Other

Christopher N Smith

Robert O Bristow

Robert J Emslie

An automatic gain control system handles inphase and quadrature phase signals, and is for use in digital cellular radio receiver equipment. The system comprises an inphase signal path and a quadrature phase signal path, each path including a logarithmic attenuator, the inphase and quadrature phase signal paths each including a feedforward path including a logarithmic detector. The output of the detectors are compared by respective comparators with an analogue signal, and output signals from the comparators are arranged to control a counter arrangement which generates a data word which is used to control the performance of the logarithmic attenuators.

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Rownhams, Southampton, United Kingdom

Christopher N Smith