Variable current source having a programmable current-steering n

Details Variable current source having a programmable current-steering n Variable current source having a programmable current-steering n

1979-10-29

1981-07-21

Shoop, William M.

Electricity: power supply or regulation systems

Self-regulating

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

G05F 144

Patent

active

042800919

ABSTRACT:
A variable current source having a programmable current-steering network is provided in which a plurality of field-effect transistors both provide current switching and form an integral part of the current source. This is accomplished by switching the field-effect transistors into and out of the feedback loop of a voltage follower, which in turn is connected to a current-setting resistor. Reference voltage for the current-setting resistor is provided by a variable voltage generator. The field-effect transistors are switched by means of a programmable digitally-switched bias generator circuit.

REFERENCES:
patent: 3943431 (1976-03-01), Hareyama
patent: 3947704 (1976-03-01), Blauschild
patent: 3982172 (1976-09-01), Van De Plassche
patent: 3986101 (1976-10-01), Koetsch et al.
patent: 4004155 (1977-01-01), Nercessian
patent: 4163188 (1979-07-01), Culmer

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