Timeline for Transistor differential wein bridge oscillator wrong frequency
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| Jun 14, 2019 at 7:57 | comment | added | LvW | I know that R9 and R7 provide negative feedback (that`s what I wrote). But my question was "for which purpose"?? An oscillator needs one well-designed positive feedback loop only. This negative feedback lopp drastically reduces the input resistance of Q1 - and has a strong influence on the oscillation frequency. | |
| Jun 14, 2019 at 5:44 | vote | accept | Xolani Masemula | ||
| Jun 13, 2019 at 16:46 | comment | added | Xolani Masemula | R2, R5, R6 and R10 are used for DC bias as i'm using a single supply, and C2 and C1 are for coupling feedback so that feedback resistance does'nt interfere with my DCbias, R9 and R7 form the actual negative feedback, | |
| Jun 13, 2019 at 14:33 | comment | added | LvW | What is the purpose of R9 and R7 and C2 ?? This is an aditional negative signal feedback. | |
| Jun 13, 2019 at 13:59 | answer | added | analogsystemsrf | timeline score: 0 | |
| Jun 13, 2019 at 11:02 | history | edited | Xolani Masemula | CC BY-SA 4.0 |
added 5 characters in body
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| Jun 13, 2019 at 8:48 | comment | added | Xolani Masemula | Hi Chu, yes I'm quite sure their connected, If either parts were disconnected I don't think I would get any oscillation at all...the circuit does oscillate, but does it at the wrong frequency. | |
| Jun 13, 2019 at 7:53 | comment | added | Chu | Are you sure that everything is connected at the C1/C3/C4/R12 junction? In general, it's better to offset the connections at a crossroads in multisim. | |
| Jun 13, 2019 at 5:11 | history | edited | Solar Mike | CC BY-SA 4.0 |
edited title
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| Jun 13, 2019 at 4:35 | comment | added | jsotola | edit your question above ... do not put information into comments | |
| Jun 13, 2019 at 4:35 | review | First posts | |||
| Jun 13, 2019 at 6:48 | |||||
| Jun 13, 2019 at 4:34 | comment | added | Xolani Masemula | I meant the frequency should be 381Hz | |
| Jun 13, 2019 at 4:32 | history | asked | Xolani Masemula | CC BY-SA 4.0 |