| 摘要 |
PURPOSE:To exercise phase control over an output signal by varying differentially levels of input signals supplied to bases of the 1st and 2nd transistors by a control signal. CONSTITUTION:An input signal current converted by transistor 13 is further converted into a signal current, which flows through transistors 11 and 12 by being shunted. The shunting ratio is controlled by variable DC voltage source 18. When DC voltages applied to bases of transistors 11 and 12 are equal, signal currents flowing through transistors 11 and 12 are equal in level and the levels of signal currents flowing through both the transistors can be varied differentially by varying differentially levels of DC voltages to both bases. |
