phase shift

Hi thmoson,

If what you desire is a 90 degree lag in the 0.1 Hz tone for Channel 1, you can use a Quadrature VCO. This block has the two outputs you need built-in. It just needs a DC input to set its frequency, which is:

Vin = 2 * frequency /fs = 2 x 0.1 / 48000 = 4.16............. x 10^(-6) = .004167 x 0.001

I added the gain block just to make the DC input entry easier.

I couldn't test this idea because the Quadrature VCO is not available for my hardware (the humble ADAU1701). Hope it works for you.

Best regards.

Bob

Hi thmonson,

Did my post above work for you, or do you need a different solution?

Bob

Dear bob :

thanks for your full support and sorry for reply you so late

your suggestion is useful to our solution

thomson wang