Polarity guard circuit

Details Polarity guard circuit Polarity guard circuit

1981-11-16

1983-12-13

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Reverse phase responsive

361246, 307127, 307200A, 320 25, H02H 720

Patent

active

044207867

ABSTRACT:
Four bipolar transistors are arranged in a bridge configuration and are interconnected with two additional bipolar transistors to provide an efficient polarity guard circuit. The circuit has two output terminals, one of which has a positive polarity regardless of the polarity across two input terminals. The two additional transistors prevent collector to base current from flowing through any of the bridge transistors which may be biased off.

REFERENCES:
patent: 3593101 (1971-07-01), Emmasingel
patent: 3819951 (1974-06-01), Moore
patent: 4034168 (1977-07-01), Brown
patent: 4139880 (1979-02-01), Ulmer et al.
Wireless World, vol. 84, p. 1507, (Mar. 1978), "Cross Coupled Transistor Bridge".
Measurement Techniques, vol. 18, No. 6, p. 873, (Jun. 1975), FIG. 2, "Linear Rectifier for Small Signals".

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