Question

If the output saturation voltage of the op-amp is ± 13V, determine Voutpp in inverting amplifier.
ACL = -40
ACL in dB = 32.0dB
RA = 500Ω
RC = 20KΩ
VIN = 0.5 Vpp

Answer 1

Describe the output voltage.

Answer 2

First, we need to calculate the maximum output voltage that the op-amp can produce before reaching the saturation limit:

Vsat = ±13V

Next, we need to calculate the gain of the inverting amplifier:

G = -RC/RA = -40

We can convert this to dB to find the voltage gain in decibels:

GdB = 20*log10(G) = 32.0dB

Now we can find the output voltage for a given input voltage:

Voutpp = Vin*G = 0.5*G = 0.5*(-40) = -20Vpp

However, this exceeds the op-amp's saturation limit, so the maximum output voltage will be limited to:

Voutpp_max = Vsat/G = 13/40 = 0.325Vpp

Therefore, the maximum output voltage of the inverting amplifier is 0.325Vpp.

Answer 3

The output voltage of the inverting amplifier will vary linearly with the input voltage, but with a negative gain (amplification factor) determined by the ratio of the feedback resistor (RF) to the input resistor (RIN). In this case, the gain is -40, so for a given input voltage amplitude, the output voltage amplitude will be 40 times smaller. However, in practical situations, the output voltage may be limited by the saturation voltage of the op-amp if the input signal is too large. In this case, the maximum output voltage is limited to ±13V.