Dynamic hysteresis of the RTD folding circuit and its limitation on the A/D converter

Dynamic hysteresis of the resonant tunneling diode (RTD) folding circuit is analyzed. From the study of the dynamic hysteresis effect, the limiting factors for folding-type analog-to-digital (A/D) converters are investigated. A 4-bit A/D converter using 4-peak RTDs is simulated. By designing the RTD folding circuit carefully, the simulations show that a 4-b A/D converter could have a 2-GHz signal bandwidth.<
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