Patent ID: 8116413

Claim:
A signal level adjusting device, for RF communication equipment arranged to received primary RF signals, said device comprising: a tuner arranged to adjust its gain according to control signals in order to adjust the level of said received primary RF signals; a demodulator arranged to generate said control signals from secondary signals representative of the adjusted signals output by the tuner and to include a level control circuit arranged to generate a first or second digital control signal respectively each time the demodulator detects a increase or decrease respectively of the level of said secondary signals, wherein the tuner includes i) a gain control circuit arranged in relation to a first or a second digital command signal to generate one of the first or second digital command signals respectively each time the tuner receives a first or second digital control signal respectively from said demodulator, and ii) a gain adjusting circuit arranged to decrease or increase the gain of the tuner by a fixed value respectively in response to circuit the first or second command signal; and an impedance circuit arranged to define a fixed high impedance value at an input of said gain control circuit, and in that said gain control circuit is arranged to stop defining a command control when an impedance value at an input of the gain control circuit is equal to said fixed high impedance value.