I’m naserturk from Turkey Istanbul
Firs accept my apology for my bad English
I’m trying to design a DDS Base function generator
I have some experience with AD9833 & AD9834
I need VGA ( Variable Gain Amplifier ) circuit for my DDS function generator output stage
I want to be able controlling output gain value digitally
Frequency of this DDS is between 10 Hz to 5 MHZ and output impedance 50 ohm
Do I need any buffer in output of DVGA circuit ?
Another question that I have is :
How can I change duty cycle of square wave and saw tooth wave digitally ?
And I know that some of analog device IC’s can help me
Can you help me to find a good IC for this output stage?
Tanks a lot for you helps