Around a year ago I simulated several precision rectifiers in LTSpice and they seemed to have a reasonable output.
Lately I repeated the simulation and found that the output is not like in the past: minimums take, alternatively, values of +0.2V and -0.4V. Maximum always 1.5 V.
I went to the LTSpice group where I was told that my circuit worked "out of the box". But I am still having the mentioned Vout.
Could anyone simulate the three attached circuits and tell the outcome? I did with three consecutive updated versions of LTSpice, so I do not think the problem comes from there.
I am asking this, because from the eight different circuit tested, all have a similarly flawed Vout.
Thanks for any help here.
Lately I repeated the simulation and found that the output is not like in the past: minimums take, alternatively, values of +0.2V and -0.4V. Maximum always 1.5 V.
I went to the LTSpice group where I was told that my circuit worked "out of the box". But I am still having the mentioned Vout.
Could anyone simulate the three attached circuits and tell the outcome? I did with three consecutive updated versions of LTSpice, so I do not think the problem comes from there.
I am asking this, because from the eight different circuit tested, all have a similarly flawed Vout.
Thanks for any help here.