Use of a Voltage controlled Crystal Oscillator in the base unit of a cordless telephone system two headphones.

摘要

A wireless telephone system includes a Single Base Unit (120) and at least two Earphones Remote (100, 150).The basic Unit used for transmission (288, 292 284 275, 280, 290, 294, 282, 285, 286) coupled together via a low Impedance and coupled to a single Antenna (122)And the channels of transmission include a Voltage controlled Crystal Oscillator (VCXO (Voltage controlled Crystal Oscillator) 284 286) and a triple Frequency Circuit (288, 290),Instead of a cycle (Phase Locked Loop PLL phaselocked) to maintain the Intermodulation distortion in the outputs of the amplifications of the transmitter to a minimum.