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White-LED driver operates down to 1.2V supply voltage
This circuit beats commercially available LED drivers, which bottom out at 2.5V input voltage, by operating at voltages as low as 1V. Details... more...
Soft-limiter circuit forms basis of simple AM modulator
Inserting diodes biased by reference voltages in the feedback loop of an op amp yields a soft limiter that you can use as the basis of an AM modulator. Details... more...
Nonvolatile digital potentiometer gates logic signal
A novel use for digital potentiometers employs them as a logic gate that functions as soon as the system powers up. Details... more...