Calcolatore Amplificatore Differenziale
Calcola il guadagno e l'uscita di un amplificatore differenziale con op-amp.
kΩ
kΩ
V
Voltage Gain
-10.00 V/V
Gain (dB)20.00 dB
Tensione in Uscita-5.000 V
Voltage Gain vs Input Resistor (Rin)
Formula
## Inverting Op-Amp Configuration ### Formula **Gain = -Rf / Rin** **V_out = -(Rf / Rin) x V_in** The negative sign means the output is 180 degrees out of phase with the input. Input impedance equals Rin.
Esempio Risolto
Rin = 10k, Rf = 100k, input signal is 0.5 V.
- 01Gain = -100 / 10 = -10 V/V
- 02Gain in dB = 20 x log10(10) = 20 dB
- 03V_out = -10 x 0.5 = -5.0 V
Domande Frequenti
Why is the gain negative?
The inverting configuration feeds the signal to the negative input, producing a phase-inverted output.
What limits maximum gain?
The op-amp open-loop gain and gain-bandwidth product. At higher frequencies available gain decreases.
What is the input impedance?
Input impedance of an inverting amplifier equals Rin because the inverting input is a virtual ground.
Impara