| 摘要 |
PURPOSE:To simplify the operation and to prevent mis-operation, performing accurate phase adjustment with small size, by adjusting the phase purely electronically in use of a mixing circuit. CONSTITUTION:Two subcarriers with different phase are applied from input terminals 11-14, 21-24, a plurality of circuits M1-M4 mixing the subcarrier are connected in series in the ratio corresponding to a bias voltage, the bias voltage is applied in common to terminals 41-44 of the circuits M1-M4, a variable voltage is applied to terminals 51-54 so that the circuits M1-M4 can mixingly be operated in the range of different bias voltage. Thus, the phase of the subcarrier can be adjusted to an arbitrary phase by adjusting the variable bias voltage with a variable voltage source VR. |
