Patent ID: 8009212
Filing Date: 2011-08-30
Classification: H04N

Abstract:
1. An image processing system comprising: a photodiode (for generating data according to received light); a 4-T (4-transistor) pixel coupled to the photodiode for transferring the data received from the photodiode, the 4-T transistor including a first portion of a linearized source follower; a second portion of the linearized source follower coupled to the first portion of the linearized source follower; a ping pong memory coupled to an output terminal of the second portion of the linearized source follower for transferring the data received from the photodiode through the 4-T pixel; a PGA (programmable gain amplifier) coupled to an output terminal of the ping pong memory for amplifying the data transferred from the output terminal of the ping pong memory; and auto-zero circuitry coupled to the PGA for eliminating a dc offset and noise of the PGA.