3 GHz resonant tunneling clocked comparator

Abstract

The combination of resonant tunneling diodes (RTDs) and heterostructure fieid-effect transistors (HFETs) provides a versatile technology for designing ultra-hgh-speed analog and digital circuits. Here we demonstrate an RTD-KFET comparator circuit that operates up to 3 GHz clock frequency. The RTD based comparator allows us to employ 75% fewer devices than all-transistor comparators. The circuit is measured to have a single-tone spurfree-dynamic range of at least 40 dB and a sensitivity of 5 mV at a 2 GHz clock.

Tunnelling-based SRAM

“…Resonant-tunnelling diodes are of interest for use in multistate and compact memory [19][20][21][22][23][24][25][26][27][28], multivalued and self-latching logic [6,19,[29][30][31][32][33][34][35][36][37][38][39][40], pulse generation [7,[41][42][43][44], analogue-to-digital conversion [45][46][47][48][49][50][51][52], shift registers [6,53,54], oscillator elements [55][56][57], frequency multiplication [58][59][60], low-noise amplification [61,62], neural networks [63], and fuzzy logic …”