Hi!
I would like to use current source for the input stage and for the VAS of my amplifier, and I see different implementations of these, but I don't realy understand what it does change...
When using current sources for the input stage and for the VAS, with a transistor used for voltage reference, sometimes the base of this transistor is connected on the emiter of the LTP curent source transistor, sometimes it is on the VAS one. Could someone explain me what difference does it make please?
Also, resistors are sometime used on the base of one or more of those three transistors. Randy Slone write 1k is a good value, but I haven't find any further information about this. What is their purpose please?
Thanks a lot for your help!
Please apologise my poor English.
I would like to use current source for the input stage and for the VAS of my amplifier, and I see different implementations of these, but I don't realy understand what it does change...
When using current sources for the input stage and for the VAS, with a transistor used for voltage reference, sometimes the base of this transistor is connected on the emiter of the LTP curent source transistor, sometimes it is on the VAS one. Could someone explain me what difference does it make please?
Also, resistors are sometime used on the base of one or more of those three transistors. Randy Slone write 1k is a good value, but I haven't find any further information about this. What is their purpose please?
Thanks a lot for your help!
Please apologise my poor English.