Hello,
This circuit is a Hilbert transformer from ARRL Handbook, that I want to use it with MC1496 balanced modulator to generate SSB from DSB via phasing method.
The Hilbert filter generates a 0 , 90 , 180 and 270 degree phase shifting for the op amps and finally we will have a 0 and 90 degree phase shift at the output of op amps(which I want to use a TL072 op amp at 12V single supply).
Now I wanted to know if the wiring is correct for the input of op amps or not?
I think there is a problem because it seems that the + and – of an op amp is connected too 0 and 180 degree and the input of the other op amp is connected to 90 and 270 degree pin? So how we can have a 90 degree phase shift at V3 and V4(outputs of the op amps)?
Another question is that I have heard that a Hilbert transformer is working fine at the range of 300 to 3000 or 3500Hz, if so, can an expert let me know how it works on voice Communications!?
Thanks for any help.
C1: 0.044 uF, C2:0.033 uF, C3: 0.02 uF, C4: 0.01 uF, C5: 5600 pF, and C6: 4700 pF AND all resistors are 12K ohm 10%