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| Number | Title | Issue Date |
| 7741901 | Circuit for charging a bootstrap capacitor in a voltage converter For charging a bootstrap capacitor in a voltage converter, a circuit is provided for wider bandwidth to eliminate the feedback stability issue and pin out for compensation circuit. A pair of transistors are connected in series between a power input and the bootstrap... | 06/22/2010 |
| 7737773 | Semiconductor device, step-down chopper regulator, and electronic equipment A bootstrap circuit for a step-down chopper regulator IC includes an LDMOS transistor having a gate and a source connected to output terminals of a constant voltage circuit and a drain connected to a leader terminal of a boot voltage, and a bootstrap control circuit... | 06/15/2010 |
| 7449944 | Internal voltage generator An internal voltage generator includes a high efficient charge pump. The internal voltage generator includes an oscillation signal generator for receiving a reference voltage and a pumping voltage to thereby output an oscillation signal, a pump control logic for out... | 11/11/2008 |
| 7432757 | Booster circuit, semiconductor device, and electronic apparatus A conventional circuit requires a booster circuit for generating a voltage higher than an external power supply voltage, thus low power consumption is difficult to be achieved. In addition, a display device incorporating the aforementioned conventional switching ele... | 10/07/2008 |
| 7385441 | Level shifter with reduced power consumption A buffer circuit has a first transistor and a second transistor in a cascode, and a buffer switch coupled from an output of the buffer to a gate of the second transistor. The buffer circuit is bootstrapped by a bootstrap capacitor, a diode circuit, and a bootstrap s... | 06/10/2008 |
| 7385440 | Bootstrapped switch for sampling inputs with a signal range greater than supply voltage A bootstrapped circuit for sampling inputs with a signal range greater than supply voltage includes: a bootstrapped switch coupled between an input node and an output node; a first transistor coupled to a control node of the bootstrapped switch; a first capacitor ha... | 06/10/2008 |
| 7365582 | Bootstrapped charge pump driver in a phase-lock loop A charge pump includes first and second pairs of differential transistors. Each transistor includes control, first, and second terminals. First and second charge pump drivers communicate with the control terminal of one of the first pair of differential transistors ... | 04/29/2008 |
| 7365592 | Power supply circuit A power supply circuit includes at least one capacitor, a plurality of switching members, a power supply which outputs a plurality of voltages and a selecting section for controlling said plurality of switching sections to periodically select one of said plurality o... | 04/29/2008 |
| 7362139 | Semiconductor device A circuit with a large load driving capability, which is structured by single polarity TFTs, is provided. With a capacitor (154) formed between a gate electrode and an output electrode of a TFT (152), the electric potential of the gate electrode of the... | 04/22/2008 |
| 7348828 | Voltage supplier of semiconductor memory device The present invention provides voltage supplier for supplying an internal voltage with optimized drivability required for internal operation. The voltage supplier of a semiconductor memory device includes: an internal voltage detection means for detecting a voltage ... | 03/25/2008 |
| 7342437 | Charge pump circuit A size of a charge pump circuit is reduced as well as its cost. In a positive booster charge pump circuit in an embodiment of this invention, a positive boosted voltage 2VDD generated at its first stage node is used as a gate voltage to turn on a MOS transistor that... | 03/11/2008 |
| 7328690 | Apparatus and method for accurate detection of locomotive fuel injection pump solenoid closure The invention relates to a system and method for detecting a closing of a solenoid. The system includes a capacitive charge circuit electrically coupled to the solenoid. The capacitive charge circuit conditions the current flow through the solenoid to increase the c... | 02/12/2008 |
| 7321258 | Method and apparatus for controlling the charge of a bootstrap capacitor for non-synchronous type DC-DC converter A method of controlling the charge of the bootstrap capacitor during light load or no load conditions for a non-synchronous type of DC-DC converter consists of bootstrap capacitor voltage detector, light load detector and secondary switch controller. By turning on t... | 01/22/2008 |
| 7319626 | High voltage generating circuit and method and semiconductor memory device including the circuit A first pump circuit is coupled to a first pump signal line and is configured to generate a first voltage greater than a power supply voltage at an output thereof responsive to transition of the first pump signal line from a ground voltage to the power supply voltag... | 01/15/2008 |
| 7317640 | Nonvolatile memory with erasable parts In a nonvolatile memory in which a load on a boosting circuit changes according to the number of rewrite bytes, the boosting circuit is configured so as to perform voltage boosting at a relatively slow predetermined speed regardless of the number of rewrite bytes, w... | 01/08/2008 |
| 7304531 | Internal voltage generator Provided is an internal voltage generator for preventing an occurrence of leakage current while a charge pumping is not performed. The internal voltage generator includes: a charge pumping unit for pumping an external voltage to generate a high voltage higher than t... | 12/04/2007 |
| 7304463 | DC-DC converter A DC-DC converter includes an Nch FET1 which is series connected between an input terminal and an output terminal, and an Nch FET2 which is connected between the output terminal side of the Nch FET1 and a ground terminal. On the outp... | 12/04/2007 |
| 7282986 | Negative voltage generator circuit The present invention is related to a negative voltage generating circuit for reliably providing the semiconductor integrated circuit (IC) with a negative voltage. An electric charge pumping device generates a negative voltage by pumping an electric charge to a pred... | 10/16/2007 |
| 7274222 | Control method for an analogue switch Method for controlling an analogue switch including a transistor to which a variable analogue input voltage Vin is applied on a first terminal between a source terminal and a drain terminal of the transistor while a second terminal between the drain and the source t... | 09/25/2007 |
| 7268623 | Low voltage differential signal driver circuit and method for controlling the same Provided are a low voltage differential signal driver circuit and a method for controlling the same. The differential signal driver circuit includes: a differential amplification signal generator disposed between a power supply voltage terminal and a ground terminal... | 09/11/2007 |
| 7268610 | Low-voltage CMOS switch with novel clock boosting scheme A method and apparatus for boosting the gate voltages of a CMOS switch used in an integrated circuit designed in a sub-micron CMOS process is disclosed. The CMOS switch is coupled to Vin and Vout nodes, and contains PMOS and NMOS gates. Two boosting circuits are use... | 09/11/2007 |
| 7265606 | Apparatus and method for a boot strap circuit for a boost voltage converter A boost converter with a flying capacitor topology is provided. The flying capacitor is charged during a first half of a cycle. During a second half of the cycle, the output voltage of the boost converter is supplied from Vdd until the output voltage approximately r... | 09/04/2007 |
| 7260014 | Voltage supply circuit for memory array programming According to one exemplary embodiment, a memory array includes a number of bitlines. The memory array further includes a voltage supply circuit, where the voltage supply circuit is configured to receive an operating voltage and a control signal and to output a low o... | 08/21/2007 |
| 7253675 | Bootstrapping circuit capable of sampling inputs beyond supply voltage The bootstrapping circuit capable of sampling inputs beyond supply voltage includes: a bootstrapped switch MN20 coupled between an input node and an output node; a first transistor MP13 having a first end coupled to a control node of the bootstrapped s... | 08/07/2007 |
| 7245176 | Apparatus for generating internal voltage in test mode and its method An apparatus for receiving a first supply voltage in order to generate an internal voltage includes a control signal generating block for receiving a control enable signal and a clock signal and generating a pumping control signal having a period determined by one o... | 07/17/2007 |
| 7242226 | Method and apparatus for avoiding false switching in an electronic device A system and method for reducing forward inadvertent biasing of a switch having a transistor. The gate of the transistor is connected to ground and a voltage source less than ground. A control signal of the gate is then applied to a level translator to compensate fo... | 07/10/2007 |
| 7230469 | Multi-level/single ended input level shifter circuit Methods are disclosed for translating or shifting a voltage level of a single ended input. More specifically, the present invention provides a method of translating or shifting a voltage level that doesn't require a complementary input or an additional power supply ... | 06/12/2007 |
| 7230471 | Charge pump circuit of LCD driver including driver having variable current driving capability A charge pump circuit of a liquid crystal display driver integrated circuit (LDI) is provided, which can reduce unnecessary current consumption when a load of an output node varies is provided, where, in a gradient mode of a display-on mode, in which an output node ... | 06/12/2007 |
| 7224203 | Analog voltage distribution on a die using switched capacitors In an embodiment, a switched capacitor transformer transfers a differential reference voltage at its input ports to its output ports, where a capacitor is switched so that the capacitor is coupled to the input ports during a first portion of a cycle of operation and... | 05/29/2007 |
| 7224206 | Charge-pump with improved biasing of the body regions of the pass-transistors A charge pump is proposed. The charge pump is integrated in a chip of semiconductor material and includes a plurality of capacitive elements each one connected to a corresponding circuit node of the charge pump, the circuit nodes being arranged in a sequence from an... | 05/29/2007 |
| 7215189 | Bootstrap diode emulator with dynamic back-gate biasing A bootstrap diode emulator circuit for use in a half-bridge switching circuit employing transistors connected to one another in a totem pole configuration, a driver circuit for driving the transistors, and a bootstrap capacitor for providing power to the high-side d... | 05/08/2007 |
| 7203124 | System and method for negative word line driver circuit A negative word line driver employs devices to maintain the potential difference between the active word line signal and the inactive word line signal while reducing the need for a significant negative voltage supply. One form of the negative word line driver employ... | 04/10/2007 |
| 7190215 | Method and apparatus for sensing current and voltage in circuits with voltage across an LED Methods and apparatuses to sense current and voltage in circuits with voltage drop. In one aspect of the invention, a sense circuit includes a first diode, a first resistor and a light emitting diode (LED). The first resistor is coupled to the first diode. The first... | 03/13/2007 |
| 7180136 | Biased, triple-well fully depleted SOI structure In one illustrative embodiment, the device comprises a transistor formed above a silicon-on-insulator substrate comprised of a bulk substrate, a buried insulation layer and an active layer, the bulk substrate being doped with a first type of dopant material and a fi... | 02/20/2007 |
| 7176728 | High voltage low power driver A power driver circuit is provided including a low voltage source, a high voltage source, at least one input signal line, an output node, and circuitry adapted to connect the output node to the low voltage source when the input signal line is in a first state and to... | 02/13/2007 |
| 7154801 | Protection circuit of a memory module and the method thereof A protection circuit of the memory module and method thereof are provided. The protection circuit includes: a first voltage comparing unit, which compares a reference voltage signal with a voltage level signal to output a first driving signal; a transistor switch, w... | 12/26/2006 |
| 7151393 | High-speed write driver A write driver includes two field-effect/bipolar transistors with feedbacks between the drains/collectors and gates/bases, a write/read switch connected between the drains/collectors and a positive power supply, an impedance matching circuit connected to the drains/... | 12/19/2006 |
| 7148739 | Charge pump element with body effect cancellation for early charge pump stages A charge pump stage comprising a pulse train which injects energy into a gate of a charge transfer transistor of the charge pump stage, wherein a modified output of the pulse train is input to a bulk of the charge transfer transistor such that a bulk voltage of the ... | 12/12/2006 |
| 7145391 | Bias current cancellation for differential amplifiers Differential amplifiers are provided that substantially cancel the input bias currents at the inputs to the differential amplifiers. A circuit produces a compensation current that is substantially equal in magnitude but opposite in polarity to input bias currents as... | 12/05/2006 |
| 7132878 | Charge pump current source This invention provides a circuit and a method for generating a low-level current using semiconductor charge pumping. The invention provides a means of generating a range of current sources by varying the frequency of a repetitive voltage pulse input signal. Also, t... | 11/07/2006 |
