Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent
1990-02-20
1992-12-29
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
4552471, 4552481, 358174, H04B 110
Patent
active
051758830
ABSTRACT:
A receiving apparatus according to the present invention comprises a high frequency amplifying circuit for amplifying a signal received from an antenna by a gain in accordance with a control signal, a frequency conversion circuit for converting the output frequency of the high frequency amplifying circuit, a narrow band filter for selectively passing therethrough the intermediate frequency signal components of the output of the frequency conversion circuit, and control signal generating circuit for generating a control signal in accordance with the output level of the frequency conversion circuit. The control signal generating circuit is so constructed that the control signal generating circuit outputs the control signal only when the output signal level of the frequency conversion circuit is higher than a level in accordance with the level of the narrow band filter.
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Turner, Chris: Modern hf Receiver Design, Part I, Communications Engineering International, Jun. 1982, S. 19, 22-23, 25, 27.
Charouel Lisa
Eisenzopf Reinhard J.
Pioneer Electronic Corporation
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