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STD Inverting 0-20V signal from +/-15V powered opamp (simulation)
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License: Public Domain
Description
A simple simulation adapted from the [YouTube video](https://youtu.be/F9w5r5l0J8Y) 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.
Design Drawing
schematic diagram
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1. DC block transient analysis
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2. Inverting amplifier transient analysis
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3. DC offset adder transient analysis
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0. System transient analysis
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| 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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