| ??? 08/07/05 11:57 Read: times |
#98952 - Re: Calculations. Responding to: ???'s previous message |
the listed input leakage current is 10 ua , the input impedence Rin becomes 5(VDD)/10e-6 = 0.5 Meg. as a thumb rule the reference setting divider should show the resultant 1/100 (firm) of the input impedance which is 0.005 meg or 5K. Dear Abhishek, Thanx for your reply. LPC922 is 3V chip should I take input impedence as 3 [Vdd ] / 10e-6 = 0.3Meg. & then resultant R19 = 3k or say 2k7. & then calculate rest of the values. Thanks & Regards, Prahlad |
| Topic | Author | Date |
| LPC9xx Comparators and Hysterisis | 01/01/70 00:00 | |
| Feedback resistor is not enough | 01/01/70 00:00 | |
| Is this allright | 01/01/70 00:00 | |
| Tested it. | 01/01/70 00:00 | |
| calculations | 01/01/70 00:00 | |
| Re: Calculations. | 01/01/70 00:00 | |
| step down rartio | 01/01/70 00:00 | |
| Values need a change | 01/01/70 00:00 | |
| Please show the analyses | 01/01/70 00:00 | |
| Re: Value Changes. | 01/01/70 00:00 | |
| my doubt is | 01/01/70 00:00 | |
| Answers | 01/01/70 00:00 | |
| 1N914 not Zener. | 01/01/70 00:00 | |
| Silent at many places | 01/01/70 00:00 | |
| Low pass filter | 01/01/70 00:00 | |
| Answer | 01/01/70 00:00 | |
| Zero crossing detection | 01/01/70 00:00 | |
Thanks | 01/01/70 00:00 |