Operational amplifier is a

Options

A. Digital IC
B. Linear IC
C. OR gate
D. AND gate

Answer

**Step-by-Step Solution:**

1. **Definition of Operational Amplifier**: An operational amplifier (op-amp) is a type of electronic amplifier that is designed to amplify voltage signals. It is characterized by its high input impedance and low output impedance.

2. **Functionality of Operational Amplifier**: The primary function of an operational amplifier is to amplify the difference between two input voltages. This means it takes a small input voltage and produces a larger output voltage without changing the phase of the signal.

3. **Linear Integrated Circuit**: An operational amplifier is categorized as a linear integrated circuit (IC). This means it operates in a linear manner, where the output is directly proportional to the input. Unlike digital circuits, which operate in binary states (0 or 1), linear ICs can produce a continuous range of output values.

4. **Characteristics of Operational Amplifier**:
- **High Input Impedance**: This allows the op-amp to draw minimal current from the input signal source, preventing loading effects.
- **Low Output Impedance**: This allows the op-amp to drive loads effectively without significant voltage drop.
- **No Phase Change**: The output signal maintains the same phase as the input signal, which is crucial in many applications.

5. **Conclusion**: Based on its characteristics and functionality, the operational amplifier is best described as a linear integrated circuit.

**Final Answer**: An operational amplifier is a linear integrated circuit (IC) that amplifies voltage signals without changing their phase.

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