This circuit, which can be used as a shield, was found in American documentation from the 1970s. This configuration appears elsewhere in this section from other sources.
This small audio amplifier circuit in complementary symmetry was found in the 1974 Mullard...
This circuit, suggested by Siemens, allows the activation of 24 V solenoids from TTL LSL signals,...
This VCO with a common operational amplifier was found in an old American documentation. The...