Patent ID: 6535719
Filing Date: 2003-03-18
Classification: H04B,H04H

Abstract:
A frequency modulating (FM) transmitter, comprising:a reference frequency generator for generating a reference frequency; a reference frequency divider for frequency dividing said reference frequency; a stereo modulation circuit for frequency modulating a right audio signal and a left audio signal by using one output of said reference frequency divider to supply resultant stereo modulated signals as FM signals; an oscillator circuit for generating carrier waves to transmit said FM signals received from said stereo modulation circuit; a program counter for frequency dividing said carrier waves into variable frequency components; and a PLL frequency synthesizer which has a phase comparator circuit for comparing said variable frequency components output from said program counter with another output of said reference frequency divider to provide at an output end of said PLL frequency synthesizer a control signal for controlling said oscillator circuit.