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An electronic component that sources current - if it sinks current it is called a current sink but both devices (sinks and sources) can be called sources. An IDEAL current source will supply current , maintain high voltage compliance (i.e. adapt it's output voltage to match the network it is supplying current to) and have an infinite output impedance. In non-ideal implementations current sources have limited operating ranges and finite output impedances.

3
votes
Thanks to everyone who commented. Based on the responses, I have two solutions for blanking the LM3914. I think the first method gets close to making sense of the datasheet in my original question. Th …
answered Mar 23 by higrafey
2
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2answers
I'm designing a circuit with an LM3914 dot/bar display driver and want to shut off the entire bank of LEDs based on conditions in the circuit. I'm having some difficulty turning off the driver from th …
asked Mar 22 by higrafey