akbarza
Full Member level 2
hi
i have a question and thanks if answer to me.
in wikipedia if you search for phase margin, you find this statment:
More generally, PM is defined as that of the amplifier and its feedback network combined (the "loop", normally opened at the amplifier input), measured at a frequency where the loop gain is unity, and prior to the closing of the loop, through tying the output of the open loop to the input source, in such a way as to subtract from it.
can any one explain it to me?
i always did for measuring phase margin of an opamp, after simulation in open_loop case , i calculated phase margin of frequency where gain of open -loop amplifier was equal 1 .
thanks
i have a question and thanks if answer to me.
in wikipedia if you search for phase margin, you find this statment:
More generally, PM is defined as that of the amplifier and its feedback network combined (the "loop", normally opened at the amplifier input), measured at a frequency where the loop gain is unity, and prior to the closing of the loop, through tying the output of the open loop to the input source, in such a way as to subtract from it.
can any one explain it to me?
i always did for measuring phase margin of an opamp, after simulation in open_loop case , i calculated phase margin of frequency where gain of open -loop amplifier was equal 1 .
thanks