| 摘要 |
PURPOSE:To attain a switching circuit which detects and displays both constinuous wave and discontinuous wave modes, and the superimposition of both modes, by using two multivibrators different in set time. CONSTITUTION:To a terminal 1 a continuous DC signal, a discontinuous DC signal and a signal superimposed with these signals are applied. At the leading edge of the input signals, multivibrators(MB) 16, 17 output to a terminal Q' via a differentiating circuit 11 and an amplifier 10 to turn on switches 12, 14. When the input signal is the continuous wave, the MB17 outputs to a terminal Q after a prescribed time and sets a path 1 by turning on and off switches 13, 14 respectively. When the input signal is the discontinuous wave, the MB17 whose time is set slightly longer than the pulse width of discontinuous wave keeps output to the terminal Q' to set a path 2. The MB16 is set to a time shorter than the pulse width of the discontinuous wave and holds the peak value of the input signal in a peak holding capacitor 18. When the input signal is the superimposed signal, the path 2 is set, the capacitor 18 holds the peak value of the superimosed signal and this is outputted to a terminal 2. |
