Loudspeaker protection network

Details Loudspeaker protection network Loudspeaker protection network

1975-11-21

1977-05-10

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

330207P, 361104, H02H 720

Patent

active

040230740

ABSTRACT:
A conventional complementary symmetry push-pull type of current amplifier is modified by the inclusion of a diode which permits the predriver transistor, which otherwise would be turned off, to be turned on, when one of the fuses between the power supply and the amplifier blows, thereby maintaining the D.C. input to and hence the D.C. output of the amplifier at essentially zero volts and keep D.C. off the direct coupled loudspeaker.

REFERENCES:
patent: 3376388 (1968-04-01), Reiffin
patent: 3462697 (1969-08-01), Gilbert
patent: 3522480 (1970-08-01), Routh et al.
patent: 3536958 (1970-10-01), Sondermeyer
patent: 3544720 (1970-12-01), Corderman
patent: 3659218 (1972-04-01), Haneda
patent: 3731151 (1973-05-01), Ozawa
patent: 3731153 (1973-05-01), Nishimoto
patent: 3818366 (1974-06-01), Arimura et al.

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