ElectroChas
New Member
As suggested in another thread, I built this circuit which comes from an LM324AN datasheet. It uses a bipolar supply and takes a noninverting input of ½ Vcc as the reference via voltage division.
It was also suggested that with the single supply version of this circuit that the op-amp swings from 0v to Vcc using the ½ Vcc as the "center", but when the output is viewed with an oscilloscope the square wave has a positive and negative component (of nearly equal amplitude and time period), yet the image of the circuit shows the low as 0 and not -V.
I've been pondering this circuit for some time in an effort to get a solid mental image of all its stages and I seem to be stuck on the point regarding the negative voltage output cycle.
Any explanation would be helpful.
Thank you,
Charles
It was also suggested that with the single supply version of this circuit that the op-amp swings from 0v to Vcc using the ½ Vcc as the "center", but when the output is viewed with an oscilloscope the square wave has a positive and negative component (of nearly equal amplitude and time period), yet the image of the circuit shows the low as 0 and not -V.
I've been pondering this circuit for some time in an effort to get a solid mental image of all its stages and I seem to be stuck on the point regarding the negative voltage output cycle.
Any explanation would be helpful.
Thank you,
Charles