We found this balanced modulator circuit for DSB and possibly SSB transmissions in US 1980s telecommunications documentation. The diodes can be replaced with equivalents.
What this circuit does is change the logic level of a signal thus serving as a different logic...
Reversing the switching action, with the output going high when the input is low, can be done by...
This electronic voltmeter circuit was found in a documentation from the 50's. The sensitivity is...