| 摘要 |
PURPOSE:To eliminate the noise in the pause period and thus to prevent the malfunction of the remote control device by controlling directly the decoder input with the output of the latch circuit provided at the reception side and carrying out the control with the output of transistor element or the like in case the latch circuit features the opposite polarity. CONSTITUTION:The control signal sent from the transmission side of reception part is amplified by amplifier 2, and the pulse row detected by detector 3 is supplied to additional circuit 20 which is connected across resistor 4. Then the output of detector 3 is applied to 3rd gate 26 connected to latch circuit 28 as well as to one side of 1st gate 23 which supplies the output of pulse generator 21. And the output of generator 21 and latch circuit 24 are applied to counter circuit 22. The output of circuit 22 is applied to gate 26 to transmit the pause period signal to the output of circuit 28. Then circuit 28 is controlled by the output of circuit 22 which delivers the noise component of the pause period, and the rectangular wave from which the noise component is eliminated is applied to the input terminal of decoder 5 to eliminate the noise component. In case the output of circuit 28 features the opposite polarity, the control is given via the transistor element. |
