Simple CMOS light-to-current sensor

Details Simple CMOS light-to-current sensor Simple CMOS light-to-current sensor

2006-01-03

2006-01-03

Porta, David (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140RC, C250S208100, C327S514000, C257S292000

Reexamination Certificate

active

06982406

ABSTRACT:
A CMOS light-to-current sensor built on silicon substrate is disclosed in this invention. This light-to-current sensor includes a photo-diode and two MOS transistors. The first MOS transistor is connected as the load transistor for the photo-generated current from the photo-diode, and the second MOS transistor is connected as the current-mirror transistor for the first transistor to output a current linearly proportional to the photo-generated current to the external resistor connected to the sensor.

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