As shown in the figure, U2’s chip manual says operational amplifier
This is the meaning of amplifier, right
But after adding positive feedback, it becomes a hysteresis comparator
Does the amplifier become a comparator like this?
Isaac Posted on March 11, 2021
Don't be entangled with these superficial concepts. Comparators should be defined in terms of function, and are essentially amplifiers.
Lucas Posted on March 11, 2021
Comparators and op amps can be regarded as one kind of things, but there are more limits. If the op amp is connected to a comparator, that is not a problem.
Jackson Posted on March 11, 2021
In principle, the principle is similar. Compensation is omitted inside the comparator. Circuits such as analog bias are the comparators. The comparator requires speed, and the operational amplifier requires stability. The two can be interchanged if the requirements are not high. Generally, the comparator is OC output.