This circuit was found in ancient American documentation. It makes use of the operational amplifiers of the time, but it can be implemented with modern equivalents.
This shield circuit uses a common CMOS port. The voltage depends on the interfaced logic. The...
This logarithmic gain operating configuration was found in the June 1994 Electronics Now magazine. The...
This circuit was found in the Spanish magazine No longer in existence, Mundo Electrónico, in a...