Dual output switching circuit

Details Dual output switching circuit Dual output switching circuit

1980-07-24

1982-06-29

Weldon, Ulysses

Electricity: motive power systems

Motor-reversing

318293, H02P 122

Patent

active

043374239

ABSTRACT:
A switching circuit provides first and second output signals to respective first and second output load devices that are switched responsive to an input signal. The switching point of the first output signal is set relative to the switching point of the second output signal to achieve "make before break" or "break before make" switching of the first and second output load devices. In particular, the switching circuit uses an emitter coupled differential amplifier having first and second differential output signals. Each of the first and second differential output signals is received by a respective first and second current mirror amplifier for converting each differential output signal to the respective first and second output signal. The switching point of the first output signal is determined by the ratio of the output current to input current of the first current mirror amplifier, while the switching point of the second output signal is determined by the ratio of output current to input current of the second current mirror amplifier.

REFERENCES:
patent: 2264993 (1941-12-01), McShane
patent: 3110851 (1963-11-01), Plogstedt et al.
patent: 3144598 (1964-08-01), Merritt
patent: 3525883 (1970-08-01), Iordanidis
patent: 3568024 (1971-03-01), Robbins
patent: 3825852 (1974-07-01), Pinckaers
patent: 3978384 (1976-08-01), Gucker
patent: 4124811 (1978-11-01), Anderson

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