Patent ID: 8000756
Filing Date: 2011-08-16
Classification: H03G,H04W,Y02D

Abstract:
1. A receiver having low power consumption, wherein the receiver amplifies an ultra-high frequency signal received from an antenna by a low noise amplifier, a frequency converter down-converts a frequency of the ultra-high frequency signal for outputting a down-converted signal, a channel selection filter filters away an interference signal of the down-converted signal, and at least one programmable gain amplifier amplifies the down-converted signal for outputting a gain-amplified signal having a predetermined amplitude, and wherein a first peak detector of the receiver detects the down-converted signal before being inputted into the channel selection filter and generates a first detecting value, a first automatic gain control adjusts a gain of either the low noise amplifier or the frequency converter based on the first detecting value, a second peak detector of the receiver detects the down-converted signal after being outputted from the channel selection filter and generates a second detecting value, a second automatic gain control adjusts the gain of either the channel selection filter or the programmable gain amplifier based on the second detecting value, the receiver having a low power consumption comprising: a power consumption reducing device, determining a signal quality of the ultra-high frequency signal received from the antenna based on the first detecting value and the second detecting value, wherein the power consumption reducing device adjusts current supplied to at least one of the low noise amplifier, the frequency converter, the channel selection filter and the at least one programmable gain amplifier according to the determined result.