Amplifier with short-circuit protection

Details Amplifier with short-circuit protection Amplifier with short-circuit protection

1990-07-03

1992-03-17

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including protection means

330207P, H02H 720

Patent

active

050972251

ABSTRACT:
An amplifier circuit in which a first amplifier (A1) and a second amplifier (A2) are protected against short-circuits by a protection apparatus which includes a first device (M1), a second device (M2), a third device (M3) and a protection device (B). For this purpose the first device and the second device generate four signals (s1, s2, s3, s4) related to an equal number of currents (i1, i2, i3, i4), which currents are related to a first or a second load current in the first amplifier or in the second amplifier. In order to control the protection device (B), the third device generates at least two control signals (r1, r2) related to the signal currents (s1, s2, s3, s4), use being made of the equality of the load currents in the absence of short-circuits.

REFERENCES:
patent: 4414514 (1983-11-01), Seki et al.
patent: 4607235 (1986-08-01), Seevinck

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