| 摘要 |
PURPOSE:To make a radio-system remote control unit small-size and economic furthermore by comparing a key code from a transmission unit with a selfset key code in a receiving unit and detecting agreement between them to drive an operation unit. CONSTITUTION:A transmission unit is constituted by shift register 4 which stores a binary code set by turning-on and off of the switch of key code set means 5, pulse generator 1 which generates synchronizing pulse P, synchronizing pulse superposing circuit 6 which superposes synchronizing pulse P onto the key code signal outputted from register 4, and 1/16 frequency divider 3 which controls register 4. A receiving circuit detects receiving signals and separates synchronizing pulses by 16 and checks presence or absence of signal pulses and stores key code contents in shift register 17 and compares the contents above with key code set contents of key code set means 18 and generates a coincidence signal when they agree with each other. |
