Output stage current limit circuit

Details Output stage current limit circuit Output stage current limit circuit

1987-06-05

1988-09-13

Salce, Patrick R.

Electricity: power supply or regulation systems

Self-regulating

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

323314, 307297, G05F 326

Patent

active

047712287

ABSTRACT:
An amplifier output stage includes current limiting circuitry for limiting the current in the output stage if the output terminal is shorted to ground. The current sinking and the current sourcing output transistors each have a current limiting circuit which mirrors the collector current of the output transistor, produces a voltage which is a function of the mirrored collector current, and controls base current to the output transistor as a function of the voltage. The output current limiting function, therefore, is provided without sacrificing output voltage swing of the output stage.

REFERENCES:
patent: 3996498 (1976-12-01), Schade, Jr.
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patent: 4352056 (1982-09-01), Cave et al.
patent: 4399375 (1983-08-01), Sempel
patent: 4442411 (1984-04-01), Gehring
patent: 4553084 (1985-11-01), Wrathall
patent: 4591780 (1986-05-01), Yamada et al.
patent: 4612497 (1986-09-01), Ulmer

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