High-Frequency Transister Modeling for Circuit Design.
Abstract
It has been found that hybrid-pi or high-frequency T are inadequate high-frequency models for certain transistor types even though the models are supplemented by reasonable extrinsic elements. The hybrid-pi can be modified to model these transistors by replacing the (r sub pi)(C sub pi) circuit by an RC ladder. Using a computer optimization program an optimal, N-lump model is generated. For the 2N918 transistor a two-lump model extends the frequency range of the hybrid-pi model to (f sub T)/2. Typical circuit examples show most of the improvement in model performance can be obtained with a two-lump model.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1971
- Accession Number
- ADA006640
Entities
People
- A. B. Macnee
- R. J. Talsky
Organizations
- University of Michigan