EMP Resistant oscillator with fiber optic frequency determining means
AssigneeInternational Telephone and Telegraph Corporation
InventorArnold M. Levine
Life of this patent
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Abstract
A fiber optic delay line-controlled oscillator or tuned amplifier. Two embodiments are shown and described, one employing a single solid state active element and the other employing two such elements. The fiber optic delay line or lines employed are combined electronic-to-light transducer(s) supplying the delay line or lines and optical-to-electronic transducer(s) responsive to the optical delay line or lines output(s). That combination provides the tuned or oscillatory feedback path. In one embodiment, a plurality of delay lines are effectively switched into the circuit discretely and selectively in response to a staircase control function.
Claims8
An oscillatory circuit comprising:
- at least one gain producing element having an input and an output;
- at least one feedback path connected between said input and said output of said gain producing element;
- and frequency determining means within said feedback path comprising, at least one electric-to-optical transducer responsive to said output of said gain producing element, at least one fiber optic filter responsive to light signals from said transducer, and an optical-to-electric transducer responsive to said fiber optic filter, said fiber optic filter providing a phase shift within said feedback such as to produce positive feedback.
Dependencies are inferred from the claim text.