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.
To obtain triangular signals, we have the circuit in the figure that uses two amplifiers. One of...
This circuit was found in an old Electronic Design. It makes use of sidacs and operational not very...
This circuit was found in an American publication from 1969. Transistors are from the time and can be...