This high impedance circuit was found in 1967 documentation by Ferranti. The original operational amplifier is from that time. The circuit can be implemented with modern equivalents.
This circuit is from an English publication from 1978. It generates random binary numbers when we...
This interesting circuit, from a digital documentation two years 1978 shows how to implement a...
More and more supercapacitors are being used as supplementary sources of energy in several...