Radio communication apparatus with expanded dynamic range

Telecommunications – Transmitter and receiver at separate stations – With control signal

Patent

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Details

4552262, 455311, 455341, H04B 116

Patent

active

056898142

ABSTRACT:
Part of a first signal path for amplifying a signal includes circuits for detecting a signal, and a second signal path connected to an input portion of the first signal path includes circuits for detecting the signal. A signal strength detector circuit adds outputs from the respective detector circuits in the first and second signal paths. The first signal path has a function of expanding the dynamic range in a smaller signal region as compared with the second signal path, while the second signal path has a function of expanding the dynamic range in a larger signal region as compared with the first signal path. When a radio transmitted output is variably controlled in a radio transmitter section based on a field strength detection output for a received signal, the transmitted output is optimized, resulting in minimizing consumed power and unnecessary radiation of radio waves.

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Hitachi Review, vol. 42 No. 3, Jun. 1993, "Mobil Communication System: Its Semiconductor Technology", pp. 95-124.

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