Patent ID: 7215370
Filing Date: 2007-05-08
Classification: H04N

Abstract:
1. A Pseudo-BJT based retinal focal-plane sensing system, which mimics the three cell functions of P cell, H cell and B cell in a single pixel, and performs image sensing effect, comprising: a row decoder, used for detecting external images, randomly selecting desired pixel and generating a row address; a column decoder, used for detecting external images, randomly selecting desired pixel and generating a column address; a pixel array module, used for reading pixels and detecting external images; in addition, outputting pixel voltages appointed by the row decoder and the column decoder one by one; wherein a voltage is generated when an image signal is received by the row address and the column address; a data buffer, used for converting parallel data to serial data in order to reduce output pins of the chip; a circuit for current hysteresis, used for eliminating noise disturbance and adjusted adaptively according to a value of induced photocurrent, which enhances noise immunity and eliminates noise disturbance; and a resistance circuit, having the function of Low-Pass Filter enabling high frequency noise to be eliminated with high tunable capability.