Compensation of base-current-related error in current mirror amp

Details Compensation of base-current-related error in current mirror amp Compensation of base-current-related error in current mirror amp

1980-06-25

1982-08-17

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

330293, H03F 304

Patent

active

043452167

ABSTRACT:
A current mirror amplifier comprising a master mirroring transistor with collector-to-base connection for adjusting its emitter-to-base potential to condition it to conduct input current applied to its collector-emitter path, a plurality of slave mirroring transistors arranged to respond to an emitter-to-base potential equal to that of the master mirroring transistor for conducting an output current through its emitter-collector path proportional to the input current, a further transistor with its collector-emitter path arranged to sense the collector current of one of the slave mirroring transistors, and a component current mirror amplifier responding to the base current of the further transistor flowing through its input connection to supply a substantial share of the base current needs of said mirroring transistors at its output connection.

REFERENCES:
patent: 3668541 (1972-06-01), Pease
patent: 3714600 (1973-01-01), Kuijk et al.
patent: 3717821 (1973-02-01), Amemiya et al.
patent: 3947704 (1976-03-01), Blauschild
Limberg, "Current Amplifier Circuits", RCA Technical Notes, TN 1187, Aug. 12, 1977.
"Transistor Circuits", Abstract of United Kingdom Pat. No. 1,444,811, dated Oct. 5, 1973.

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