Circuit and method for compensating for offset voltage
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsJung Gong, Kyoung Kwon, Hyeon Hwang, Sang Kim
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Abstract
A circuit for compensating for an offset voltage in a PhotoDetector Integrated Circuit (PDIC). The circuit includes a temperature detection unit, a current transfer unit and a current adjustment unit. The temperature detection unit generates a current that varies with variation in surrounding temperature. The current transfer unit transfers the generated current. The current adjustment unit adjusts the current transferred from the current transfer unit at a predetermined ratio and outputs the adjusted current.
Claims15
A circuit for compensating for an offset voltage, comprising:
- a temperature detection unit generating a current varying with a variation in surrounding temperature;
- a current transfer unit transferring the generated current;
- and
- a current adjustment unit adjusting the current transferred from the current transfer unit at a predetermined ratio and outputting the adjusted current.
A circuit for compensating for an offset voltage, comprising:
- a temperature detection unit generating a current varying with a variation in surrounding temperature;
- a current transfer unit transferring the generated current;
- a current adjustment unit amplifying and transferring the current transferred by the current transfer unit;
- and
- an output unit generating a constant current regardless of the variation in surrounding temperature, and outputting a compensated offset voltage by adding the current received from the current adjustment unit to the current generated by the device.
A method for compensating for an offset voltage, comprising the steps of:
- generating a current varying with variation in surrounding temperature;
- mirroring and transferring the generated current;
- and
- generating a compensation current comprising the steps of:
- amplifying the transferred current at a predetermined ratio;
- and
- transferring the compensation current.
Dependencies are inferred from the claim text.