| 摘要 |
PURPOSE:To simplify hardware and change a delay time to change the angle of polarization, by exciting 17 oscillators by one ring counter and one decoder and controlling a clock pulse generating source. CONSTITUTION:When signal ''1'' is given as a control signal 9 to one input terminal of a gate G1 and a clock pulse 7 is inputted to the other input terminal, a ring counter 6 starts counting, and output ''1'', namely, a pulse output is generated in output terminals D1, D9 of a decoder 8 successively. If the terminal D1 is connected to an oscillator A9 and the terminal D2 is connected to oscillators A8 and A10 and succeeding terminals are connected to oscillators similarly, the oscillator A9 is first excited, and oscillators A8 and A10 are next excited, and the terminal D9 excites oscillators A1 and A17 finally; and this cycle is repeated in accordance with the operation of the ring counter. As the result, 17 oscillators are execited with one ring counter and one decoder; and clock pulses are changed for changing the delay time to change the angle of deflection, and the clock pulse generating source is controlled to change clock pulses easily. |
