Patent ID: 7907922
Filing Date: 2011-03-15
Classification: H04B,H04N

Abstract:
1. A receiver implemented without using a phase locked loop frequency synthesizer, the receiver comprising: a radio frequency (RF) receiving unit which receives an RF signal; a band-selecting unit which passes a frequency band of the RF signal received by the RF receiving unit; an RF amplifier which receives and amplifies the RF signal which is passed by the band-selecting unit; a local oscillation (LO) signal generator which generates an LO signal having a fixed frequency; a mixer which mixes the LO signal with the amplified RF signal to lower the frequency of the amplified RF signal, and outputs the mixed signal as an intermediate frequency (IF) signal; an IF amplifier which receives and amplifies the IF signal; an analog to digital (A/D) converter which converts the IF signal amplified by the IF amplifier into a digital signal; a channel-selecting unit which selectively passes frequencies of the digital signal corresponding to a specific channel; and a digital demodulator which demodulates a signal corresponding to the frequencies selectively passed by the channel-selecting unit, and outputs a control signal to control the channel-selecting unit, wherein the frequency band denotes a frequency band assigned to a wireless communication method of a main body coupled to the receiver.