Transmitter having automatic level control function

Details Transmitter having automatic level control function Transmitter having automatic level control function

1994-01-28

1997-04-29

Chin, Wellington

Pulse or digital communications

Transmitters

332107, 455126, 455115, 375296, H04L 2708

Patent

active

056256477

ABSTRACT:
A transmitter having an automatic level control function, which includes a modulator for modulating a carrier by a baseband signal, a variable attenuator for outputting a modulated wave controlled to a certain level, a detector for detecting the modulated wave, and a subtractor for controlling the gain of the variable attenuator in accordance with the difference in level between the detected output level and the reference level and also is provided with an operating unit for applying an operation for matching with the detection characteristic of the detector to the baseband signal for producing the reference level, whereby it is possible to prevent a peak with a large level from occurring at the head of the bursts when transmitting burst signals (modulated waves).

REFERENCES:
patent: 4675880 (1987-06-01), Davarian
patent: 5113525 (1992-05-01), Andoh
patent: 5170415 (1992-12-01), Yoshida et al.
patent: 5247542 (1993-09-01), Onodera et al.
patent: 5265127 (1993-11-01), Betts et al.
patent: 5293406 (1994-03-01), Suzuki

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