Differential current source

Details Differential current source Differential current source

1989-10-06

1991-06-04

Beha, Jr., William H.

Electricity: power supply or regulation systems

Self-regulating

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

323312, G05F 112

Patent

active

050217291

ABSTRACT:
A differential, voltage-controlled current source, employing operational amplifiers as the active elements, provides an essentially symmetrical, differential, high impedance drive to a load, the drive being isolated from any circuit common or system ground. Because of the "floating" differential drive and the identical source impedances of the two outputs, errors from common mode voltages are eliminated.

REFERENCES:
patent: 4451779 (1984-05-01), Griep
patent: 4585987 (1986-04-01), Prue et al.
patent: 4618814 (1986-10-01), Kato et al.
patent: 4812781 (1989-03-01), Regnier
Bailey, "Nanoampere Current Source is Adjustable, Stable, Inexpensive," Elect. Design, vol. 29, No. 2, pp. 134-136, Jan. 22, 1981.
"Differential Current Driver," NASA Tech Brief No. MSC-16475, Winter 1977.

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