Stabilisation of multi‐loop amplifiers using circuit‐based two‐port models stability analysis
Abstract This article applies a systematic approach based on the normalized determinant function (NDF) theory to analyse stability in multi‐loop circuits and to design the required stabilization network. Presenting several provisions, the return ratios are extracted by employing immittance or hybrid...
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| Format: | Article |
| Language: | English |
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Wiley
2021-09-01
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| Series: | IET Circuits, Devices and Systems |
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| Online Access: | https://doi.org/10.1049/cds2.12050 |
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| author | Abbas Pasdar Masoud Meghdadi Ali Medi |
| author_facet | Abbas Pasdar Masoud Meghdadi Ali Medi |
| author_sort | Abbas Pasdar |
| collection | DOAJ |
| description | Abstract This article applies a systematic approach based on the normalized determinant function (NDF) theory to analyse stability in multi‐loop circuits and to design the required stabilization network. Presenting several provisions, the return ratios are extracted by employing immittance or hybrid matrices (Z, Y, G or H) of active two ports. Using these matrices, instead of the S‐parameters, facilitates the selection of an appropriate stabilizer network. As a practical case, a non‐uniform distributed amplifier (NDA) is designed and inspected for potential instabilities. The presented procedure detects instability associated with one of the NDA circuit's loops, and an appropriate stabilization circuit is accordingly devised. In order to validate the procedure, the designed NDA is implemented in a 0.1‐μm GaAs pHEMT process. As predicted, the measurements show oscillations, once the on‐chip stabilization circuit is disabled. |
| format | Article |
| id | doaj-art-44f1952fe8614f4d9f4da476ddf49010 |
| institution | Kabale University |
| issn | 1751-858X 1751-8598 |
| language | English |
| publishDate | 2021-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Circuits, Devices and Systems |
| spelling | doaj-art-44f1952fe8614f4d9f4da476ddf490102025-02-03T01:29:42ZengWileyIET Circuits, Devices and Systems1751-858X1751-85982021-09-0115655355910.1049/cds2.12050Stabilisation of multi‐loop amplifiers using circuit‐based two‐port models stability analysisAbbas Pasdar0Masoud Meghdadi1Ali Medi2The Department of Electrical Engineering Sharif University of Technology Tehran IranThe Electrical Engineering Department Shahid Beheshti University Tehran IranThe Department of Electrical Engineering Sharif University of Technology Tehran IranAbstract This article applies a systematic approach based on the normalized determinant function (NDF) theory to analyse stability in multi‐loop circuits and to design the required stabilization network. Presenting several provisions, the return ratios are extracted by employing immittance or hybrid matrices (Z, Y, G or H) of active two ports. Using these matrices, instead of the S‐parameters, facilitates the selection of an appropriate stabilizer network. As a practical case, a non‐uniform distributed amplifier (NDA) is designed and inspected for potential instabilities. The presented procedure detects instability associated with one of the NDA circuit's loops, and an appropriate stabilization circuit is accordingly devised. In order to validate the procedure, the designed NDA is implemented in a 0.1‐μm GaAs pHEMT process. As predicted, the measurements show oscillations, once the on‐chip stabilization circuit is disabled.https://doi.org/10.1049/cds2.12050circuit stabilitydistributed amplifiersgallium arsenideHEMT integrated circuitsIII‐V semiconductorsintegrated circuit design |
| spellingShingle | Abbas Pasdar Masoud Meghdadi Ali Medi Stabilisation of multi‐loop amplifiers using circuit‐based two‐port models stability analysis IET Circuits, Devices and Systems circuit stability distributed amplifiers gallium arsenide HEMT integrated circuits III‐V semiconductors integrated circuit design |
| title | Stabilisation of multi‐loop amplifiers using circuit‐based two‐port models stability analysis |
| title_full | Stabilisation of multi‐loop amplifiers using circuit‐based two‐port models stability analysis |
| title_fullStr | Stabilisation of multi‐loop amplifiers using circuit‐based two‐port models stability analysis |
| title_full_unstemmed | Stabilisation of multi‐loop amplifiers using circuit‐based two‐port models stability analysis |
| title_short | Stabilisation of multi‐loop amplifiers using circuit‐based two‐port models stability analysis |
| title_sort | stabilisation of multi loop amplifiers using circuit based two port models stability analysis |
| topic | circuit stability distributed amplifiers gallium arsenide HEMT integrated circuits III‐V semiconductors integrated circuit design |
| url | https://doi.org/10.1049/cds2.12050 |
| work_keys_str_mv | AT abbaspasdar stabilisationofmultiloopamplifiersusingcircuitbasedtwoportmodelsstabilityanalysis AT masoudmeghdadi stabilisationofmultiloopamplifiersusingcircuitbasedtwoportmodelsstabilityanalysis AT alimedi stabilisationofmultiloopamplifiersusingcircuitbasedtwoportmodelsstabilityanalysis |