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RX-MODEL
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Rhonexum introduces the RX-Model — a SPICE-compatible compact model built specifically for cryogenic circuit simulation.
While traditional models struggle at ultra-low temperatures, relying on bloated room-temperature frameworks with hundreds of parameters, the RX-Model sets a new standard: fast, stable, and cryo-native.
While traditional models struggle at ultra-low temperatures, relying on bloated room-temperature frameworks with hundreds of parameters, the RX-Model sets a new standard: fast, stable, and cryo-native.
● A tiny chip like this can have massive costs and delay. in ourdays, a fabrication cycle can take up to $25k per mm2 in 8 months.
Conventional circuit design processes rely on multiple physical iterations before reaching a functional prototype.
Each design adjustment requires new manufacturing runs and testing cycles, extending timelines and significantly increasing costs. Without accurate simulation, teams work in the dark — refining through trial and error rather than predictive insight. This iterative loop delays innovation and reduces efficiency across the entire development pipeline.
Each design adjustment requires new manufacturing runs and testing cycles, extending timelines and significantly increasing costs. Without accurate simulation, teams work in the dark — refining through trial and error rather than predictive insight. This iterative loop delays innovation and reduces efficiency across the entire development pipeline.
0%
of the designs fail on the first try.
That’s where we start.
That’s where we start.
fewer chips.
less cash.
faster results.
Existing Solutions
10 manufacturing runs
1 manufacturing run
80 months
8 months
$2M
$200K
90% Time & Cost reduction
Existing Solutions
10 manufacturing runs
80 months
$2M
1 manufacturing run
8 months
$200K
90% Time & Cost reduction
Engineered with a physics-based, semi-empirical approach and advanced normalization techniques, RX-Model delivers robust, numerically stable simulations across cryogenic regimes. It’s technology-agnostic, working seamlessly with various CMOS processes.
Unlike conventional tools, RX-Model captures key cryogenic effects — like quantum transport — without convergence issues. It uses significantly fewer parameters, is deployable in days, and plugs effortlessly into both commercial and open-source platforms.
Unlike conventional tools, RX-Model captures key cryogenic effects — like quantum transport — without convergence issues. It uses significantly fewer parameters, is deployable in days, and plugs effortlessly into both commercial and open-source platforms.
Simulation at -270ºC Accuracy Benchmark
(X) gate voltage (AU)
(Y) DRAIN CURRENT LOG SCALE (AU)
(X) gate voltage (AU)
(Y) DRAIN CURRENT LOG SCALE (AU)
0.0%
Simulation Accuracy at -270ºC
0.0%
Simulation Accuracy at -270ºC
currently adapted for
Our experience with these technologies has been instrumental in the development of the libraries.
GF
22 nm FDSOI
ST
28 nm FDSOI
TSMC
28 nm Bulk
[ RX-MODEL ]
[ MANUFACTURING PROCESS ]
[ CHIP DESIGN ]
[ RX-MODEL ]
[ MANUFACTURING PROCESS ]
[ CHIP DESIGN ]
Embrace Cryogenic Environments.
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