Constant current source

Details Constant current source Constant current source

1979-06-04

1981-09-29

Shoop, William M.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

307297, 330257, G05F 320

Patent

active

042925843

ABSTRACT:
A constant current source circuit having a first diode connected transistor for providing a first potential, a second diode connected transistor and a first resistor connected in series with the second diode connected transistor for providing a second potential, a comparator compares the first potential with the second potential to provide a first current corresponding to the potential difference between the first and second potentials, third and fourth transistors which respond to the first current to bias the first and second transistors, and a constant current output circuit which responds the first current to provide a constant current output.

REFERENCES:
patent: 3629691 (1971-12-01), Wheatley, Jr.
patent: 3900790 (1975-08-01), Ohsawa
patent: 3914683 (1975-10-01), Van de Plassche
patent: 3962592 (1976-06-01), Thommen et al.
patent: 4075574 (1978-02-01), Gilbert

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