Patent ID: 7795974
Filing Date: 2010-09-14
Classification: H03F,H03G

Abstract:
1. A digitally variable gain amplifier, comprising: a front-end amplification stage comprising a plurality of gain blocks, wherein the gain blocks are configured to be driven in parallel by a differential input signal that is continuously connected to input terminals of each gain block during amplifier operation; a selection stage configured to receive a signal from each gain block during amplifier operation; and an output stage configured to receive and condition a differential signal from the selection stage; wherein one gain block of the plurality of gain blocks is configured to be placed in an active mode to amplify the differential input signal and each remaining gain block of the plurality of gain blocks is configured to be placed in a standby ready mode, and wherein the selection stage is configured to automatically select the amplified differential input signal from the one gain block that is in the active mode from the received signals.