| 摘要 |
PURPOSE:To reduce the change in the phase characteristic in a phase shift circuit by coupling an input and an output terminal with a resistor or a capacitor and connecting a series circuit comprising a capacitor and a resistor between the output terminal and a reference position. CONSTITUTION:The input terminal 3 and the output terminal 4 are coupled by a resistor 6 and the output terminal 4 and the ground are connected by a resistor 7 and a capacitor 8. Thus, the voltage at the output terminal 4 is the sum of a voltage VC of the capacitor 8 and a voltage division of a voltage V1 at the input terminal 3 divided by the resistors 6, 7, and the change in phase angle alpha, alpha0 remains small in comparison with the change in phase angles theta, theta' of vectors DE, DE' representing the voltage across the capacitor 8 as shown in line segments DF, DF' of vector diagram in a figure. |
