| 摘要 |
<p>PURPOSE:To prevent the obtained frequency shift signal from being affected by a constant of a phase shifter. CONSTITUTION:An output carrier signal from an oscillator 1 is squared and the squared signal is phase-shifted by 90 deg. and then the result is given to a master slave TFF circuit 7, in which the frequency of the signal is 1/2-frequency- divided. Two kinds of signals whose phase difference is 90 deg. are obtained from the TFF circuit 7, one of them is fed to a summing point 1c of the oscillation circuit and the other is given to a balanced modulation circuit 3, an amplitude modulation signal amplitude-modulated by the input signal is given to the summing point 1c, in which vector synthesis is conducted.</p> |
