Circuit arrangement comprising an amplifier connected to an opto

Details Circuit arrangement comprising an amplifier connected to an opto Circuit arrangement comprising an amplifier connected to an opto

1989-09-15

1990-07-03

Mullins, James B.

Amplifiers

Having light-controlled or activated device

250214A, 330308, H03G 330

Patent

active

049394754

ABSTRACT:
A circuit arrangement comprises an amplifier that has an input connected to an opto-electrical transducer and a gain which is controllable with the assistance of a control voltage. In order to achieve a great dynamic range given a constant operating point of the amplifier, the drain-source path of a field effect transistor, a feedback path includes a capacitor, and the input of the amplifier is connected to the output of a comparator that compares the output voltage of the amplifier to a reference voltage. The circuit arrangement can be advantageously employed in optical transmission equipment of PCM technology.

REFERENCES:
patent: 3631262 (1971-12-01), Jarrett
patent: 4124825 (1978-11-01), Webb et al.
Williams, G. F. et al., "Active Feedback Lightwave Receivers," Journal of Lightwave Technology, vol. LT-4, No. 10, Oct. 1986, pp. 1502-1508.

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