Summing Amplifier Rechner
Berechnen Sie inverting summing amplifier output voltage aus multiple inputs und resistor values.
V
V
V
kΩ
kΩ
Ausgangsspannung
-6.000 V
Gain per Input-1.00 V/V
Output Voltage vs Input Voltage V1
Formel
## Inverting Summing Amplifier ### Formula (equal input resistors) **V_out = -(Rf / Rin) x (V1 + V2 + V3)** When Rf = Rin the output is simply the inverted sum. Different input resistor values allow weighted summation.
Lösungsbeispiel
Three inputs at 1 V, 2 V, 3 V with Rin = Rf = 10k.
- 01Sum = 1 + 2 + 3 = 6 V
- 02Gain = -10 / 10 = -1
- 03V_out = -1 x 6 = -6 V
Häufig Gestellte Fragen
Can I weight inputs differently?
Yes. Use different input resistors. The gain for each input is -Rf / Rn for that channel.
What is a common application?
Audio mixers use summing amplifiers to combine multiple audio signals into one output.
Why is the output inverted?
It uses the inverting configuration. Add a second inverting stage with gain -1 to restore polarity if needed.
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