Remote control system

摘要

A remote control system is disclosed which may gradually control a device or vary a control signal through a non-mechanical oscillation transmission system. The transmitter comprises a high-frequency oscillator, an astable multivibrator adapted to modulate the output of the high-frequency oscillator, and an element adapted to transmit the modulated output signal. The output of the element may be varied by varying the ratio of the pulse width to the pulse period of the output pulses of the astable multivibrator. The high-frequency oscillator is adapted to oscillate at a predetermined frequency which may be arbitrarily selected depending upon the device to be controlled. A receiver can discriminate the received signal so that a device to be controlled by the received signal may be detected and controlled. The discriminated signal is shaped in waveform by a wave-shaping circuit so that a DC voltage whose magnitude is the product of the amplitude of the shaped output signal and the aforesaid ratio of the output pulses of the astable oscillator, is produced to control the intended device.