Apparatus for controlling output power of transmitter

Details Apparatus for controlling output power of transmitter Apparatus for controlling output power of transmitter

1986-03-14

1987-11-24

Ng, Jin F.

Telecommunications

Transmitter

With feedback of modulated output signal

455117, 330279, 330284, 330207P, H04B 104, H03G 300

Patent

active

047094036

ABSTRACT:
An apparatus for controlling the output power of a transmitter that is installed in a vehicle or used in a mobile radio communication equipment has a power amplifier, a coupler for delivering an output corresponding to the output power from the power amplifier, a detector disposed after the coupler, a comparator for delivering an output proportional to the difference between the output voltage from the demodulator and a reference voltage, and a voltage control circuit for controlling the output power of the power amplifier in response to the output from the comparator. An RF variable attenuator is disposed before the comparator to compress the dynamic range of the signal applied to the voltage control circuit.

REFERENCES:
patent: 3486128 (1969-12-01), Lohemann
patent: 3662290 (1972-05-01), Elliott
patent: 3900823 (1975-08-01), Sokal et al.
patent: 4066965 (1978-01-01), Schultz et al.
patent: 4392245 (1983-07-01), Mitama
patent: 4563775 (1986-01-01), Yokosuka

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