2022 Solution 07

Isaac P Abraham

2022 June 23

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An op amp taps into a resistor ladder at y and z. What is the ladder resistance as seen by the power supply? The ideal single supply op amp works from 1.3 V. Sample answer(s): 1 kΩ, 11 kΩ, 8.0 kΩ or something like that.

■ Reply no later than a couple of days before the end of the month to isaac.abraham@intel.com, Subject “Analog Beat 2022 Problem #”. Last reply of multiple replies will be considered. Earlier replies help with tie-breaks at the end.

The comparator presents 0 V at net-z. The load resistance seen by the power supply is 11000 Ω.