Patent ID: 7457598
Filing Date: 2008-11-25
Classification: H03G,H04B,H04W,Y02D

Abstract:
1. A signal amplifier system for a mobile broadcast receiver comprising: an operational circuitry coupled to an antenna for receiving an incoming broadcast signal from the antenna and applying a variable gain to the incoming broadcast signal and outputting a resultant broadcast signal; a tuner which receives the resultant broadcast signal and determines a field strength of the resultant broadcast signal; a comparator which receives a field strength signal representative of the field strength of the resultant broadcast signal from the tuner and compares the field strength signal with one or more threshold values and generates a supply voltage control signal; and a supply voltage control circuit which generates a plurality of different supply voltages and outputs a selected supply voltage of the plurality of supply voltages to the operational circuitry based on the supply voltage control signal; where the selected supply voltage is provided as a power supply voltage to the operational circuitry and changes an operational characteristic of the operational circuitry; where the selected supply voltage is proportional to the field strength of the resultant broadcast signal and the selected supply voltage applied to the operational circuitry is lowered if the field strength of the received incoming broadcast signal is lower than a selected threshold.