JPS5731292A - Radio remote controller - Google Patents

Abstract

PURPOSE:To obtain a stable synchronous state, by processing in links the narrow parts of the pulse duration and in the form of an ''H'' level at the receiver side in case the key code signal transmitted from the transmitter side and received a modulation of the pulse position is received. CONSTITUTION:A key code setting means is installed at the transmitter side, and the code signal set up by the setting means is coded into ''0'' and ''1'' in accordance with the front and back positions of the prescribed pulse signal to be transmitted through a transmitting antenna. At the same time, the code signal is received at a receiving antenna 30 at the receiver side, shaped at a waveform shaping part 32, supplied to a monostable multivibrator 36 constituting a clock pulse generating part 35, reversed by an inverter 37 and integrated by an integral network 38. After this, the fine pulse component contained in the transmitted pulse is eliminated through a waveform shaping part 39. Accordingly the area having a narrow pulse duration is processed as an ''H'' level, and a key code signal transmitted from the transmitter side is restored at the output terminal of an AND gate 46.