निम्न में से कौन सा सही ऑप-एम्प वोल्टेज अनुगामी है?

Voltage follower:

• The Voltage follower circuit is a non-Inverting Amplifier that has negative feedback.
• A voltage follower is an op-amp circuit whose output voltage straight away follows the input voltage. i.e. output voltage equivalent to the input voltage.
• The Op-amp circuit does not provide any amplification thus, its voltage gain is unity.
• The voltage follower is used as a buffer amplifier, isolation amplifier, unity gain amplifier as the output follows the input.
• The voltage follower provides no alternation or no amplification but only buffering.

Characteristics:

• High input impedance
• Low output impedance
• Current Gain & power gain high
• Voltage gain unity

Derivation:

The Voltage follower circuit is a Non-Inverting Amplifier that has negative feedback.

The gain of Non-Inverting Amplifier is given by:

\(A = 1 + \frac{{{R_f}}}{{{R_1}}}\)

For voltage follower, Rf is 0

Hence gain (A) = 1