This sensor circuit for currents of the order of nanoamperes was found in an American documentation from the 1980s. The components are from that time.
This circuit for dual-gate MOSFET was found in a 90’s Popular Electronics. The coils are according...
August 2016 - Mouser Electronics is offering the DC / DC converters from Torex Semiconductor with...
This circuit uses a PLL4046 oscillator to excite a piezoelectric ceramic. The circuit is from an...