Patent ID: 7365792
Filing Date: 2008-04-29
Classification: G03B

Abstract:
1. An image signal processor for performing a predetermined signal process on an analog image signal that is generated by a solid-state imaging device, and for generating a digital image signal that is provided to an external device and that has a predetermined format, the image signal processor comprising: a first regulator supplied with a power supply voltage to generate a first regulated voltage that is in accordance with an output level of the solid-state imaging device; a second regulator supplied with the power supply voltage to generate a second regulated voltage that is in accordance with an input level of a bus and that is higher than the first regulated voltage; a signal processing circuit configured to operate with the first regulated voltage, wherein the signal processing circuit is configured to perform predetermined signal processing on the analog image signal and to generate the digital image signal; and an output circuit configured to operate with the second regulated voltage, wherein the output circuit is configured to receive the digital image signal from the signal processing circuit and to provide the digital image signal to the external device through the bus; wherein the image signal processor is on a single chip semiconductor substrate; wherein the output circuit is connected to the external device via the bus; and wherein the first and second regulators, while being supplied with a power supply voltage, are configured to stop generating the first and second regulated voltages during at least part of a time when the bus is not in use.