| ??? 12/06/06 06:19 Read: times |
#129046 - Thank you!!!!!!!! Responding to: ???'s previous message |
Dear Kai,
So, what you want to design is a Go / No Go - tester. In this case you only need to be precise at the threshold of 20nA leakage current, which simplifies the situation. Yes, exactly. Thank you very very very much for your detail and informative post Kai. In my design, I didn't think of ESD problem; therefore, I didn't have any protection for that. I only have guarding circuit. Thank you for pointing it out before I've gone too far. Until now I have not completed the design yet, most of the things are still in the evaluating process, and some parts are partially tested. I will test your circuit and post back the result. Kai, if I use your circuit, I would use MOSFET for the switch. I also think of using a regulator with on/off control pin. The reason is because I have 24V source available, and I want to bring it down to 20V with a regulator. Would it be Ok to switch on/off with a regulator with on/off control? Does T_on of the switching device have any effects on ESD protection circuit? I hope it's not. Best regards, T.L |
| Topic | Author | Date |
| Instrumentation Amplifier and Wheatstone bridge | 01/01/70 00:00 | |
| You need something high impedant | 01/01/70 00:00 | |
| High impedance | 01/01/70 00:00 | |
| Exactly! | 01/01/70 00:00 | |
| High impedance | 01/01/70 00:00 | |
| It should work but... | 01/01/70 00:00 | |
| It should work but... | 01/01/70 00:00 | |
| Offset voltage too high | 01/01/70 00:00 | |
| Offset voltage too high | 01/01/70 00:00 | |
| sources | 01/01/70 00:00 | |
| Sources | 01/01/70 00:00 | |
| have you considered that???? | 01/01/70 00:00 | |
| Details | 01/01/70 00:00 | |
| Details | 01/01/70 00:00 | |
| Go / No Go - tester | 01/01/70 00:00 | |
| Thank you!!!!!!!! | 01/01/70 00:00 | |
| T_on has no effect, but... | 01/01/70 00:00 | |
| Got it ;D | 01/01/70 00:00 | |
| Please modify your account, so that... | 01/01/70 00:00 | |
Site setting has been changed | 01/01/70 00:00 |