Frequency dividers by Schottky coupled I/sup 2/L gates

A frequency dividing cell composed of four I/SUP 2/L gates and two Schottky diodes is proposed and analyzed. The cells are connected by one I/O line. n-p-n transistors need only two collectors. Simulation of the circuit with I/SUP 2/L gates of 3.2 ns/gate predicts the operating frequency up to 80 MHz. The operating frequency of 33 MHz was observed using a circuit built by discrete I/SUP 2/L gates with minimum propagation delay of 7.5 ns/gate and Schottky diodes.