5-Range Voltmeter with AC to DC Converter (CB25224E)

This digital instrument input circuit was found in the September 1989 issue of Radio Electronics magazine. The circuit has a high input resistance.

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White Noise Generator (CB17603E)
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This direct detection circuit was found in a 1986 documentation. The output is of low power, but...
Zero Crossing Detector LM3900 (CB15261E)
Other amplifiers of the series like the MC3301, MC3401 and LM2900 can be used in this circuit. We found...