16 V Power Supply with Pulse Generator (CB14708E)

We found this circuit in GE's 1977 transistors manual. Transistors admit equivalents according to the desired current at the output.

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LC Oscillator Using the 4069 (CIR093E)
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DC Amplifier with Drift Compensation (CB14068E)
of the National Semiconductor of 1994. The same technique can be used with other operators and the...