Timeline for Determining amplitude of a 2 MHz sine wave
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Jan 26, 2015 at 14:45 | comment | added | Spehro 'speff' Pefhany | @swineone It should be designed not to affect the circuit any more than a sense resistor would. | |
| Jan 26, 2015 at 14:06 | comment | added | swineone | Also, given this is a resonant converter, I'm not sure if adding a transformer is a good idea. It would shift certain critical parameters of the circuit, such as resonant frequency, loaded Q factor, load matching, etc. | |
| Jan 25, 2015 at 13:13 | comment | added | swineone | After giving this some thought, I have to concur that 5% accuracy is a far more realistic specification. About the BJTs, I'd say biasing the BJT using a single supply would be problematic -- I'd need a resistive divider with resistances close to the value of the current sense resistor. Assuming a divider of two 1 Ω resistances and a 3.3 V supply, I'm looking at ~2 A of current through the resistors. I forgot to mention on the question, but this is a portable device, so this solution would be obviously unacceptable. | |
| Jan 24, 2015 at 12:31 | history | answered | Spehro 'speff' Pefhany | CC BY-SA 3.0 |