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Apple Hardware Engineer Interview Question

I interviewed in Cupertino, CA and was asked:
"Design an LED driver using an op-amp"
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Part of a Hardware Engineer Interview Review - one of 2,292 Apple Interview Reviews

Answers & Comments

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Use an opamp with the input connected to the non-inverting input and as a buffer. ie.unity gain. connect a resitor at the output to limit the current drawn by the LED.
- anonymus on Nov 20, 2013

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