Cordless phone transmitter circuit

The circuit is composed of a frequency modulated oscillator, a frequency multiplier, an exciter, and a resonant power amplifier. The frequency multiplication times are determined by the nominal frequency of the crystal and the transmitting center frequency. The crystal frequency of the circuit crystal oscillator is 18.667MHz, and the transmitting frequency is 112MHz (this frequency corresponds to the receiving center frequency of the SN739 station).