RECEIVER HAVING AUTO-CONTROLL FUNCTION FOR FREQUENCY BEND

摘要

A receiver having an auto-control function for a frequency band is provided to reduce a size and complexity of a circuit constituting the receiver by automatically controlling the frequency band without an additional PLL(Phase Locked Loop). A receiver having an auto-control function for a frequency band includes an RF(Radio Frequency) amplification unit(110), a signal processing unit(120), a phase detection unit(130), and a voltage comparison unit(140). The RF amplification unit amplifies an RF signal of a frequency band selected according to a control voltage among received RF signals at a predetermined size. The signal processing unit generates a plurality of signals including first and second signals with different phases for converting the RF signal from the RF amplification unit into a predetermined signal by using a predetermined reference frequency and controls the phases of the signals according to the control voltage. The phase detection unit generates a phase difference voltage corresponding to detected phase difference of the signals. The voltage comparison unit compares the phase difference voltage from the phase detection unit with the predetermined reference voltage, generates the control voltage corresponding to a difference between the phase difference voltage and the predetermined reference voltage, and transmits the control voltage to the RF amplification unit and the signal processing unit.