engineerme
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Hi, after previous help from a few very helpful members on edaboard (FvM and LvW) i have now got to a point that i am finding confusing. I have a circuit:
The gain at R6 was from an inital gain of 20db which produced a gain margin of -7.6756dB as shown in the AC analysis :
So gain required was 27.6756dB for stability, and into voltage gain = 24.198 (as shown in R6 against R5). By placing the voltage gain at R6 i produced an AC image that did not match up with -180 degrees.
Could anybody suggest what might be going wrong with my approach?
The gain at R6 was from an inital gain of 20db which produced a gain margin of -7.6756dB as shown in the AC analysis :
So gain required was 27.6756dB for stability, and into voltage gain = 24.198 (as shown in R6 against R5). By placing the voltage gain at R6 i produced an AC image that did not match up with -180 degrees.
Could anybody suggest what might be going wrong with my approach?