Electronic overload protection circuit
First Claim
1. An electronic overload protection arrangement for a multiple-stage amplifying circuit comprising, a current-limiting circuit interconnected to the multiple-stage amplifying circuit for limiting the current during an overload condition, and a monitoring circuit connected with said current-limiting circuit and the multiple-stage amplifying circuit for monitoring the current-limiting action and for disabling the multiple-stage amplifying circuit when the duration of the current-limiting action exceeds a predetermined period of time.
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Accused Products
Abstract
A solid-state overload protection circuit for protecting a multiple-stage compound transistor power amplifier. The overload protection circuit includes a current-limiting circuit for sensing or limiting the current during an overload condition. The current-limiting circuit includes a transistor which conducts to limit the current in the output stages of the multiple-stage power amplifier. A monitoring circuit including a timing circuit, a comparator, and a switching transistor monitors the duration of the overload condition and disables the input stages of the multiple-stage power amplifier when a prolonged overload condition persists.
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Citations
12 Claims
- 1. An electronic overload protection arrangement for a multiple-stage amplifying circuit comprising, a current-limiting circuit interconnected to the multiple-stage amplifying circuit for limiting the current during an overload condition, and a monitoring circuit connected with said current-limiting circuit and the multiple-stage amplifying circuit for monitoring the current-limiting action and for disabling the multiple-stage amplifying circuit when the duration of the current-limiting action exceeds a predetermined period of time.
Specification