Die stacking has proven effective in MEMs and FPGA solutions but has yet to impact mainstream computing CPUs and GPUs. This talk will walk through how die stacking will enter mainstream computing and how it will change the industry in the future
Operating 100kV downhole neutron tube power supplies at temperatures above 150 °C yield low operating efficiency due to excessive diode leakage in the series Cockroft - Walton multipliers typically used. Such circuits are usually limited to less than twelve stages due to N3 voltage regulation effects resulting in immoderate potentials across the switching rectifiers. This paper discusses the merits of using parallel multipliers with 30 stages or more to achieve higher conversion efficiencies at elevated temperatures in tools with 1.3 inch (32mm) diameters. By minimizing the per-stage voltage, definite improvements are realized due to reductions in reverse current leakage per device. Efficiencies of up to 50% may be achieved at 175 °C operating temperature by this technique. In addition, ripple voltages present on the output are not a function of the number of multiplying stages in parallel designs.
Commercialization of a Pulsed, Sealed Neutron Tube