| 摘要 |
PROBLEM TO BE SOLVED: To provide a remote control reception circuit capable of performing stable demodulation operation to disturbance noise at a low operating power voltage. SOLUTION: In the remote control reception circuit, an integration circuit provided between a wave detection circuit 6 and a comparing circuit 9 consists of a first integration circuit 11 and a second integration circuit 12 connected to the input of the circuit 9, the integration time constant of the circuit 11 is set to be smaller than that of the circuit 12 and the two integration circuits are separated by the PN connection of a transistor Tr- B. Thus, with respect to the diffused noise of an inverter fluorescent lamp, etc., the noise removing ability of a demodulation circuit is improved to stabilize a demodulation pulse. As a result, it is possible to realize an excellent remote control receiver capable of extending a maximum receiving range by preventing malfunction in the case of receiving a remote control signal under noise environment. |
