Automatic power control circuit for controlling transmitting pow

Details Automatic power control circuit for controlling transmitting pow Automatic power control circuit for controlling transmitting pow

1994-02-28

1995-04-18

Mottola, Steven

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

330282, H03G 320

Patent

active

054081971

ABSTRACT:
An automatic power control circuit controls the output power of a transmitting RF signal having envelope fluctuations generated by the modulation. The circuit uses a feedback signal which is a difference signal between an envelope provided by detecting the RF output signal, and a reference voltage corresponding to the transmitting power. At this time, fluctuation components included in the envelope and generated by the modulation is removed by the use of a low-pass filter. This circuit secures the sharpness in the leading edge of the burst signal by reducing the time constant of the low-pass filter in the rise time of the burst signal and increasing the time constant of the low-pass filter in the data periods.

REFERENCES:
patent: 5144258 (1992-09-01), Nakanishi et al.
patent: 5179353 (1993-01-01), Miyake
patent: 5204637 (1993-04-01), Trinh
patent: 5208550 (1993-05-01), Iwane

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