A 250-MHz, 32-bit quantum MOS correlator prototype

Simulation results of Quantum MOS circuits comprising resonant-tunneling diodes (RTDs) and MOSFETs indicate greater than twofold improvement in power-delay product over CMOS. However, the challenges of co-integrating RTDs and CMOS devices have not been completely overcome yet, leaving the testing of RTD-CMOS circuit ideas to be accomplished by either simulation, or by electrically connecting discrete RTDs to CMOS chips, or by grafting and bonding RTDs to CMOS chips via a complicated hybrid integration process. While research in RTD-CMOS co-integration is ongoing, we present a 250-MHz, 32-bit QMOS correlator prototype that uses only MOS devices to emulate RTDs