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| Step 1 - Circuit Preparation |
Input
- Circuit Schematic
- Device Models
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- Schematic Preparation - Device Parameters
- Testbench Setup
- Configuration of Simulation Environment
- Setup Model Libraries and Simulation Files
- Analyses Setup (DC, AC, Tran, XF, PSS, PNoise,...)
- Setup of Design Variables
- Setup of Output Expressions
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Output
- Parameterized Schematic
- Model Preparation
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Based on the chosen circuit schematic the first step of the WiCkeDTM sizing and design centering flow is the preparation of the circuit and testbenches in order to be simulated, analysed and optimized. The characteristic of a circuit on transistor level depends on its topology, design parameters, process variation during production and operating conditions at the time of measurement. The designer is only able to change the design parameters, where the distribution of the process parameters and the specified range of the operating parameters are given. The designers goal is, to find design parameter values that make as many produced circuits as possible fulfill their specifications in the full operating range. WiCkeDTM provides the designer with methods for analysing and optimizing her/his circuit design. For this reason it is necessary to parameterize the schematic to be able to change design parameter values in order to optimize the circuit to meet specifications and reach the best performance and yield. In Step 1 Circuit Preparation the schematic is parameterized. All device geometry parameters intended to be optimized by WiCkeDTM are defined as design variables in the schematic cellview of the design framework environment using the initial values (if available) for optimization.
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