| 摘要 |
PURPOSE:To obtain a sine wave phase shifting circuit by which amplitude of output voltage becomes equal to that of input voltage and phase can be varied over 0-180 deg., by providing a circuit which has connected in parallel in the reverse direction a series circuit consisting of 2 resistances and a capacitor, or a resistance and inductance, and a means for outputting a voltage difference of the middle point of said circuit. CONSTITUTION:In case of resistance R1=R2 and capacitors C1=C2, there is a phase difference of 90 deg. between voltage E1 and E2, and also the relation by which the vector sum of both the voltages is equal to input voltage Ein always holds good. In case when both the voltages E1, E2 have varied the resistances R1, R2, holding the relation of R1=R2, its phase is varied within a range of 90 deg., respectively. On the other hand, output voltage Eout is obtained as vector sum of voltage -E1 and the voltage E2, therefore, when the resistance R1, R2 are varied within an infinite range from ''0'', holding the relation of R1=R2, phase of the output voltage Eout is varied within a range of 0-180 deg. against the input voltage Ein, and also its amplitude is equal to that of the input voltage Ein. |
