Automatic gain control amplifier control circuit

Abstract

An AGC amplifier control circuit applying for both transmission and reception which the quantity of data memorizing in a memory is decreased and the address of the memory is simplified is provided. The AGC amplifier control circuit provides RF attenuators controlled in hysteresis and these RF attenuators are driven at the next gain renewing time of AGC amplifiers and provides attenuation controllers outputting the information whether the RF attenuators have a fixed attenuation quantity or not. In this construction of circuit, memories memorize the control voltage data of the gain of the AGC amplifiers with the relation of desired outputs, at the time when the RF attenuators are driven and have a fixed attenuation quantity, data conversion circuits convert the data to make the gain of the AGC amplifiers increase corresponding to these attenuation quantities. Therefore, to the address of the memories, by using the value which the transmitting level or the receiving level is converted in consideration of the attenuation quantity of attenuators, the quantity of the data memorizing in the memories are saved in small and the quantity of the data is able to be reduced.

Dependencies are inferred from the claim text.