Non-inverting amplifier - LM358N

[GregaryB]

According to all that I have read this is the correct way to implement a non-inverting amplifier.

So why is the positive phase of the input signal being clipped in this multism version of the circuit?

If you have to do something odd in multism to get this to work properly, that you don't have to do in real life electronics, then what is the point of using multism at all?

[johnsold]

GregaryB,

Most likely a real life circuit wired this way would clip also.  You do not provide a DC path for the bias current to the non-inverting input.  Eventually that bias current, although small, would charge C1 to the point where the signal would clip or the amplifer would stop working because the voltage went outside the common mode range.

Put a 1 megohm resistor to ground at the non-inverting input.  That will give you a 1.6 Hz low frequency corner.  I do not recall the bias current specification for the LM358 but it is an FET input device so the current should be low.  You might be able to use a larger resistor value.

Lynn