geozog86
Member level 3
Hello!
After simulate this simple amp (all properly biased), I simulated the graph on the right hand side: Looks like for the low freqs, it's got a PSR of 0dB (ac disturbance in supply, measuring ac at the output).
Isn't that weird? Doesn't 0dBs mean that transistor 3 acts as a resistor? Can someone explain to me the theory behind that? Could be something really basic that I neglect/haven't understood. There was no load in the simdeck (it was just the circuit drawn, nothing connects to output)
I AM CONFUSED
Thx
![photo.JPG photo.JPG](https://www.edaboard.com/data/attachments/52/52963-63cfe64bf1057b87d316cd86eeeeb9a7.jpg)
After simulate this simple amp (all properly biased), I simulated the graph on the right hand side: Looks like for the low freqs, it's got a PSR of 0dB (ac disturbance in supply, measuring ac at the output).
Isn't that weird? Doesn't 0dBs mean that transistor 3 acts as a resistor? Can someone explain to me the theory behind that? Could be something really basic that I neglect/haven't understood. There was no load in the simdeck (it was just the circuit drawn, nothing connects to output)
I AM CONFUSED
Thx
![photo.JPG photo.JPG](https://www.edaboard.com/data/attachments/52/52963-63cfe64bf1057b87d316cd86eeeeb9a7.jpg)