100 MHz harmonic oscillator (CB9659E)

This Pierce oscillator was found in American documentation from the 1980s. Transistors support modern equivalents.

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Super regenerative VHF receiver (CB7516E)
This circuit was found in an American documentation from 1977. The circuit can be implemented with modern...
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In this circuit the output voltage depends on the light that falls on the LDR, increasing when the...
100 Hz Second Order High Pass Filter (CB25815E)
This filter with the 741 op amp was found in the February 1995 Electronics Now magazine. The power...