Patent ID: 8208883
Filing Date: 2012-06-26
Classification: H03G

Abstract:
1. A receiver with low power consumption, wherein the receiver comprises a low noise amplifier, a frequency converter, a channel selection filter, a programmable gain amplifier and an intermediate frequency automatic gain control, and the low noise amplifier amplifies an ultra-high frequency signal received from an antenna, the frequency converter down-converts a frequency of the ultra-high frequency signal for outputting a down-converted signal, the channel selection filter filters away an interference signal from the down-converted signal, and the programmable gain amplifier amplifies the down-converted signal from the channel selection filter for outputting a gain-amplified signal having a predetermined value, and the intermediate frequency automatic gain control generates intermediate frequency automatic gain control information based on an inputted signal of the programmable gain amplifier to adjust the gain of the programmable gain amplifier, the receiver comprising: a current-adjusting unit coupled to the intermediate frequency automatic gain control and the programmable gain amplifier, for receiving the intermediate frequency automatic gain control information, and for determining an optimal gain bandwidth product of the programmable gain amplifier according to the intermediate frequency automatic gain control information and a predetermined bandwidth in order to adjust the current provided for the programmable gain amplifier based on the optimal gain bandwidth product, wherein the optimal gain bandwidth product comprises a first gain bandwidth product and a second gain bandwidth product which is less than the first gain bandwidth product based on the predetermined bandwidth.