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Inverting 0-20V signal from +/-15V powered opamp (simulation)

11 months ago 334
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A simple simulation adapted from the YouTube video by devttys0.

The problem is to invert a 0-20v signal using only an opamp powered by a +/-15V DC supply. The circuit can be broken down to three stages:

  1. Shifting the signal down to be +/-10V signal > Add a 0.1uF cap which will block any DC element in the signal.
  2. Inverting the signal > Use a classic inverting amplifier circuit with two 100k resistors.
  3. Shift the signal up again using a simple voltage divider. This will add back the DC element taken away from the signal.





ID Name Designator Footprint Quantity
1 15 AC 0 V4 HDR1X2 1
2 1k R5,R3 AXIAL-0.3 2
3 BZT52C10 D2 SOD123 1
4 100k R1,R2 AXIAL-0.3 2
5 SIN(10 10 10k) AC V1 HDR1X2 1
6 0.1u C1,C2 RAD-0.1 2
7 15 V2,V3 HDR1X2 2
8 2k R4 AXIAL-0.3 1
9 UA741 U1 DIP08 1


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