25 MHz current to frequency convertor utilising a new type of comparator

A new type of comparator, consisting of a tunnel diode and a dual gate m.o.s.f.e.t., allowed the construction of a simple, 25 MHz current to frequency convertor (I/fc). The letter describes the principle of operation of the I/fc and the differences to I/fcs using customary comparators. The result of a computer simulation about some interesting aspects of I/fc linearity is also presented.