Photo-feedback preamplifier circuit

Details Photo-feedback preamplifier circuit Photo-feedback preamplifier circuit

H - Electricity

04

N

330/36, 350/48

H04N 5/14 (2006.01) H03F 3/08 (2006.01)

Patent

CA 1145033

ABSTRACT OF THE DISCLOSURE A light emitting diode is modulated by the output signal of a F.E.T. amplifier, and the resulting light signal is fed back to the amplifier input via an optical fiber and a light detecting photo diode. Thus, current feedback is achieved with very flat frequency response over a full frequency band by modulating a light emitting diode with the preamplifier output signal, reconverting the resultant radiation to an electrical signal, which is then fed back to the preamplifier input.

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