Radio transmitter
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United States of America Patent
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-
Oct 20, 1998
Grant Date -
N/A
app pub date -
Jun 21, 1996
filing date -
Jun 27, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A variable gain amplifier of a transmitter is controlled to obtain optimum transmission power by using a directional coupler and a detector to detect the transmission signal level that is then subtracted from a reference signal corresponding to a desired transmission signal power. The subtracted output is used to control the variable gain amplifier. The reference signal is generated by a control circuit and a digital-to-analog convertor that produce an attenuated basic reference signal. The attenuated basic reference signal is further adjusted in signal level by a voltage divider network that is controlled by a number of control signals produced by the control circuit.
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Cited Art Landscape
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