Can someone explain how this transistor comparator works? 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
What is the difference between a general comparator and a differential . . . 6 I notice that the LM339 quad comparator comes in 2 different varietys: general-purpose and differential Besides a big difference in price, what is the difference between the two? Specifically, I want to use it in a slow-changing (as in whole minutes before crossings) single-supply (12v) circuit that needs to output very close to 0 for Vsat-
comparator - Common-mode voltage outside the specified range . . . Most comparators (including the TL331) require that only one of the inputs be within the common-mode range for correct operation The data sheet schematic reveals the reason for this Because the input differential amplifier uses PNP transistors, the transistor input with the higher voltage will be off; it doesn't matter if it exceeds the common-mode voltage range As long as the input with
comparator - Very high precision zero crossing detection - Electrical . . . Is there a good resource on high precision zero crossing? The output voltage from the coil is low (~3mV pp), so should I choose a comparator with lower input voltage offset? Or would it make more sense to add a preamp stage? How about propagation delay - if a comparator has delay of x for one transition, will it be x for every transition?