Timeline for Controlling gain and modulation depth of long-tail pair as AM modulator?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 27, 2021 at 14:40 | vote | accept | Toby Eggitt | ||
| Dec 26, 2021 at 10:23 | comment | added | Andy aka | A couple of diodes and a tuned circuit can give pretty good results as a linear AM modulator. Here's one using a single diode. | |
| Dec 26, 2021 at 9:00 | history | tweeted | twitter.com/StackElectronix/status/1475028617956573187 | ||
| Dec 26, 2021 at 6:10 | history | became hot network question | |||
| Dec 26, 2021 at 1:36 | comment | added | Kevin White | With an unbalanced modulator such as this you need to separate the carrier RF from the modulation signal at the output. That can be done with a selective filter (tuned circuit) or using a balanced modulator. | |
| Dec 25, 2021 at 23:55 | answer | added | glen_geek | timeline score: 4 | |
| Dec 25, 2021 at 23:45 | comment | added | user16324 | Well for the specific question, I think you can easily work out the audio peak voltage that will pull Q3 to zero current. | |
| Dec 25, 2021 at 22:57 | comment | added | Toby Eggitt | Well, I could... Though I was really hoping to keep this whole thing simpler, rather than harder. If this one isn't practical, I think I'll be trying a dual-gate MOSFET approach next. | |
| Dec 25, 2021 at 22:34 | comment | added | user16324 | You could go just a little bit further and look at the Gilbert cell, as seen in the MC1495/1496, and see how they do it. | |
| Dec 25, 2021 at 22:09 | history | asked | Toby Eggitt | CC BY-SA 4.0 |