Patent ID: 8023020
Filing Date: 2011-09-20
Classification: H04N

Abstract:
1. A photodetecting circuit comprising: a photodetector; a storage node having first and second node terminals; a transfer transistor, disposed intermediate the first node terminal of the storage node and the photodetector, for electrically connecting the first node terminal and the photodetector upon receiving a transfer signal to a gate of the transfer transistor; a reset transistor, disposed intermediate a reset voltage node and the first node terminal of the storage node, for electrically connecting the first node terminal to the reset voltage node upon receiving a reset signal to a gate of the reset transistor; and an output circuit for generating an output signal based on a voltage at the first terminal; the photodetecting circuit being configured to: receive the reset signal; receive the transfer signal; and receive a compensation signal at the second terminal of the storage node, the compensation signal increasing the voltage at the first terminal whilst the output circuit generates the output signal, the compensation signal being a logically negated version of the transfer signal.