AUTOMATIC TUNER OF TRANSMISSION CHANNEL COMBINER USED FOR MOBILE COMMUNICATION BASE STATION USING PHASE COMPARATOR

摘要

PURPOSE: An automatic tuner of a transmission channel combiner used for mobile communication base stations using a phase comparator is provided to allow a filter to be automatically tuned with a designated channel frequency even when a frequency of an input signal is changed or a tuning point is changed by temperature or humidity. CONSTITUTION: An automatic tuner of a transmission channel combiner used for mobile communication base stations using a phase comparator includes a channel filter having a tuning control device at one side thereof, a phase difference comparator which is connected to the input/output port of the channel filter to accept input/output signals and generates a DC signal corresponding to a phase difference of the input/output signals, a control module for receiving the DC current from the phase difference comparator to generate a control signal for controlling the tuning control device, and a tuning control device driver for receiving the control signal from the control module to control the tuning control device of the channel filter.