| 摘要 |
PURPOSE:To switch for kinds of signals with simple constitution, by using a pulse having a pulse width a half the period of pulse and another pulse shifting the pulse by 1/4 period. CONSTITUTION:Four kinds of signals e,f,g,h are inputted to two-signal switching devices 12, 13 for each two signals (e,f, and g,h), and one signal is selected at a two-signal switching device 15 out of two signals j,k selected from the four signals. The timing of switching is executed at each 1/4 period, because the input pulse has the pulse width of 1/2 period and 90 deg. phase-shift is performed (1/4 period). For example, at the first 1/4 period, the e,g are selected as the signals j,k(i=1) and the k(i.e. g) is selected at an output 10(l=0). At the 2nd 1/4 period, the j(i.e., e) is selected (l=1). At the 3rd 1/4 period, the f,h are selected as the j,k(i=0) and the j(i.e., f) is selected as the output 10(l=1). At the final 1/4 period, the k(i.e., h) is selected (l=0). |
