The circuit in the figure uses two operational amplifiers: an LM101A and an LM102. Diodes admit equivalents and resistors do not have to be accurate. The power supply must be symmetrical.
The ZN414 integrated circuit consists of a complete radio from the 1980s. This single receiver...
This filter is current driven and has the formulas given by the two diagram options. The circuit...
We found this circuit in a 1982 publication, but all the components used are still common in our...