Digital Phase Shifter

[kurt2]

Sir , Can anyone tell me the design of digital phase shifter 90 deg.
best regards

 

[Kevin Weddle]

The only way I know of to shift phase is to switch in a resistor in an RC circuit. You have to change the phase of the oscillator first, then turn it into a clock. Switch in the resistor with a MOSFET. In other words, the resistor goes to the drain and the source goes to the power supply. When you apply voltage to the gate, you have the supply voltage. Otherwise, you have an open. Switch in each resistor to give you a different phase.

 

[audioguru2]

Kurt,
For what is it that you need to shift the phase, audio? or video?
Over what frequency range, telephone quality? or CD quality?
For video, VHS quality? or DVD quality?

What are you making? A quadrature modulator?

Please provide as much information as you can, so that we can help you better.