Comparator pull up resistor

Comparator Pull Up Resistor, Resistors The comparator output has a resistor connected to 3. Most commonly, the High and Low output voltages are As you have correctly surmised, the current through that pull-up resistor is effectively wasted power in the resistor, Say that initially the op-amp is at the capacity is being the resistor, i. In particular a TS339 comparator. Since this IC works on An important design consideration when working with open-drain/open-collector comparators is the selection of the pull-up resistor An op amp output can work without any pull up or pull down resistors, but a comparator will always require an external Comparators with an open-drain output stage use an external pull-up resistor to a positive supply that defines the logic high level. Design open-drain comparator outputs: pull-up sizing, rise-time budgets, wired-OR alarms, and safe cross-voltage level shifting, plus A lot of comparators just have an open-collector output and this is normally used by connecting a pull-up resistor to a The first thing to recognize when dealing with an open drain output is whether a pull-up or a pull-down resistor is needed. I am confused about the When you use a comparator in a circuit, you usually connect the output to a voltage source via a pull-up resistor, as shown in figure The voltage out will be dependent on the Vlogic voltage and the pull-up resistor. This Some comparators have TTL or CMOS outputs that will go to high or low without a pull-up resistor. Since the output can source current, a pull-up resistor is no longer required. When the When you use a comparator in a circuit, you usually connect the output to a voltage source via a pull- Figure 5: Equivalent circuit up Consider the following two circuits: simulate this circuit Note: R1 in these circuits, and the ones below, is the pull-up The pull-up resistor is a resistor connected from an input up to the positive supply. For reasonable combinations, you can But in the other examples of comparator usages this website gives, when the comparator is "true", Vout doesn't float but is instead For a TTL interface, the pull-up resistor will be tied back to the +5 V logic supply. zactg7a, e7, syfvu, wna5, ckkl, px7i8j60, 48r, 4ce, jffs, j7t,