Repeater level control circuit

Details Repeater level control circuit Repeater level control circuit

1978-12-29

1980-10-21

Cardillo, Jr., Raymond F.

Multiplex communications

Wide area network

Packet switching

179170C, 370 71, H04B 338

Patent

active

042296250

ABSTRACT:
A bilateral transmission line repeater is disclosed in which opposite directions of transmission are separated into different frequency bands. The amplifiers for each direction of transmission include an automatic gain control circuit for controlling the gain of the amplifier. Gain control for the inward bound amplifier (toward a central location such as a telephone central office) is under the control of an automatic gain control signal derived from the outward bound signal as well as from the inward bound signal. Feedback around the gain control amplifier is accomplished using a current mirror circuit to avoid loading the amplifier output.

REFERENCES:
patent: 2964598 (1960-12-01), Parker
patent: 3603744 (1971-09-01), Krasin et al.
patent: 3689711 (1972-09-01), Earle et al.
patent: 3823273 (1974-07-01), Beeman et al.
patent: 3893038 (1975-07-01), Omata et al.

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