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7573320 |
High voltage generating circuit preserving charge pumping efficiency
A high voltage generating circuit is disclosed. In the high voltage generating circuit a boost node is precharged and boosted by a plurality of pump circuits and then discharged to an output...
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7570105 |
Variable current charge pump with modular switch circuit
A charge pump circuit includes switch circuit modules and current modules. The number of switch circuit modules that are coupled to receive current from one of the current modules is variable. The...
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7570106 |
Substrate voltage generating circuit with improved level shift circuit
A substrate voltage generating circuit including level shifting circuits, a first power supply node of a first potential level V DD a second power supply node of a second potential level V SS ...
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7570104 |
Charge pump circuit control system
The invention discloses a charge pump circuit control system comprising a level detector, a ring oscillator, and a charge pump circuit. The level detector detects the variation of the output...
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7567118 |
Booster circuit
An oscillation circuit 10 outputs oscillation clocks 100 different in phase, and a four-phase clock generation circuit 20 generates a four-phase clock 200 based on a difference in phase...
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7564297 |
Power supply circuit and electronic device equipped with same
A power supply circuit is provided which is capable of preventing a drop in an output voltage of the power supply circuit used as a DC/DC converter made up of single and conductive type (n-type or...
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7564300 |
High voltage generator
A high voltage generator includes a charge pump configured to output a pumping voltage in accordance with a first clock signal and a second clock signal having a level opposed to a level of the...
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7561130 |
Solar powered street-lamp control circuit
A control circuit for regulating current supplied from a power source to at least one load. The control circuit has a current mirror circuit electrically coupled between the power source and the at...
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7560977 |
Step-up booster circuit
In a step-up booster circuit, a number of pump circuits are connected in series. Pump control signals are outputted from a pump control circuit, and the pump circuits accordingly generate a...
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7560978 |
Internal voltage detection circuit
An internal voltage generator for use in a semiconductor memory device includes a first voltage detection unit, a second voltage detection unit, a detection signal generation unit, and an internal...
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7560974 |
Generation of back-bias voltage with high temperature sensitivity
A level detector within a back-bias voltage generator includes a toggling unit and a temperature detector. The toggling unit causes an enable signal to be activated when an absolute value of a...
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7557641 |
Fractional charge pump for step-down DC-DC converter
A charge pump provides a multiplication factor of ⅔ by using a three-phase mode of operation. In a first mode, first and second capacitors are charged from an input voltage while a third...
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7557625 |
Phase locked loop charge pump reference current bootstrapping
A phase locked loop with a charge pump circuit has increased stability and phase margin. The charge pump circuit feeds back its voltage output to generate a reference current. In one embodiment,...
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7557640 |
Regulated charge pump with digital resistance control
A charge pump includes a resistor divider connected between an output voltage node and ground and a comparator inputting a reference voltage at one input, and a divided voltage from the resistor...
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7554386 |
High voltage generation circuit and method for reducing peak current and power noise for a semiconductor memory device
A high voltage generation circuit for use with a semiconductor memory device includes a plurality of high voltage generation units and a control circuit. The high voltage generation units generate...
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7554385 |
Charge pump circuit and electric appliance therewith
In a charge pump circuit, the slew rate at which a clock signal is fed to charge transfer transistors is changed according to the output voltage. This configuration helps alleviate rush currents at...
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7551018 |
Decoupling capacitor circuit
The invention discloses a decoupling capacitor circuit, comprising a plurality of coupled deep trench capacitors connected in series and a plurality of push-pull circuits. The decoupling capacitor...
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7551153 |
Combined exponential/linear RGB LED I-sink digital-to-analog converter
Methods and systems to achieve linear and exponential control over a current to drive color LEDs have been achieved. Current digital-to-analog converters (IDAC) comprising each an exponential...
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7548109 |
Voltage converter and display device comprising a voltage converter
A booster circuit of a two-step booster structure is manufactured by NMOS single channel processes and has two basic booster circuits to raise a gate voltage of a charge transfer transistor. The...
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7545202 |
Method and system for providing a charge pump very low voltage applications
A method and system for providing an output voltage greater than a voltage provided by a voltage supply in a semiconductor device are disclosed. The method and system include providing a plurality...
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7545658 |
DC-DC boost converter with a charge pump
A DC-DC boost converter comprises a charge pump selectively operating in a voltage doubler or in a voltage tripler mode. A switching arrangement connects the charge pump to an input voltage...
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7545203 |
Internal voltage generation circuit
An inter voltage generation circuit includes a pumping voltage generator to generate a pumping voltage, a level comparator to compare the pumping voltage level with a peripheral voltage level and...
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7545685 |
High voltage switch circuit having boosting circuit and flash memory device including the same
A high-voltage switch circuit includes an enable control circuit, a feedback circuit, a boosting circuit, and a high voltage switch. The enable control circuit precharges an output node to a set...
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7541859 |
Charge pump circuit
For downsizing a charge pump circuit which selects a voltage multiple ratio, converts its input voltage and outputs the converted voltage, the number of switching devices of the charge pump circuit...
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7541860 |
Current control circuit used for voltage booster circuit
When a low level voltage is inputted to an input terminal IN, a transistor EF 1 enters a blocked state, a first switch circuit SW 1 enters a conduction state, and a second switch circuit SW 2 ...
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7538600 |
Voltage generator and semiconductor memory apparatus with the same
A voltage generator includes: a pumping voltage detecting section configured to detect a level of a pumping voltage in accordance with a reference voltage, that activates a pumping enable signal...
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7538601 |
Step-up voltage generator for semiconductor memory and method for controlling the same
A step-up voltage generator for a semiconductor memory is provided which includes a level detection unit, a bank-active command generator, and an oscillation signal generator. The level detection...
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7535281 |
Reduced time constant charge pump and method for charging a capacitive load
A charge pump and method converts an input voltage to a boosted voltage having a magnitude or polarity that is different from that of the input voltage. The input voltage is adjusted so that it has...
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7532060 |
Charge-pump device with increased current output
In a charge-pump device, a charge-pump circuit has an input, which is connected to a supply line and receives a supply voltage, and an output; in the charge-pump circuit a first elementary stage...
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7532062 |
Semiconductor charge pump using MOS (metal oxide semiconductor) transistor for current rectifier device
A semiconductor charge pump includes a plurality of P-channel MOS transistors being connected in series, a plurality of first pumping capacitors one electrode of each of which is connected to a...
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7532445 |
Transient voltage clamping circuit
A circuit for transient voltage clamping, the circuit being internal to a motor driver ASIC for a hard drive and including a power transistor for sinking a power supply voltage subjected to...
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7532033 |
Source driver and level shifting apparatus thereof
The present invention discloses a source driver and a level shifting apparatus thereof. The level shifting apparatus is used for shifting a level of a data signal. The level shifting apparatus...
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7532061 |
Charge-pump type, voltage-boosting device with reduced ripple, in particular for non-volatile flash memories
Voltage-boosting device having a supply input receiving a supply voltage, and a high-voltage output. The device is formed by a plurality of charge-pump stages series-connected between the supply...
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7528647 |
Semiconductor integrated circuit which generates different voltages based on an external power supply voltage and a generating method of the different voltages
A semiconductor integrated circuit includes a first voltage generating circuit which generates a boosted voltage based on a first external power supply voltage. The boosted voltage is greater than...
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7525369 |
Semiconductor circuit apparatus with voltage boost
A semiconductor circuit apparatus includes a booster which is connected to a single power supply and outputs a power supply voltage of the power supply or a voltage different from the power supply...
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7521988 |
Voltage booster for semiconductor device and semiconductor memory device using same
A semiconductor device has a power-saving mode and a normal mode. A voltage booster within the semiconductor device responds to the normal mode and the power-saving mode by controlling various...
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7521912 |
Power supply apparatus
In a power supply apparatus for performing constant current driving of a light emitting diode which is a load circuit, a constant current circuit is disposed on a path for driving the load circuit....
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7521983 |
High-voltage switch with low output ripple for non-volatile floating-gate memories
A high-voltage switch has a high-voltage input terminal, receiving a high voltage, and an output terminal. A pass transistor, having a control terminal, is connected between the high-voltage input...
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7518433 |
Voltage pumping device
A voltage pumping device is disclosed. The device may include a voltage level detector for detecting a level of a voltage fed back thereto and generating a voltage pumping enable signal according...
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7518432 |
Low noise multiphase charge pump and control method thereof
A low noise multiphase charge pump comprises a plurality of capacitors and a plurality of switches configured as a network, the switches are so switched that the charge pump operates in at least...
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7518421 |
System and method for providing a kick back compensated charge pump with kicker capacitor
A kick back compensated charge pump circuit with kicker capacitor is disclosed. The charge pump circuit comprises a pump up circuit that comprises a first PMOS transistor and a second PMOS...
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7518431 |
Semiconductor integrated circuit for processing audio and video signals
A semiconductor integrated circuit includes a charge pump circuit that repeats charge and discharge of a capacitor based on a clock signal when an ON/OFF control voltage is ON; a first delay...
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7514985 |
Fast turn on and off speed in PLL cascoded charge pump
A charge pump includes a first switch coupled between a first voltage source and a first node, second switch coupled between the first node and a second node, a third switch coupled between the...
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7514984 |
Charge pumping circuit and direct current converting apparatus using the same
Embodiments of a charge pumping circuit insensitive to change in the threshold voltage of a transistor and a direct current converting apparatus employing the charge pumping circuit are disclosed....
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7514986 |
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...
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7511564 |
Voltage-booster power supply circuit
A voltage-booster power supply circuit comprises a semiconductor IC and an external circuitry. The semiconductor IC has: first and second charge pump circuits each of which boosts a voltage by...
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7511561 |
Boosting circuit
The present invention provides a charge-pump boosting circuit. In a charging period of a capacitor C 1 , a PMOS transistor Q 1 and an NMOS transistor Q 2 turn on, and the capacitor C 1 is...
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7511563 |
Ripple current reduction circuit
A ripple current reduction circuit includes a supply node coupled to the output of a high ripple voltage source such as a charge pump. A first current mirror is referred to the supply node and...
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7511560 |
Charge pump circuit
A charge pump circuit including a plurality of switches and a switch control circuit is provided. The charge pump circuit is suitable for a display panel. The switches switch from “off” state...
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7511559 |
Booster circuit
A pull-out lower limit voltage for setting a voltage level when the gate voltage of the charge transfer transistor is pulled out is supplied to a reset circuit. In order to secure the breakdown...
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