This circuit has an accuracy of 1%. The components used must be precision as well. The input frequency range is 40 Hz to 10 kHz with the indicated components.
This 80's circuit has been winning. It is a 1 000 gain sample and hold circuit and an offset...
Frequency divisions up to 18,384 can be performed with the basic configuration of a 4020 as shown...
This circuit was found in a 1992 publication, using an operational amplifier not very common...