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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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7508252 |
Semiconductor integrated circuit device
A semiconductor integrated circuit device has a boosted-voltage power-supply circuit generating a boosted voltage, an internal circuit being driven with the boosted voltage, and a control circuit...
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7508253 |
Charge pump device and operating method thereof
A charge pump device and an operating method thereof are proposed. The charge pump device is composed of a plurality of stages of charge transfer units and an output unit that are cascaded...
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7504877 |
Charge pump and voltage regulator for body bias voltage
An integrated circuit including a voltage generator for generating a body bias voltage is described. The voltage generator includes a charge source and a voltage regulator coupled to the charge...
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7504892 |
Charge-pump for phase-locked loop
A charge-pump includes a first charge-pump sub-circuit having a control terminal that communicates with a first bias voltage line. A first charge-pump mirror sub-circuit regulates current on the...
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7504893 |
System and method for reducing transient responses in a phase lock loop with variable oscillator gain
A system and method for reducing the transient responses in a phase lock loop (PLL) ( 100 ) with variable oscillator gain is disclosed. The system includes a charge pump ( 104 ) having an adapt...
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7504876 |
Substrate bias feedback scheme to reduce chip leakage power
Disclosed is an improved substrate bias feedback circuit, and a method for operating the same.
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7502239 |
Charge pump circuit and power supply circuit
A charge pump circuit is provided for generating a voltage (1+1/n) times as high as a supply voltage. The charge pump circuit eliminates the need for diodes for preventing a current from flowing...
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7501882 |
Charge pumps
The method is for controlling a charge pump of the type where two flying capacitors charge and discharge to a reservoir capacitor in sequence. Part of the switching is carried out in parallel,...
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7501881 |
Boosting voltage generating circuit for generating a stable boosting voltage under a wider range of supply voltage and semiconductor memory device having the same
The boosting voltage generating circuit of example embodiments may include a boosting level detection unit, a first boosting pump, and a second boosting pump. The boosting level detection unit may...
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7498866 |
High voltage pumping device
A high voltage pumping device is provided which includes a first high voltage detector for detecting a level of a high voltage, and generating a first pumping enable signal which is enabled when...
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7499007 |
Maximizing efficiency of battery-powered LED drivers
An apparatus and method is provided for optimizing LED driver efficiency. The present invention offers low cost solutions for powering LEDs while minimizing overall power dissipation in devices...
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7495500 |
Method for using a multiple polarity reversible charge pump circuit
A multiple polarity reversible charge pump circuit is disclosed which, in certain embodiments, may be configured to generate a positive voltage at times and may be reversed to generate a negative...
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7495501 |
Charge pump circuit and semiconductor device having the same
A conventional charge pump circuit requires a step-up circuit or the like for turning on or off a transistor. Therefore, it has a problem of an increase in circuit scale, which leads to increases...
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7492213 |
High-voltage generating circuit including charge transfer switching circuit for selectively controlling body bias voltage of charge transfer device
Provided are a charge transfer switch circuit for selectively controlling body bias voltage of a charge transfer device, and a boosted voltage generating circuit having the same. The charge...
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7489566 |
High voltage generator and related flash memory device
A high voltage generator includes a charge pump generating a high voltage in response to a pumping clock signal, a charge/discharge circuit responsive to the pumping clock signal and charging the...
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7489182 |
Charge pump start up circuit and method thereof
The present invention discloses a charge pump start up circuit comprising: a start up transistor having one end which is electrically connected with a voltage supply source, and another end which...
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7486128 |
Charge pump control circuit and control method thereof
A charge pump control circuit and a control method for controlling charge pumps are disclosed. The output terminal of the charge pump is coupled to a load circuit. The charge pump control circuit...
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7482856 |
VPP voltage generator for generating stable VPP voltage
The present invention relates to a VPP voltage generator that generates a stable VPP voltage. The VPP voltage generator of the present invention generates a stable VPP voltage. Therefore, power...
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7479915 |
Comparator architecture
A comparator presents a linear load to input signals when providing a comparison output of two input signals. The comparator contains a transistor configured in a source/emitter follower...
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7479820 |
Semiconductor device including detector circuit capable of performing high-speed operation
A detector circuit and a negative voltage generating circuit capable of performing high-speed operation are provided. A negative voltage generating circuit includes a charge pump circuit, a first...
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7477092 |
Unified voltage generation apparatus with improved power efficiency
Unified voltage generation techniques for efficiently generating a plurality of operational voltages for use within an electronic device, such as a memory system (e.g., memory product) providing...
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7477093 |
Multiple polarity reversible charge pump circuit
A multiple polarity reversible charge pump circuit is disclosed which, in certain embodiments, may be configured to generate a positive voltage at times and may be reversed to generate a negative...
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7474141 |
Mode transition control method and circuit for a charge pump
A mode transition control method and circuit switch a charge pump to an operating mode with lower conversion ratio at a regular interval when the input voltage of the charge pump is detected close...
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7474140 |
Apparatus for generating elevated voltage
Disclosed is an apparatus for generating an elevated voltage that compares an external supply voltage with a reference voltage, and performs voltage pumping using either the reference voltage or...
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7474161 |
Charge pump circuit
While a charge pump activation/deactivation control circuit is outputting a high level signal, MOS transistors for short-circuiting a flying capacitor are off, and the charge pump circuit operates...
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7474142 |
Internal voltage generating circuit
There is an internal voltage generating circuit for providing a stable internal voltage by supplying the internal voltage before a time point when it is used. The internal voltage generating...
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7468623 |
Clamp circuit with fuse options
A voltage control circuit provides a test supply voltage during manufacturing and testing of a semiconductor device and provides an operational supply voltage after certification of the...
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7468628 |
Internal voltage generators for semiconductor memory device
An internal voltage generator capable of reducing the variation width in the level of an internal voltage VPP, by performing charge pumping only a predetermined number of times in a period where an...
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7466187 |
Booster circuit
A booster circuit for boosting and outputting a voltage between a power supply potential line and a reference potential line using a capacitor connected between a boosted voltage output node and...
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7466190 |
Charge pump with four-well transistors
In one embodiment, a (negative-voltage) charge pump with one or more stages that receives a (high) input voltage and generates a higher-magnitude (negative) output voltage. Each stage has two...
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7466188 |
Stress control mechanism for use in high-voltage applications in an integrated circuit
A voltage pump circuit that has an oxide stress control mechanism is disclosed. In particular, the oxide stress control mechanism of the voltage pump circuit ensures a safe transistor...
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7466312 |
Level shifter circuit and method for controlling voltage levels of clock signal and inverted clock signal for driving gate lines of amorphous silicon gate-thin film transistor liquid crystal display
Provided are a level shifter circuit and a corresponding method for controlling voltage levels of a clock signal and an inverted clock signal for driving gate lines of a ASG thin film transistor...
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7466189 |
Semiconductor integrated circuit
The present invention provides a charge pump circuit capable of achieving desired boosting operation even when a high-side switch for precharge or a low-side switch for driving output is...
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7459959 |
Method and apparatus for driving LED's
A plurality of LEDs is driven in parallel, in at least two modes. In a first mode, the LEDs are driven with a first voltage. In subsequent modes, the LEDs are driven with successively higher...
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7456676 |
Charge pump circuit for semiconductor memory device
A charge pump circuit may include a cross-coupled load unit and a bias determination unit. The cross-coupled load unit may receive first and second input signals applied with mutually opposite...
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7456677 |
Fractional gain circuit with switched capacitors and smoothed gain transitions for buck voltage regulation
A switch array circuit that enables voltage regulation by bucking a relatively larger input voltage as it declines over time with different fractional gains that are based on different gain phase...
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7453296 |
Delay locked loop having charge pump gain independent of operating frequency
A delay locked loop (DLL) having a charge pump gain independent of the operating frequency of the DLL. A method for providing a constant gain for a charge pump component of a delay locked loop...
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7453313 |
Charge pumping circuit
A charge pumping circuit includes a first switch for controlling one of push and pull operations in accordance with a first control signal; a current mirror circuit constructed from transistors...
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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...
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7449937 |
Power supply circuit
A power supply circuit, comprises a booster circuit that boosts the voltage supplied from a power supply to produce an output voltage; a voltage divider circuit that divides said output voltage by...
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7449938 |
Apparatus and method for generating internal voltage in semiconductor integrated circuit
An internal voltage generating apparatus includes: a voltage detector that detects the level of the internal voltage and outputs a fixed level detection signal and a variable level detection...
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7446595 |
Charge pump circuit with power management
This invention provides a charge pump circuit used in phase-locked loop (PLL) having the function of power management for portable application. According to different applications, power management...
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7446596 |
Low voltage charge pump
A single pump stage of a multi-stage charge pump couples a first low-voltage NMOS transistor in series with a first low-voltage PMOS transistor between charge transfer capacitors. A second...
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7446594 |
Booster circuit including an oscillator
Disclosed is a booster circuit comprising a voltage detection circuit for outputting a decision output signal for detecting a boosted voltage and controlling a voltage boosting operation, an...
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7439794 |
Power source circuit
A power source circuit adapted to output a first set potential which is set according to a first selection signal, or a second set potential which is set according to a second selection signal and...
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7439793 |
Charge pump circuits and methods for the same
A charge pump circuit may include a plurality of charge pump cells. Each charge pump cell may further include an output node for supplying charge, a pumping node for receiving a clock signal and a...
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