The paper presents an original CMOS implementation of current and voltage followers in 40 nm TSMC technology. Authors have designed these components as basic components for construction more complex ...analog and mixed-signal embedded systems based on current signals processing. The main parameters of these basic building blocks have been analyzed and discussed. Authors give fundamental mathematical equations that allow describing both followers and their applications. Modern electronic systems need to be flexible with ability of programming some of their parameters. Thus, the idea digital-analog front-end based on binary programming of circuits parameters is introduced. Results of simulation experiments carried out with the presented components are given. Finally, the investigations are summarized and some conclusions emphasizing the quality of the analyzed approach are presented.
MOSFET simulation using neuro-fuzzy network Izadian, M; Farokhi, F; Fallahzadeh, M R
2010 Second Pacific-Asia Conference on Circuits, Communications and System,
2010-Aug., Letnik:
1
Conference Proceeding
In this paper, we apply a neuro-fuzzy network for simulating MOSFETs. The training data was obtained by various simulations in PSPICE. Comparison between PSPICE simulation and the implemented method ...indicated that the neuro-fuzzy network is a suitable model to be incorporated in spice-like simulators for MOSFET simulations and it would be a good replacement for sub-circuits which their simulations using complicated mathematical models are too time consuming.
This paper proposes a SPICE model development methodology for quantum-dot cellular automata (QCA) cells and presents a SPICE model for QCA cells. The model is validated by simulating the basic logic ...gates such as inverter and majority voter. The proposed model makes it possible to design and simulate QCA combinational circuits and hybrid circuits of QCA and other NANO devices using SPICE. In the second half part of the paper, SET and QCA co-design methodology is proposed and SET is used as a readout interface of the QCA cell array. The SET and QCA hybrid circuit is a promising nano-scale solution.
The focus of this work is on the steady-state analysis of RE circuits using a
coupled device and circuit simulator. Efficient coupling algorithms for both the time-domain
shooting method and the ...frequency-domain harmonic balance method have
been developed. A modified Newton shooting method considerably improves the
efficiency and reliability of the time-domain analysis. Three different
implementation approaches of the harmonic balance method for coupled device and
circuit simulation are investigated and implemented. These include the quasi-static,
non-quasi-static, and modified-Volterra-series approaches. Comparisons of
simulation and performance results identify the strengths and weakness of these
approaches in terms of accuracy and efficiency.
Graduation date: 2005
In certain dynamical systems, the addition of noise can assist the detection of a signal and not degrade it as normally expected. This is possible via a phenomenon termed stochastic resonance (SR), ...where the response of a nonlinear system to a subthreshold periodic input signal is optimal for some non-zero value of noise intensity. We investigate the SR phenomenon in several circuits and systems. Although SR occurs in many disciplines, the sinusoidal signal by itself is not information bearing. To greatly enhance the practicality of SR, an (aperiodic) broadband signal is preferable. Hence, we employ aperiodic stochastic resonance (ASR) where noise can enhance the response of a nonlinear system to a weak aperiodic signal. We can characterize ASR by the use of cross-correlation-based measures. Using this measure, the ASR in a simple threshold system and in a FitzHugh–Nagumo neuronal model are compared using numerical simulations. Using both weak periodic and aperiodic signals, we show that the response of a nonlinear system is enhanced, regardless of the signal.
Algorithms and simulators comprised of SPICE3 as a circuit level simulator
and two device simulators EOFLOW and PROPHET for accurate simulation of
new types of devices are presented in this thesis.
...An integration of EOFLOW with SPICE3 creates a capability for efficient
simulation of a system containing interconnected electroosmotic flow channels
together with control electronics. Using this simulator, an accurate simulation of a
complex interconnection of channels has been performed. In addition, various flow
control schemes have been evaluated for their effectiveness.
Coupling of PROPHET and SPTCE3 allows for the simulation of accurate
semiconductor device models. This capability is necessary for critical RF and
analog applications. The coupled SPICE3-HB-PROPHET simulator incorporates
the harmonic balance algorithm for large-signal frequency domain analysis.
Applications of this analysis are demonstrated in the noise coupling between
devices sharing the same silicon substrate.
Graduation date: 2003
With the rapid progress made by industry and academia, quantum computers with dozens of qubits or even larger size are being realized. However, the fidelity of existing quantum computers often ...sharply decreases as the circuit depth increases. Thus, an ideal quantum circuit simulator on classical computers, especially on high-performance computers, is needed for benchmarking and validation. We design a large-scale simulator of universal random quantum circuits, often called "quantum supremacy circuits", and implement it on Sunway TaihuLight. The simulator can be used to accomplish the following two tasks: 1) Computing a complete output state-vector; 2) Calculating one or a few amplitudes. We target the simulation of 49-qubit circuits. For task 1), we successfully simulate such a circuit of depth 39, and for task 2) we reach the 55-depth level. To the best of our knowledge, both of the simulation results reach the largest depth for 49-qubit quantum supremacy circuits.
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