| 摘要 |
<p>PURPOSE:To attain easily the phase shift at a prescribed phase shift angle by changing one of amplitudes in two pulse signals where the phase to be synthesized is different by 90 deg.. CONSTITUTION:A signal source 21 outputs a pulse signal P0. A phase shifter 22 produces two pulse signals P1, P2 having different phase by 90 deg. by using the signal P0. Phase inverting circuits 25, 26 produce two pulse signals where the edge phase is always different by 90 deg. at each region where the phase range of 0 deg.-360 deg. is divided equally into four by inverting properly the signals P1 and P2. A signal having a lag phase in the two pulse signals having phases different by 90 deg. is applied to the 2nd weighting circuit 29 at the first half of each region dividing the range of 0 deg.-360 deg. equally into four and its amplitude is subject to change. Further, a signal having a lead phase in the two pulse signals is applied to the 2nd weighting circuit 29 at the latter half of each region and its amplitude is subject to change.</p> |
