Which amplifier configuration would result in phase inversion of an input signal in an Operational Amplifier?

Which amplifier configuration would result in phase inversion of an input signal in an Operational Amplifier?

• A. Non-inverting configuration
• B. Inverting configuration
• C. Common base configuration
• D. Class C configuration

Answer: (B)

In an operational amplifier setup, the inverting configuration is the one that causes a phase inversion of the input signal. This occurs because the input signal is applied to the inverting terminal (-) of the op-amp. Due to the principles of how operational amplifiers function, specifically with negative feedback, the output signal will be 180 degrees out of phase with the input. When the input voltage increases, the output voltage decreases and vice versa, leading to this inversion. This property is characteristic of the inverting amplifier configuration and is widely used in circuits requiring phase shifts, such as signal processing and audio applications. The other amplifier configurations mentioned do not exhibit this behavior. The non-inverting configuration maintains the same phase as the input signal, while common base and class C configurations are more specific to different types of amplifiers and applications, often seen in RF and analog modulation contexts without a direct phase inversion characteristic.

In an operational amplifier setup, the inverting configuration is the one that causes a phase inversion of the input signal. This occurs because the input signal is applied to the inverting terminal (-) of the op-amp. Due to the principles of how operational amplifiers function, specifically with negative feedback, the output signal will be 180 degrees out of phase with the input.

When the input voltage increases, the output voltage decreases and vice versa, leading to this inversion. This property is characteristic of the inverting amplifier configuration and is widely used in circuits requiring phase shifts, such as signal processing and audio applications.

The other amplifier configurations mentioned do not exhibit this behavior. The non-inverting configuration maintains the same phase as the input signal, while common base and class C configurations are more specific to different types of amplifiers and applications, often seen in RF and analog modulation contexts without a direct phase inversion characteristic.