IMAGE SENSOR AND AN IMAGE PROCESSING SYSTEM HAVING THE SAME, CAPABLE OF UNIFORMLY REGULATING AN ELECTRIC CURRENT FLOWING IN AN INVERTER USING A VOLTAGE REGULATING CIRCUIT WITHOUT PROCESS, VOLTAGE, AND TEMPERATURE

摘要

PURPOSE: An image sensor and an image processing system having the same are provided to regulate a supplied power and an input voltage with a voltage regulating circuit having a replica inverter of which the structure is identical to the structures of inverters in the delta-sigma modulator of a delta-sigma analog-digital converter.;CONSTITUTION: An image sensor includes delta-sigma analog-digital converters (510-5n0) and a voltage regulating circuit (100). The delta-sigma analog-digital converter has a delta-sigma modulator implementing a delta-sigma modulation on an analog signal from a unit pixel, and converts the analog signal into a digital signal. The voltage regulating circuit has a replica inverter of which the structure is identical to the structure of at least one inverter in the delta-sigma modulator, and regulates a power and an input voltage supplied to the at least one inverter based on an electric current flowing in the replica inverter.;COPYRIGHT KIPO 2013