| 摘要 |
PURPOSE:To obtain excellent reproduced signals by expanding allowable ranges of frequency variation and duty variation by triggering at fixed timing cascaded monostable multivibrators by using the output signal of a cassette tape recorder. CONSTITUTION:On the basis of frequency signal of logic ''1'' and logic ''0'', a clock signal of period T and period 2T are generated at 11; monostable multivibrator 12 is triggered by the clock signal to output clock (c) of time width longer than period T and shorter than period 2T and monostable multivibrator 13 is also triggered by the clock (c) to generate output (d) of time width longer than period 2T. Reproduction outputs of logic ''1'' and logic ''0'' are obtained by this output(d). |
