| 摘要 |
The circuit consists of a BCD up-down counter which inputs reset pulses, clock pulses, and up-down signals in square waveforms, a 8-channel analog multiplexer which is connected with the counter through 4 control inputs, a step-like sinusoidal-wave level-voltage generating circuit whose first output and the ouput from the BCD up-down counter are connected with an analog switch, and an active filter which is connected commonly with the outputs of the 8-channel analog multiplexer and the analog switch.
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