mhelin
Well-known member
Another newish OEP transformer for mic pres. The mic pre in data sheet first looks like a conventional transformer followed by two opamp gain stages except that the first stage is quite an unusual. Could someone explain how it works (both inputs of the first stage's opamp are connected to Vee, and it seems like the Vcc and Vee pins are used as inputs), and what is the function of S1?
http://docs-europe.origin.electrocomponents.com/webdocs/0d72/0900766b80d72895.pdf
http://docs-europe.origin.electrocomponents.com/webdocs/0d72/0900766b80d72895.pdf