Radio transceiver including transmitter power control circuit

Details Radio transceiver including transmitter power control circuit Radio transceiver including transmitter power control circuit

1996-11-01

1998-11-03

Eisenzopf, Reinhard J.

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

455115, H01Q 1112

Patent

active

058323740

ABSTRACT:
The invention relates to a radio transceiver having a high-frequency output stage and a control circuit for controlling the transmitter power, in which the control circuit is supplied with an actual voltage in the form of a signal derived from the transmit signal. Especially in handheld radios the environment of the antenna is affected by the position of the unit, so that antenna mismatches constantly occur. This can disturb the proper operation of state-of-the-art power control circuits. To avoid such interference, the invention proposed to supply as an actual value to the control circuit a signal which is tapped prior to the signal being supplied to the high-frequency power amplifier output stage.

REFERENCES:
patent: 4602218 (1986-07-01), Vilmur et al.
patent: 4737733 (1988-04-01), La Prade
patent: 5126688 (1992-06-01), Nakanishi et al.
patent: 5144258 (1992-09-01), Nakanishi et al.
patent: 5383223 (1995-01-01), Inokuchi
patent: 5404586 (1995-04-01), Ishiguro

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