A comparator is used to compare two voltages and produce a digital output signal based on the comparison result. Filters, on the other hand, are designed to allow certain frequencies to pass while attenuating others. During testing, for comparators, parameters such as hysteresis and response time are measured. For filters, characteristics like cutoff frequency, roll-off rate, and attenuation in the stopband are evaluated.
Fig. 7. Transient output waveform of the comparator.
Fig. 8. Amplitude-Frequency and Phase-Frequency Response Characteristics
of the Comparator. The blue curve represents the magnitude-frequency response,
while the red curve represents the phase-frequency response.
Comparators are widely used in applications such as analogto-
digital converters (ADCs), peak detection circuits, and overcurrent
detection circuits [21]. Comparators can be broadly
classified into two types: current comparators and voltage