OSCILLATOR FOR REMOTE CONTROL

摘要

PURPOSE:To make the period of a remote control self-running oscillator by variation in pulse voltage constant and utilize fly-back pulses for a pulse power source by providing a bias circuit which holds the gate voltage of an (n)-gate SCR constant. CONSTITUTION:Then oscillator for remote control used for a TV receiver, etc., is provided with the (n)-gate SCR8, and a charging and discharging circuit 2 is connected to the gate of the SCR8 and charged by a constant voltage power source 1. A rectifying circuit 4 and a controlled system 3 are connected to the gate of the SCR8 and the output voltage from the circuit 4 is converted by an impedance converter 5 connected to a remote control switch circuit 6. This converter 5 is supplied with a pulse voltage from a pulse power source 7. A bias circuit 9 is provided between the constant voltage power source 1 and the connection point of the gate of the SCR8 and the circuit 4. Then, the period of the remote control self-running oscillator by variation in pulse voltage is held constant and fly-back pulses are utilized for the power source 7.