Patent ID: 7222037
Filing Date: 2007-05-22
Classification: H03M

Abstract:
1. An apparatus, comprising: an interface for receiving an incoming analog signal; an overall gain determinator coupled to the interface arranged to determine an overall gain factor and an automatic gain controller to determine a coarse analog gain control value and a fine digital gain control value, each of which, applied in cascade equals the already determined overall gain factor; an analog multiplier coupled to the overall gain determinator used to modify the incoming analog signal using the coarse analog gain control value to form a coarsely adjusted digital signal; an analog to digital converter (ADC) coupled to the overall gain determinator for digitizing the coarsely adjusted digital signal; and a digital multiplier coupled to an output of the ADC arranged to use the fine digital gain control value to process the coarsely adjusted digital signal to form an outgoing digital signal, wherein the outgoing digital signal has been modified in both the analog domain and subsequently in the digital domain to achieve an appropriate signal to noise ratio.