Name
Title | ||
|---|---|---|
Accurate Distortion Prediction For Thermal Memory Effect In Power Amplifier Using Multi-Stage Thermal Rc-Ladder Network |
Abstract | ||
|---|---|---|
Distortion characteristics caused by the thermal memory effect in power amplifiers were accurately predicted using a multi-stage thermal RC-ladder network derived by simplifying the heat diffusion equation. Assuming a steep gradient of heat diffusion near an intrinsic transistor region in a semiconductor substrate, the steady state temperature, as well as the transient thermal response at the transistor region, was estimated. The thermal resistances and thermal capacitances were adjusted to fit a temperature distribution characteristic and a step response characteristic of temperature in the substrate. These thermal characteristics were calculated by thermal FDTD simulation. For an InGaP/GaAs HBT, a step response characteristic for a square-wave voltage signal input was simulated using a large-signal model of the HBT connecting the multi-stage thermal RC-ladder network. The result was verified experimentally. Additionally, for an RF-amplifier using the HBT, the 3rd-order intermodulation distortion caused by the thermal memory effect was simulated and this result was also verified experimentally. From these verifications, a multi-stage thermal RC-ladder network can be used to accurately design super linear microwave power amplifiers and linearizers. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1093/ietele/e90-c.9.1658 | IEICE TRANSACTIONS ON ELECTRONICS |
Keywords | Field | DocType |
thermal memory effect, thermal resistance, thermal capacitance, thermal RC-ladder network, IMD3 | Transient response,Thermal mass,Electronic engineering,Heat equation,Intermodulation,Engineering,Transistor,Distortion,Amplifier,Thermal resistance | Journal |
Volume | Issue | ISSN |
E90C | 9 | 1745-1353 |
Citations | PageRank | References |
3 | 0.90 | 0 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yukio Takahashi | 1 | 3 | 0.90 |
| Ryo Ishikawa | 2 | 8 | 7.74 |
| Kazuhiko Honjo | 3 | 12 | 11.55 |