Multisim producing very low comparator output voltage

In the images below I have the same schematic in multisim, one snapshot for each state of the comparator. I've got the VCC pin connected to 12VDC and the ground and VEE pins to ground. There is a distinct difference between the two states, but 15.8 mV for a "high" doesn't seem right. Shouldn't it be VCC? What am I missing?

Note: I just realized that one of the voltage labels is over the pin, that's pin 8 that's covered.

Multisim producing very low comparator output voltage


The LM311 has an open-collector output; when the output is high it's actually high-impedance. If you want a high voltage then you'll need to use a pullup on the output.

Category: comparator Time: 2014-05-29 Views: 7

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