Timeline for Ripple rejection of capacitance multiplier when compared to linear regulators
Current License: CC BY-SA 4.0
17 events
| when toggle format | what | by | license | comment | |
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| Dec 5, 2023 at 0:06 | vote | accept | EJE | ||
| Jan 30, 2023 at 6:05 | answer | added | Designalog | timeline score: 1 | |
| Jan 28, 2023 at 22:36 | history | became hot network question | |||
| Jan 28, 2023 at 18:00 | history | tweeted | twitter.com/StackElectronix/status/1619394901778604032 | ||
| Jan 28, 2023 at 17:38 | answer | added | Math Keeps Me Busy | timeline score: 2 | |
| Jan 28, 2023 at 17:14 | history | edited | JRE | CC BY-SA 4.0 |
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| Jan 28, 2023 at 17:06 | comment | added | EJE | @Andyaka, who did such comparisons was not me, but Dave (administrator of EEVBlog) that is hugely more knowledgeable than me in electronics. I cannot disagree with you, but Dave has presented good points to think, as FesZ too (updated links). About the MCP1700 and CapMult comparison, if they are ‘weak’, I’m just the ‘messenger’, ok? About asking for other Voltage Regulators, ok, I’m the author of this doubts and I’m not an Electronic Engineer, just a retired Mech.Eng. with PhD in other area than EE, who is passionate about electronics. And for these doubts, I’m guilty ;-) | |
| Jan 28, 2023 at 17:06 | history | edited | ocrdu | CC BY-SA 4.0 |
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| Jan 28, 2023 at 17:00 | history | edited | ocrdu | CC BY-SA 4.0 |
added 7 characters in body
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| Jan 28, 2023 at 16:55 | history | edited | EJE | CC BY-SA 4.0 |
Provided clarifications and updates motivated by ‘Tobalts’ and ‘Andy aka’ comments. Included FesZ Electronics links for further consultation (of readers) about improvements in CapMult circuit and how SMPS noise appears as a HF ripple noise - a possible source of noise to be (tentatively) removed.
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| Jan 28, 2023 at 16:46 | history | edited | winny | CC BY-SA 4.0 |
Kelvinhertz -> kilohertz
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| Jan 28, 2023 at 16:37 | answer | added | glen_geek | timeline score: 5 | |
| Jan 28, 2023 at 15:59 | comment | added | EJE | @tobalt, good points. I will update the Question to avoid this confusion. I’m Brazilian, so a sense of humor is always welcome (for us) to lighten things. I didn’t named it ‘Capacitance Multiplier’ as a known term and don’t know who gave such name. I agree (and Iike) your ‘Ripple Eater’ or ‘Ripple Smoother’ as making more sense to me, especially because it does not really multiply the capacitance, but works just as buffered current amplifier, as you mentioned. Other misnomers in as ‘Joule Thief’ are popular, but if you look for ‘blocking oscillator’, it has lesser popularity. | |
| Jan 28, 2023 at 9:46 | comment | added | Andy aka | In (1) why are you comparing the basic emitter follower (quiescent current in the several mA region and a drop-out voltage around 1 volt) with the MCP1700 (really low quiescent current of 1.6 uA and low drop-out voltage below 200 mV). The tech in the MCP1700 is massively different and fulfils a different market area entirely. The comparison is loaded and weak. | |
| Jan 28, 2023 at 6:51 | comment | added | tobalt | Btw, CM in context of filtering and noise is usually interpreted as common-mode. So you could consider another abbreviation, or another name. This circuit doesn't multiply capacitance. It is a buffered lowpass, nothing more, nothing less, so maybe BLP ;) In notes/discussions I call it "ripple eater", somewhat in line with your bullet (4.) | |
| Jan 28, 2023 at 5:32 | comment | added | tobalt | It's a buffered lowpass, so its PSRR is about as good as that of the lowpass..But its output impedance is rather bad compared to actual linear regulators with feedback. | |
| Jan 28, 2023 at 3:57 | history | asked | EJE | CC BY-SA 4.0 |