Timeline for Shielding Amplification Stages Separately
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 28, 2017 at 4:29 | vote | accept | Çağlar Kutlu | ||
| Apr 26, 2017 at 13:02 | comment | added | Çağlar Kutlu | I'm sorry, I should have mentioned that my usage of "pulse" here is a smooth function over time that has a well defined peak in a well defined time period, which is 1 ns, not a square pulse. The signal is of an analog nature and a little bit stretched out version of the derivative of a gaussian with a sigma of 1 ns. | |
| Apr 26, 2017 at 12:11 | comment | added | Dan Mills | A 1ns pulse cannot have a spectrum that only extends to 340MHz, the math does not work. If the pulses are 1ns then you actually need gain out to well over 1GHz, or they will be low pass filtered out by your amplifiers, really for a pulse you would want at least 5GHz of reasonably flat gain (And that only gets you fundamental plus a few harmonics, there will be pulse smearing and maybe some ringing). | |
| Apr 26, 2017 at 6:57 | comment | added | Çağlar Kutlu | These are bipolar pulses of approximately 1 ns width. The frequency spectrum of the pulse covers a range of 1 - 340 MHz approximately. I am filtering in between 20-240 MHz with 3rd order butterworth filters. But I see your point, and actually we are completely amplifying thermal noise in that frequency region so we have every frequency enough for oscillation unfortunately. | |
| Apr 26, 2017 at 6:37 | answer | added | analogsystemsrf | timeline score: 0 | |
| Apr 26, 2017 at 6:06 | comment | added | analogsystemsrf | Are these pulses? or tone bursts? sinusoids will be more vulnerable to resonances in the gnd/vdd/signal chain | |
| Apr 26, 2017 at 0:06 | history | tweeted | twitter.com/StackElectronix/status/857023066974683136 | ||
| Apr 25, 2017 at 22:16 | answer | added | andrea | timeline score: 2 | |
| Apr 25, 2017 at 21:37 | answer | added | Voltage Spike♦ | timeline score: 1 | |
| Apr 25, 2017 at 16:59 | history | asked | Çağlar Kutlu | CC BY-SA 3.0 |