Hello, I am very new to such a good forum as this. I have a question to ask; I am using an AD620ANZ amplifier and I am getting the correct output voltage that I expected. However, there is an additional offset of about 7vdc and I do not know why and where it has come from. Does anyone know why I am getting this dc offset (7vdc)? I am using 9v power supply. Also, I am using the V-F converter (lm331) and by the time I connect the my desired output voltage+ that particular dc offset; the V-F converter converts the dc offset to frequency but seems to ignore my actual desired input voltage. I added a dc offset to that AC signal in order for it to work with the V/F converter but to no avail.
Thank you very much in advance.What range of frequency are you looking for?