Question
Download Solution PDFAn Op-Amp as a voltage follower has a voltage gain of
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFVoltage Follower:
- 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:
For voltage follower, Rf is 0
Hence gain (A) = 1
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