Hey all. Attached is a schematic from the line input section of a mixer from a "big-name" brand of audio gear. Was wondering if anyone could share some info on what's up with the jfet pair (Q4208) being fed by the bipolar current mirror setup (Q4204), as well as the bipolar pair (Q4206) in this design.
The audio signal is coming into pin 4 on the 2SK3320. And why couple the op amp inputs to the power rail through the 1k resistors? bias for the BJTs on the 4580s?
interested in your analyses.
-hild
The audio signal is coming into pin 4 on the 2SK3320. And why couple the op amp inputs to the power rail through the 1k resistors? bias for the BJTs on the 4580s?
interested in your analyses.
-hild