How exactly does a comparator work? Comparators have many uses and its concept is not too hard to grasp. What I don't understand however is how exactly it compares two voltages. How does it know ...
The comparator's very low output impedance in the low state isolates R from the pull-up resistor (reference designators - !). When the output is high, the current path through the output stage is an open circuit.
The circuit is a comparator and can be remarkably useful more or less as shown. I have used a circuit essentially the same as that in production equipment to meet a requirement which was difficult to meet easily and cheaply by other means.
I drew the following circuit using LM358 opamp in order to understand the comparator behavior. I have few questions regarding the circuit below: How should I wire the unused opamp? Will this circuit
The LM311 device is a comparator with an uncommited transistor output. This means that the output pin needs a pull-up resistor so that it can create a voltage signal and also pin 1 (the emitter)needs to be connected to the lowest supply rail.
What is the purpose of pulling up the output of a comparator to VCC ...
If you examine 98% of circuits online that include hysteresis for a comparator, they always implement the hysteresis on the non-inverting input, like so: This is easy enough to calculate. However,...
The comparator inputs require less than microamperes of current, so you can increase those resistances significantly. When the comparator output changes state, the load is switched on or off, and this will definitely change the reference voltages somewhat.