Resonant tunneling diodes and their application to high-speed circuits

Resonant tunneling diodes (RTDs) are attracting much attention because of their potential for high-speed operation as well as for high functionality due to the negative differential resistance (NDR). This paper discusses the applications of RTDs to ultrahigh-speed circuits. First, we described a resonant tunneling logic gate, MOBILE, which has unique features for various applications. A chaos generator circuit using RTDs and their applications are also discussed based on our recent results.