We found this balanced modulator circuit for DSB and possibly SSB transmissions in US 1980s telecommunications documentation. The diodes can be replaced with equivalents.
We found this circuit in an article in Electronics Now magazine from March 1996. The frequency is limited...
This circuit is designed to measure very weak currents, in the nanoampères range, using the 1 V...
This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...