Tunnel devices as switching elements

The paper discusses the various ways in which the ¿gain¿ of a tunnel diode may be described and a straight line approximation to the tunnel diode´s characteristic is used in obtaining an estimate of the switching time. An arrangement using ten diodes in series is suitable for decimal counting and circuits for a simple multiplier are given. Synchronous and asynchronous logic is compared and binary counting circuits are described. Two designs for a two-phase shift register are given. Mention is made of the part that backward diodes can play in tunnel diode circuits.