Transistor push-pull output stage

Details Transistor push-pull output stage Transistor push-pull output stage

1980-11-06

1982-05-11

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

330207P, 330298, 361101, H02H 320

Patent

active

043297285

ABSTRACT:
A transistor push-pull output stage, particularly for pulse shapers having inverse feedback from the output to the input, as well as a high-resistance input and a low-resistance output is disclosed. In testing components of data technology, short circuits in the component should not lead to the destruction of the output stage of the testing apparatus. To this end, the invention provides that a field effect transistor is employed in each push-pull stage as the input transistor, the field effect transistor respectively driving the parallel connection of a plurality of output transistors by way of an emitter follower stage. The bases of the output transistors are driven by way of a constant current source which is switched off given overvoltage of the output. The transistors and the push-pull stages are complementary to one another. In addition, a structure is provided for the power supply which is driven as a function of the voltage shift and of the pulse basic voltage of the signal. The transistor push-pull output stage is particularly suited as the output stage for a pulse shaper in an automatic testing unit for data processing devices.

REFERENCES:
patent: 3967207 (1976-06-01), Wheatley, Jr.
patent: 3968382 (1976-07-01), Tsurushima
patent: 4216437 (1980-08-01), Sakaida
patent: 4227227 (1980-10-01), Yamaguchi
IBM Technical Disclosure Bulletin, vol. 14, No. 3, Aug. 1971 "Power Amplifier with output Stage Protect Circuit," Lamoreaux.

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