Load protective circuit

Details Load protective circuit Load protective circuit

1975-05-15

1977-03-01

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

330207P, 361 88, H02H 720

Patent

active

040104028

ABSTRACT:
A load protective circuit having a class B amplifying stage driven by a class A amplifier and a load DC coupled to the class B stage, in which means are provided for detecting an undesirable DC voltage at the output of the class B amplifying stage and for producing a control signal in response to the output of the detecting means. A first protective means shunts the input signal to the class B amplifier to ground in response to the control signal. A second protective means controls a switching means connected between the output point and ground so as to connect the output point of the class B amplifier to ground in response to the control signal to thereby remove any undesirable DC voltage from the output point of the amplifier and to protect the DC coupled load from being damaged.

REFERENCES:
patent: 3544720 (1970-12-01), Corderman
patent: 3555358 (1971-01-01), Gibbs
patent: 3659218 (1972-04-01), Haneda
patent: 3691427 (1972-09-01), Honda et al.
patent: 3731153 (1973-05-01), Nishimoto
patent: 3814988 (1974-06-01), Ito
patent: 3912981 (1975-10-01), Tsurushima

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