Why High-Impedance Sensors Need Voltage Followers – LTspice Simulation

In this video, we demonstrate why high-impedance sensors often require voltage followers (buffer amplifiers) when interfacing with measurement and processing circuits. Using LTspice, we compare a high-impedance sensor connected directly to a load resistor with the same sensor interfaced through a voltage follower. The simulation illustrates how loading effects can significantly reduce the measured sensor voltage and how a voltage follower preserves the sensor signal while supplying the required load current. Topics covered: High-impedance sensor modeling Voltage divider loading effects Voltage follower operation Input and output impedance Sensor signal conditioning LTspice circuit simulation #Electronics #Sensors #LTspice #VoltageFollower #OpAmp #AnalogElectronics #EngineeringEducation