Patent ID: 7884865

Claim:
A system for detecting high-speed noise in active pixel sensors, comprising: a junction photodiode; a reset transistor having a first source terminal, a first gate terminal and a first drain terminal, wherein the first source terminal is connected to the junction photodiode, the first gate terminal receives a reset signal, and the first drain terminal receives a reset voltage; an amplifier transistor having a second source terminal, a second gate terminal and a second drain terminal, wherein the second gate terminal is connected to the junction photodiode and the reset transistor's first source terminal, and wherein the amplifier transistor's second drain terminal receives a supply voltage; a row select transistor having a third source terminal, a third gate terminal and a third drain terminal, wherein the third gate terminal receives a row select signal, and the third drain is connected to the second source terminal of the amplifier transistor; a high-speed analog-to-digital converter having a first analog input port and a first digital output port, wherein the first analog input port is connected to the third source terminal of the row select transistor; and a predictor circuit having a second digital input port, a second digital output port and a second reset signal output port, wherein the second digital input port of the predictor circuit is connected to the first digital output port of the analog-to-digital converter.