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Select the specifications that implies the inverting amplifier?

(a) V1 = -3v, V2 = -4v

(b) V1 = -2v, V2 = 3v

(c) V1 = 5v, V 2 = 15v

(d) V1 = 0v, V2 = 5v

The question was asked in a dream while sleeping

Enquiry is from Block Diagram Representation of Feedback Configurations in section Operational Amplifier Characteristics of Linear Integrated Circuits

1 Answer

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by (6.5k points)

In an inverting amplifier configuration, the input signal is applied to the inverting input (typically through a resistor), and the output signal is inverted relative to the input.

For the inverting amplifier, the output voltage will be the negative of the input, meaning:

  • If the input voltage increases, the output voltage will decrease.
  • If the input voltage is positive, the output will be negative, and vice versa.

Now, let's analyze the options:

  • (a) V1 = -3V, V2 = -4V: This shows both input voltages are negative. While it doesn't directly imply an inverting amplifier, the sign of the output voltage in a real inverting amplifier would be inverted relative to the input signal, which could match this scenario.

  • (b) V1 = -2V, V2 = 3V: This could represent an input where the signal polarity is flipped (inverting operation), so the output voltage would be the inverse of the input.

  • (c) V1 = 5V, V2 = 15V: This would represent a non-inverting amplifier configuration since the output would be a scaled version of the input (without inversion).

  • (d) V1 = 0V, V2 = 5V: This indicates a potential non-inverting configuration (zero input on the inverting terminal), so this is not an inverting amplifier setup.

Based on this analysis, option (b) V1 = -2V, V2 = 3V is the best representation of the inverting amplifier configuration since it implies an inversion between the input and output.

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