| ??? 05/29/07 16:14 Read: times |
#139982 - Electrodynamics instead of electrostatics... Responding to: ???'s previous message |
David said:
Ugh, I've got some very nasty responses I once designed a peak detector being able to handle peaks of 500psec width coming from a GaAs microstrip detector being hit by a MIP (minimum ionizing particle). This was in the early 90s, when we tested the possibility to use GaAs microstrip detectors for the ATLAS experiment at CERN (Geneva). In this range of frequencies nearly all the textbook formulas seem to become false. A cap behaves like an inductance and vice versa. Also, this is no longer electrostatics, but electrodynamics. There are no longer voltages dropping across the parts, but wave packets interacting with the setup. So, make no mistake, whenever you see such an evaluation board dealing with highest frequencies, the parts you see show experimentally gained values. David said:
let me know if you're interested in seeing a pdf of some plots :) Yes, of course, would be interesting. Kai |
| Topic | Author | Date |
| RF forum/question? | 01/01/70 00:00 | |
| Physician's Assistant? | 01/01/70 00:00 | |
| Daddy? | 01/01/70 00:00 | |
| Power Amp | 01/01/70 00:00 | |
| this is not a RF forum | 01/01/70 00:00 | |
| Power Amplifier | 01/01/70 00:00 | |
| my intent was not ... | 01/01/70 00:00 | |
| Power Attenuator | 01/01/70 00:00 | |
| What is your problem? | 01/01/70 00:00 | |
| not getting any output | 01/01/70 00:00 | |
| Don't forget C2, C12 and the stray capacitances | 01/01/70 00:00 | |
| a little more.. | 01/01/70 00:00 | |
| Don't take the values too seriously,... | 01/01/70 00:00 | |
| fair enough | 01/01/70 00:00 | |
Electrodynamics instead of electrostatics... | 01/01/70 00:00 |