Operational amplifier with passive current limiting

Details Operational amplifier with passive current limiting Operational amplifier with passive current limiting

1986-06-30

1987-11-24

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330253, 330261, H03F 345

Patent

active

047092165

ABSTRACT:
An improved operational amplifier circuit having an all NPN output stage includes a sense resistor in the output stage for developing a voltage thereacross proportional to any short circuit current flowing in the output stage. A diode clamp is coupled to the base of the emitter follower transistor which is in turn coupled between the input stage and the output stage for diverting base current from the base of the follower transistor when a sufficient voltage drop appears across the sense resistor.

REFERENCES:
patent: 4063185 (1977-12-01), Kojima et al.
patent: 4308504 (1981-12-01), Ida

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