Which method measures the highest voltage in a circuit?

Which method measures the highest voltage in a circuit?

• A. Direct measurement
• B. Reference measurement
• C. Analog measurement
• D. Peak detection

Answer: (D)

To see the highest voltage a signal reaches, you need a method that captures the maximum instantaneous value. A peak detector does this by using a diode to charge a capacitor up to the peak voltage and then hold that value, giving you the true peak amplitude (Vpeak) of the waveform. Direct measurement only shows the voltage at the exact moment you read it, which may not be the peak, and a general analog readout tracks the signal without guaranteeing the top value. RMS or average readings describe different quantities and won’t equal the maximum voltage of the waveform. For fast transients, a peak detector reliably reveals the highest voltage, whereas the other methods don’t guarantee capturing that peak.

To see the highest voltage a signal reaches, you need a method that captures the maximum instantaneous value. A peak detector does this by using a diode to charge a capacitor up to the peak voltage and then hold that value, giving you the true peak amplitude (Vpeak) of the waveform. Direct measurement only shows the voltage at the exact moment you read it, which may not be the peak, and a general analog readout tracks the signal without guaranteeing the top value. RMS or average readings describe different quantities and won’t equal the maximum voltage of the waveform. For fast transients, a peak detector reliably reveals the highest voltage, whereas the other methods don’t guarantee capturing that peak.