| 摘要 |
PURPOSE:To obtain an optional waveform through simple operation by repeatedly selecting voltages at hole parts where pins are inserted successively in series from the 1st line, and repeating the selection from the 1st line to its leading line once a line where no pin is inserted is detected. CONSTITUTION:The input terminal P of a gate circuit G2 is inverted to release a ring counter T from being reset, and pulses appear at terminals Q0-Q7 successively by clock pulses. When an analog switch N1 turns on, a lead-out electrode goes up to a ''1'', and the pin of the 1st line connects the lead-out elec- trode to the lead-out electrode S1 of the 1st line, so that a terminal S'1 goes up to a ''1''. Then, an analog switch N9 turns on and a voltage at a terminal v1 is developed at the output terminal (t) of an amplifier A. Similarly, the 2nd-8th lines are selected successively and voltages which correspond to potisions of pins inserted into respective lines are developed at an output terminal (t) in series. |
