What Is Comparator Offset

The input offset voltage of a comparator is the input voltage at which its output changes from one logic level to the other. It may be caused by device mismatch or may be inherent to the design of a comparator.

What is offset in a circuit?

Offsets are undesirable DC levels appearing at the output of a circuit. … This difference, or unbalance, is amplified by the remaining stages and will eventually produce a DC voltage at the output. Because all op amps are slightly different, you never know what the exact output offset will be.

What is offset voltage compensation?

The compensation of offset voltage is usually made by the use of external discrete resisters, either by parallel or by series connection. … Compensation can also be made using a series scheme. A small resistor Rs = βRB is connected in series with resistor R1, as shown in Fig. 6.11(b).