Charge pump and devices including same
AssigneeSamsung Electronics Co., Ltd.
InventorsYONG SUK CHOI, HYUK BIN KWON, SEOK YONG PARK, DONG JAE HAN, DONG HUN HEO
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Abstract
A charge pump provides an output voltage with reduced voltage ripple. The charge pump includes a first capacitor, a second capacitor, and a control circuit. The control circuit charges the first capacitor to one of a first voltage and a second voltage and the second capacitor to the other one of the first and second voltages using differential clock signals and an input voltage during each clock phase and outputs the higher one of the first and second voltages as an output voltage.
Claims20
A charge pump receiving a regulated voltage and generating an output voltage, the charge pump comprising:
- a first capacitor, a second capacitor, and a control circuit,
- wherein the control circuit is configured to charge the first capacitor to one of a first voltage and a second voltage and to charge the second capacitor to the other one of the first voltage and second voltage in response to differential clock signals and the regulated voltage during each of a first clock phase and a second clock phase, and
- the control circuit is further configured to output a higher one of the first voltage and second voltage as the output voltage.
An image sensor comprising:
- a pixel;
- a row driver that generates control signals controlling operation of the pixel in response to an operating voltage;
- and
- a voltage generator that generates the operating voltage, wherein the voltage generator comprises:
- a regulator that generates a regulated voltage in response to a reference voltage and the operating voltage;
- a first capacitor, a second capacitor, and a control circuit,
- wherein the control circuit charges the first capacitor to one of a first voltage and a second voltage and charges the second capacitor to the other one of the first voltage and second voltage in response to differential clock signals and the regulated voltage during each of a first clock phase and a second clock phase, and
- the control circuit outputs a higher one of the first voltage and second voltage as the output voltage.
A method of operating a charge pump receiving a regulated voltage and generating an output voltage, the charge pump comprising a first capacitor, a second capacitor, and a control circuit, and the method comprising:
- charging the first capacitor to one of a first voltage and a second voltage, and charging the second capacitor to the other one of the first voltage and second voltage in response to differential clock signals and the regulated voltage during each of a first clock phase and a second clock phase;
- and
- outputting a higher one of the first voltage and second voltage as the output voltage.
Dependencies are inferred from the claim text.