| ??? 08/18/08 16:03 Read: times |
#157547 - Richard........................... Responding to: ???'s previous message |
You're punting, back pedaling, and using a lame set of justifications for your position and suggestions to Koosha. Give it up; you look foolish enough already!!!
I redid the simulation with the load at 51 ohms and 1K ohm. You can see it in the attached PDF file. N-FET Common Source Loads @51 and @1K The FET has a threshold!! Sure it varies from device to device and with load current. But the fact of the matter exists that N-FETs used as high side switches require gate drive above the supply voltage. Same situation exists for using N-FETs in the tops of H-Bridges and the half bridges used to drive BLDC motor windings. Michael Karas |
| Topic | Author | Date |
| How to turn on/off another MCU | 01/01/70 00:00 | |
| Low-power mode? | 01/01/70 00:00 | |
| not a power consumption issue | 01/01/70 00:00 | |
| correction | 01/01/70 00:00 | |
| Logic MOSFET | 01/01/70 00:00 | |
| P-Channel Enhancement Mode Better | 01/01/70 00:00 | |
| that's why they make logic MOSFET's | 01/01/70 00:00 | |
| Makes No Difference | 01/01/70 00:00 | |
| Perhaps you should try a logic-MOSFET | 01/01/70 00:00 | |
| It Still Makes No Difference | 01/01/70 00:00 | |
| Maybe it's the load current | 01/01/70 00:00 | |
| Richard........................... | 01/01/70 00:00 | |
| I wouldn't say that ... | 01/01/70 00:00 | |
| possibly simpler idea | 01/01/70 00:00 | |
Thank you all, | 01/01/70 00:00 |