| 摘要 |
PURPOSE:To provide a compact noise eliminating circuit which can be easily built into a microcomputer by using a coincidence circuit of a simple constitution that receives the outputs of shift registers set at plural stages. CONSTITUTION:The outputs of the shift registers 5a-5n are decided by a coincidence circuit 7, and 8 coincidence circuit connecting circuit 9 is provided between the outputs of the registers 5a-5n and the input of the circuit 7. That is, the coincidence circuit connecting switches 9a-9n are connected to between the registers 5a-5n and the circuit 7 as the register stage number varying means together with the coincidence circuit inputs 10a-10n. When the registers 5a-5n connected to the circuit 7 are set at the desired number of stages, the switches 9a-9n corresponding to each desired stage number are turned on. Therefore the number of stages of the registers 5a-5n connected to the circuit 7 are made to be variable. In such a constitution, a compact noise eliminating circuit is obtained. |
