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EDNLíon na míonna: 6

1 A, 20V PWM DAC current source with tracking preregulator

This design idea reprises another “ 1A, 20V, PWM controlled current source.” Like the earlier circuit, this design integrates an LM3x7 adjustable regulator with a PWM DAC to make a programmable 20 V, ...
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Simple diff-amp extension creates a square-law characteristic

A simple extension of a previous class A/B differential output amp DI that creates a square-law characteristic.