The Cause and Eliminate Method of Self-excited Oscillation in Long Cable Amplifier Circuits
SMA long cable distributed capacitance is easy to trigger broadband amplifier circuit’s self-oscillation. In this study we design an amplifier circuit based on OPA691 chip, discuss the influence of long cable’s distributed capacitance, then prompt a solution to add 50Ω compensation resistor between...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2018-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://doi.org/10.1051/matecconf/201817302032 |
| _version_ | 1818849141674999808 |
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| author | Wang Can Huang Ming Peng Zhaomin Cui Jinbao |
| author_facet | Wang Can Huang Ming Peng Zhaomin Cui Jinbao |
| author_sort | Wang Can |
| collection | DOAJ |
| description | SMA long cable distributed capacitance is easy to trigger broadband amplifier circuit’s self-oscillation. In this study we design an amplifier circuit based on OPA691 chip, discuss the influence of long cable’s distributed capacitance, then prompt a solution to add 50Ω compensation resistor between the output terminal and the load capacitance. According to the Tina simulation analysis, when 50Ω compensation resistor is added, bode diagrams show amplitude characteristic is smaller than 0 dB at -180 ° phase. The selfoscillation also disappeared in actual circuit measurement, which verify the rationality of this solution. |
| first_indexed | 2024-12-19T06:28:31Z |
| format | Article |
| id | doaj.art-f9d11f435b5e43468586247c7758e44d |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-19T06:28:31Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-f9d11f435b5e43468586247c7758e44d2022-12-21T20:32:28ZengEDP SciencesMATEC Web of Conferences2261-236X2018-01-011730203210.1051/matecconf/201817302032matecconf_smima2018_02032The Cause and Eliminate Method of Self-excited Oscillation in Long Cable Amplifier CircuitsWang CanHuang MingPeng ZhaominCui JinbaoSMA long cable distributed capacitance is easy to trigger broadband amplifier circuit’s self-oscillation. In this study we design an amplifier circuit based on OPA691 chip, discuss the influence of long cable’s distributed capacitance, then prompt a solution to add 50Ω compensation resistor between the output terminal and the load capacitance. According to the Tina simulation analysis, when 50Ω compensation resistor is added, bode diagrams show amplitude characteristic is smaller than 0 dB at -180 ° phase. The selfoscillation also disappeared in actual circuit measurement, which verify the rationality of this solution.https://doi.org/10.1051/matecconf/201817302032 |
| spellingShingle | Wang Can Huang Ming Peng Zhaomin Cui Jinbao The Cause and Eliminate Method of Self-excited Oscillation in Long Cable Amplifier Circuits MATEC Web of Conferences |
| title | The Cause and Eliminate Method of Self-excited Oscillation in Long Cable Amplifier Circuits |
| title_full | The Cause and Eliminate Method of Self-excited Oscillation in Long Cable Amplifier Circuits |
| title_fullStr | The Cause and Eliminate Method of Self-excited Oscillation in Long Cable Amplifier Circuits |
| title_full_unstemmed | The Cause and Eliminate Method of Self-excited Oscillation in Long Cable Amplifier Circuits |
| title_short | The Cause and Eliminate Method of Self-excited Oscillation in Long Cable Amplifier Circuits |
| title_sort | cause and eliminate method of self excited oscillation in long cable amplifier circuits |
| url | https://doi.org/10.1051/matecconf/201817302032 |
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