Image sensor pixel and method

摘要

In accordance with an embodiment, a 4T pixel includes a first switch having a control terminal and first and second current carrying terminals and an amplifier having an input terminal and an output terminal. A second switch is coupled between the first switch and the amplifier.

主权项

1. A pixel comprising:
a photodiode having an anode and a cathode; a first switch having a control terminal and first and second current carrying terminals, the first current carrying terminal coupled to the cathode of the photodiode; a second switch having a control terminal and first and second current carrying terminals, the first current carrying terminal of the second switch coupled for receiving a first source of operating potential and the second current carrying terminal of the second switch coupled to the second current carrying terminal of the first switch; a third switch having a control terminal and first and second current carrying terminals, the first current carrying terminal of the third switch coupled to the second current carrying terminals of the first and second switches; an amplifier having an input coupled to the second current carrying terminal of the third switch; a first memory element coupled to the second current carrying terminal of the third switch; and a second memory element coupled to the first terminal of the third switch.