Bias circuit for photodiode having level shift circuitry

Details Bias circuit for photodiode having level shift circuitry Bias circuit for photodiode having level shift circuitry

1993-04-08

1994-08-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

307311, 307491, G05F 500

Patent

active

053430344

ABSTRACT:
In order to reduce a change in reverse bias to a photodiode due to drift of a power supply caused by, e.g., noise, and to suppress generation of a wrong photoelectric current detection signal, a bias circuit includes a load element (4), a transistor (Q1) for receiving a current from the load element (4) at its collector, a transistor (Q2) constituting a current mirror circuit together with the transistor (Q1), a level shift circuit connected between the base of an output transistor (Q3) of the current mirror circuit and the collector of the transistor (Q1), and constituted by transistors (Q4-Q7) and load elements (R1-R4), and a photodiode (1) connected to a desired potential node of the level shift circuit.

REFERENCES:
patent: 3828241 (1974-08-01), Horichi
patent: 3911268 (1975-10-01), Mori et al.
patent: 4467192 (1984-08-01), Velo
patent: 4730128 (1988-03-01), Seki
patent: 4759081 (1988-07-01), Witters
patent: 4797546 (1989-01-01), Berger et al.
patent: 4945227 (1990-07-01), Jones et al.
patent: 5270533 (1993-12-01), Pulice
"High Frequency Gallium Arsenide Current Mirror" by Stevenage, Electronics Letter; vol. 26, No. 21, Oct. 11, 1990 p. 1802.
"Integrated Current Source With High Power Supply Noise Rejection"; by Y. Bonnet and M. Verhaeghe; IBM Technical Disclosure Bulletin; vol. 23, No. 2, Jul. 1980, New York, US; pp. 639-640.

Affiliated with

Also associated with

Rating

Bias circuit for photodiode having level shift circuitry does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bias circuit for photodiode having level shift circuitry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bias circuit for photodiode having level shift circuitry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-31149