Load connection state detector circuit

Details Load connection state detector circuit Load connection state detector circuit

1991-04-18

1992-09-15

Mullins, James B.

Amplifiers

With amplifier condition indicating or testing means

330 9, 330295, H03F 102, H03F 368

Patent

active

051481154

ABSTRACT:
A load connection state detector circuit for use in a stereophonic system comprises: a check mode setting circuit for generating a check mode signal to perform checking; an offset generator circuit for generating an offset voltage from an input-stage amplification section according to the check mode signal; a first current detector circuit for detecting a current flowing to a first load according to the offset voltage; a second current detector circuit for detecting a current to a second load according to the offset voltage; and a difference-current detector circuit for detecting whether or not a difference current between output currents of the first and second current detector circuits falls within a predetermined range.

REFERENCES:
patent: 3067297 (1962-12-01), Fink
patent: 4908868 (1990-03-01), McTaggart

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