Patent ID: 7365664
Filing Date: 2008-04-29
Classification: H03G,H03M

Abstract:
1. Apparatus comprising: a first programmable gain amplifier arranged to amplify an analog input, a first analog to digital converter coupled to an output of the first amplifier, a second programmable gain amplifier, also arranged to amplify the analog input, a second analog to digital converter coupled to an output of the second amplifier, a digital circuit for selecting a digital output of one of the converters as an output signal and for determining if the selected output signal is outside a given range, whereby the digital circuit also determines if the gain of the first or the second programmable amplifier should be changed, and a controller for controlling the gains of the first and second amplifiers according to the outputs of the first and second converters, wherein the controller being arranged to change the gain of one of the programmable amplifiers while an output of its associated converter is not selected.