An RBT is a micro-electromechanical (MEM) resonator with a transistor (FET) incorporated into the resonator structure to sense the mechanical vibrations. This is a fully-featured spice-compatible compact model for fast analysis of RBTs.
Listed in Compact Models | publication by group NEEDS: Nano-Engineered Electronic Device Simulation Node
An RBT is a micro-electromechanical (MEM) resonator with a transistor (FET) incorporated into the resonator structure to sense the mechanical vibrations.
The electrostatic drive of RBTs using internal dielectric transduction, along with the FET sensing, enable these devices to easily scale to multi-GHz frequencies.
Together with the potential for monolithic CMOS integration, they represent a potential candidate for uncountable timing and RF applications that continuously drive the technology towards miniaturization, and aggressive reduction of power consumption.
This compact model is developed with the aim to capture the diverse and highly coupled physics intrinsic to the original RBT.
The model is aimed at presenting a deep insight into the physics of the RBT while emphasizing the effect of the different parameters on the device performance.
It is also intended to grant circuit designers and system architects the ability to quickly assess the performance of prospective RBTs, while minimizing the need for computationally intensive coupled-multiphysics finite element method (FEM) simulations.
The model relies on on a modified version of the MIT Virtual Source (MVS) model to implement both the electrostatic driving (as a MOSCAP) and the piezoresistive FET sensing.
Model Release Components ( Show bundle contents ) Bundle
- Released Resonant Body Transistor with MIT Virtual Source (RBT-MVS) Model 1.0.0 Verilog-A(ZIP | 43 KB)
- Released Resonant Body Transistor with MIT Virtual Source (RBT-MVS) Model 1.0.0 Benchmarks(ZIP | 5 MB)
- Released Resonant Body Transistor with MIT Virtual Source (RBT-MVS) Model 1.0.0 Parameters(TXT | 4 KB)
- Released Resonant Body Transistor with MIT Virtual Source (RBT-MVS) Model 1.0.0 Manual(PDF | 3 MB)
- License terms
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Cite this work
Researchers should cite this work as follows:
- Bahr, B. W., Weinstein, D., Daniel, L. (2015). Released Resonant Body Transistor with MIT Virtual Source (RBT-MVS) Model. nanoHUB. doi:10.4231/D3VH5CK04
RBT-MVS version 1.0.0
- rbt.va: Top level module, the main model interface
- rbtConst.vams: Model constants
- rbtBody.va: Resonant body module
- rbtMVSSense.va: Modified MVS model to model the sensing FET
- rbtMVSDrive.va: Modified MVS model to model MOS Cap driving
- rbtCapTrans.va: Electrostatic transducer module [not used by default]
- rbtParasitics.va: Parasitics modeling module
- rbtThermal.va: Thermal model module
- strainnature.va: Definition for the strain Verilog-A nature
- memsquantities.scs: More reasonable tolerances for the MEMS quantities
The rbt.va file includes the definition for the model top module.
This module should be used in circuit netlists (using an "ahdl_include"
statement for Spectre) as it represent the complete model.
The file memsquantities.scs should also be included in spectre netlists.
Testing the model:
A sample netlist is provided in the directory ../testing along with a GNU make file.
To run the model, it is sufficient to have the user's $PATH environment variable properly
pointing to Cadence Spectre and issuing the command:
If Cadence Custom IC design tools is also included in the user's $PATH environment
variable, the following command can be used to view the simulation results:
This command starts Cadence Visualization tool.
An Ocean script (plot.ocn) is also provided for plotting relevant results. To use it,
in Cadence Visulation tool issue the command:
NEEDS: Nano-Engineered Electronic Device Simulation Node
This publication belongs to the NEEDS: Nano-Engineered Electronic Device Simulation Node group.