Patent ID: 8605836
Filing Date: 2013-12-10
Classification: H03G,H04B,H04L

Abstract:
1. An apparatus comprising: an automatic gain control (AGC) controller configured to provide a control signal that indicates an average power of a baseband signal; a digital gain computation unit coupled to the AGC controller, the digital gain computation unit configured to receive the control signal from the AGC controller and to select a digital gain such that the average power of an output signal from a digital variable gain amplifier is maintained at a reference power level; at least one processor configured to select a first gain for analog circuitry from among multiple discrete gain values and to select a second gain for the DVGA, wherein the first gain maintains average power of the baseband signal within a predetermined range at an input of an analog-to-digital converter (ADC), and wherein the second gain maintains the average power of the output signal from the DVGA at the reference power level, wherein the multiple discrete gain values are associated with multiple gain states, wherein each gain state except for a lowest gain state with a lowest analog gain is associated with a respective high threshold used for selecting a next lower gain state, and wherein each gain state except for a highest gain state with a highest analog gain is associated with a respective low threshold used for selecting a next higher gain state; and a memory coupled to the at least one processor.