |
| 7362083 | DC-DC converter with modulator circuit having a feed forward structure A DC-DC converter with an inductor connected in series with a power transistor between first and second terminals of a DC supply source, and with a modulator circuit that has a control output connected to a control gate of the power transistor. The modulator circuit... | 04/22/2008 |
| 7327203 | PWM signal generation circuit and PWM control circuit A PWM signal generation circuit and a PWM control circuit are provided in which the duty ratio is easily changed and which can also avoid adverse impact from ambient temperature changes and the like. At the beginning of charging a capacitor with a current flow, a vo... | 02/05/2008 |
| 7309976 | DC/DC converter having an internal power supply A DC/DC converter in which the DC output set voltage can be raised includes a switching transistor arranged to input an external power supply voltage, a smoothing circuit, a switching control circuit to which the internal power supply voltage is supplied and arrange... | 12/18/2007 |
| 7279872 | Circuit and method for processing a supply voltage with voltage peaks A circuit for processing a supply voltage with a voltage peak to obtain an output signal with reduced or eliminated voltage peak, comprises a first capacitance and a second capacitance, wherein a controllable resistor is formed between the first and second capacitan... | 10/09/2007 |
| 7279878 | Output regulating device for regulating output of electric power source depending on input therefrom If an input voltage to an output control device is above a lower limit value, the output control device operates in a constant voltage control mode for maintaining an output voltage at a substantially constant voltage. If the input voltage of the output control devi... | 10/09/2007 |
| 7274218 | Integrated circuit An integrated circuit includes a first and a second amplifier circuit (10, 20), which are in each case driven by an input signal (Vin) having a high and a low signal level and a reference signal (Vref) having a constant signal level and, on the output side (D... | 09/25/2007 |
| 7274180 | Constant voltage outputting method and apparatus capable of changing output voltage rise time A constant voltage outputting apparatus includes an input terminal, an output terminal, a control unit, a plurality of output control transistors, and a switching unit. The input terminal receives an input voltage, and the output terminal outputs an output voltage. ... | 09/25/2007 |
| 7256409 | Optical sensor circuit combining functions of open and close type optical sensor circuits An optical sensor circuit comprises an optical sensor adapted to sense a position of a component in a semiconductor manufacturing apparatus according to the presence or absence of a flag and output a signal indicative of the position. A position sensing driver recei... | 08/14/2007 |
| 7248031 | Electric circuit and semiconductor device As for a transistor, overlapped are factors such as a variation of a gate insulation film which occurs due to a difference of a manufacturing process and a substrate used and a variation of a crystalline state in a channel forming region and thereby, there occurs a ... | 07/24/2007 |
| 7230467 | Constant edge generation circuits and methods and systems using the same A circuit for generating stable signal edges includes an output driver circuit having a current path for varying a charge on a capacitor in response to an input signal and constant current generation circuitry for maintaining a constant current through the current p... | 06/12/2007 |
| 7224214 | Integrated circuit An integrated circuit includes a first and a second amplifier circuit each driven by an input signal. The first and second amplifier circuits generate a first and a second control signal on the output side. The control signals are generated independently of one anot... | 05/29/2007 |
| 7218499 | Charge control circuit A charge control circuit includes a switch circuit having an input node configured to receive a reference voltage at a selected voltage level and configured to respond to a charge signal to pre-charge the input node with a pulse charge at the selected voltage level.... | 05/15/2007 |
| 7218086 | Switching regulator with programmable output levels using a single input pin A switching regulator provides programming output current control through a single input terminal by modifying the reference voltage in the control loop of the switching regulator. The switching regulator includes a first input terminal receiving a program input vol... | 05/15/2007 |
| 7215103 | Power conservation by reducing quiescent current in low power and standby modes A method and circuit for automatically lowering a quiescent current at a predetermined threshold. A compact and low power current comparator is employed to detect the power consumption conditions, and issues a control signal to lower current consumption within a pow... | 05/08/2007 |
| 7212954 | Information processing apparatus, failure monitoring method and failure monitoring computer program An information processing apparatus including a plurality of modules that are provided for each information processing feature, a plurality of switches that are provided respectively for the modules so as to turn on and off the power supply to the respective modules... | 05/01/2007 |
| 7208918 | Vehicle rotating electric machine An inverter device is mounted on the rotating electric machine body The inverter device includes a module unit having a converter circuit and a control unit that controls the operation of the converter circuit. The converter circuit is configured by connecting a plu... | 04/24/2007 |
| 7196917 | PFC pre-regulator frequency dithering circuit A circuit and method of dithering the switching frequency of an off-line power factor corrected (PFC) pre-regulator. The circuitry used to dither the frequency is advantageously accomplished by taking advantage of the PWM's internal timing circuitry. This invention ... | 03/27/2007 |
| 7196482 | PWM controller with automatic low battery power reduction circuit and lighting device incorporating the controller A controller for controlling a voltage applied to a load from a power source includes a square wave producing circuit for connection in the circuit with the battery and the lamp. The square wave producing circuit produces a variable duty cycle square wave for contro... | 03/27/2007 |
| 7161338 | Linear voltage regulator with an adjustable shunt regulator-subcircuit A linear voltage regulator is provided for providing an output voltage to a load. In a preferred embodiment, the linear voltage regulator comprises: an operational amplifier receiving a regulated voltage, and a first voltage reference, and providing a driving voltag... | 01/09/2007 |
| 7155133 | Avalanche photodiode controller circuit for fiber optics transceiver A controller for controlling the reverse-bias voltage of an avalanche photodiode in a transceiver or receiver. The controller includes memory for storing information related to the avalanche photodiode, and analog to digital conversion circuitry for receiving an ana... | 12/26/2006 |
| 7126384 | Peak detection circuit with double peak detection stages A peak detection circuit with double peak detection stages includes an analog peak detector, an analog-to-digital converter (ADC), and a digital peak detector. The analog peak detector receives an analog input signal, detects a peak value of the analog input signal ... | 10/24/2006 |
| 7116086 | System and method for driving LEDs Embodiments of the invention provide for a system and method for driving LEDs with consistently good illumination and superior efficiency at lower cost and suitable for use with cheaper LEDs or with LEDs having wide component parameter tolerances over wide operating... | 10/03/2006 |
| 7116921 | Method and apparatus to correct power source voltage variation in an image forming system A method and apparatus to correct power source voltage variation in an image forming system. The apparatus to correct power source voltage variation includes: an image density sensing unit which senses an image density; a first variation correction unit which calcul... | 10/03/2006 |
| 7113005 | Current mirror circuit The present invention provides a current mirror circuit of which consistency (ratio) of the input current and output current is more improved. This current mirror circuit comprises input side and output side bi-polar transistors of which bases are commonly connected... | 09/26/2006 |
| 7106034 | Voltage regulator circuit with a low quiescent current A voltage regulator circuit with a low quiescent current for generating a stable output voltage includes a standby mode controller for generating an enable signal according to a standby signal, a reference voltage generator for receiving an operation voltage and gen... | 09/12/2006 |
| 7106039 | Closed loop direct current to direct current converter that does not require voltage reference A closed loop DC-to-DC converter circuit that includes an open loop DC-to-DC converter circuit configured to provide charge on its output terminal. A voltage-controlled inverse-resistance component is coupled to the output terminal of the open loop DC-to-DC converte... | 09/12/2006 |
| 7095273 | Voltage generator circuit and method for controlling thereof A voltage generator circuit which is capable of preventing the generation of a through current in a transition to a power-down mode to reduce current consumption. The voltage generator circuit includes a voltage generator activated by a reference voltage to generate... | 08/22/2006 |
