bhl777
Full Member level 6
Hi all, I have a stage to generate a AC+DC current signal, and just want to feed the generate AC signal to the next stage, would anybody advise how can I do this? A simple schematic is shown here:
There are three questions,
(1) The first stage generate a AC+DC current signal in transistor Q0, if I just need its AC component, can I simply use a dc current to bias this transistor, and use another branch as the AC signal path?
(2) If this ac signal will be the input of the second stage, what is the interface I need between these two stages? Like the orange box in this picture, if I can export the AC current signal from the first stage, how can I do to feed it to the second stage, without impacting any DC operating points?
(3) If the green box (the second stage) is a RMS-DC conversion, ideally it will generate a DC current at Q1, including both the RMS value of input AC sine signal, and the bias current of Q1. If I can force a DC current as DC1 to bias Q1, how can I export DC2 current? How can I connect with this DC2 wire for further processing?
Thank you!
There are three questions,
(1) The first stage generate a AC+DC current signal in transistor Q0, if I just need its AC component, can I simply use a dc current to bias this transistor, and use another branch as the AC signal path?
(2) If this ac signal will be the input of the second stage, what is the interface I need between these two stages? Like the orange box in this picture, if I can export the AC current signal from the first stage, how can I do to feed it to the second stage, without impacting any DC operating points?
(3) If the green box (the second stage) is a RMS-DC conversion, ideally it will generate a DC current at Q1, including both the RMS value of input AC sine signal, and the bias current of Q1. If I can force a DC current as DC1 to bias Q1, how can I export DC2 current? How can I connect with this DC2 wire for further processing?
Thank you!