Electrical

Voltage Follower: The Ultimate Buffer

Electrical Diagrams · made in Skemio

Circuit ladder diagram depicting a 5V DC signal source feeding a protective resistor and buffered line into a precision voltmeter.
Circuit ladder diagram depicting a 5V DC signal source feeding a protective resistor and buffered line into a precision voltmeter.
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What it shows

  • Provides unity voltage gain (Av = 1) with near-infinite input impedance.
  • Prevents voltage drop caused by downstream load resistance.
  • Extremely low output impedance allows it to drive heavy loads or ADC sampling caps.

The takeaway

A voltage follower transfers signal voltage with unity gain while preventing source loading via high input impedance.

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