Current subtractor

Details Current subtractor Current subtractor

1976-08-13

1977-10-25

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, H03F 345

Patent

active

040558126

ABSTRACT:
A current subtractor circuit utilizing a current mirror amplifier (CMA) as the subtracting element. An operational amplifier converts the difference current to an output voltage proportional to this difference. The operational amplifier additionally may be utilized to equalize the voltage drop across the conduction paths of the transistors comprising the CMA and to maintain the CMA output transistor in its constant current region of operation.

REFERENCES:
patent: 3546564 (1970-12-01), Denny
patent: 3588530 (1971-06-01), Langan

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