Receiver for use in remote control system

DETAILED DESCRIPTION Accordingly, an object of the present invention is to provide a receiver for use in a remote control system, which is reduced in size and which has a sharp frequency selectivity without employing any coil-capacitor type tuning circuit and without requiring any inductance adjustment, thereby overcoming the above-described problems of the prior art.
To this end, according to the present invention, there is provided a receiver for use in a remote control system which makes use of a remote control signal of a predetermined period, comprising: counter means adapted for counting received signals at a time interval synchronous with the period of said remote control signal; and judging means adapted to judge the received signal as being the remote control signal, when the counter means has counted a predetermined value in a predetermined time.
The above-mentioned predetermined value to be judged by the judging circuit is set at the number which is to be counted when the received signal is the remote control signal.
In another aspect of the present invention, there is provided a receiver for use in a remote control system which makes use of a remote control signal of a predetermined period, comprising: conversion means for converting the received signal into a digital pulse signal; pick-up means for picking up the digital pulse signal in snychronism with the period of the remote control signal, and for counting the number of times that the digital pulse signal is picked up; and judging means for judging the receive signal as being the remote control signal when the value counted by the pick-up means has reached a predetermined value in a predetermined period.
The above and other objects, features and advantages of the present invention will become clear from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.