| 摘要 |
<p>PURPOSE:To drive a deck part mechanism through a simple circuit constitution, by outputting a desired rectangular wave corresponding to the operation of a switch for various operation modes. CONSTITUTION:When there is no input signal as shown in a figure E, the depression of one of switches S1-1-S5-1 allows a rectangular wave generating circuit 9 to generate an H-level output by pulses of a differentiating circuit 7 and the output goes to a level L on the input and returns to H a specific time later. The output of a circuit 8 is shown in a figure (c). A control circuit 10, however, operates as well, so it goes to L when there is no input signal, but goes to H with a delay before the circuit 9 goes to L when the signal is inputted, and goes to L once the output of the circuit 9 goes to H as shown in a figure A. The output of the circuit 8 is inputted to an inverter 11 and further to inverters 12 and 15; inverters 12 and 16 are applied with a voltage when a Play switch S1-2 turns on and the output of the inverter 11 is inverted and outputted to a point (b); and the output of the circuit 9 is outputted to a point (c) as well. When one of switches S1-1 is pressed, the output at the point (c) is as shown in a figure B and a rectangular wave shown in the figure A appears at the point (b) to drive the mechanism.</p> |
