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Operation amplifier venturi filter circuit diagram

2017-02-25 00:42  
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Operation amplifier venturi filter circuit diagram
For all frequencies venturi filters are the same gain, but it can change the angle of signals, it also can be used for angle correction circuit at the same time. Circuit has a 90 degrees' phase shift on the signal frequency F,a0 degree's phaseshifton dc, and a 180 degrees' phase shifton the high frequency.