| ??? 04/30/07 16:01 Read: times |
#138317 - not 'the first', but THE problem Responding to: ???'s previous message |
So, first we should add a biasing network, that forces the potential to drift to the nowheres's land, when the tristate output is in high-Z state. Here the first problem arises
With the extreme input impedance of CMOS, there is no way you can bias your probbe without the input the tristate is connected to 'seeing' your bias. Since this level is 'grey, the input may see it as high or as a low. now what does that do, well think of this a 'probe' that makes the circuit work when different when applied is worthless Erik |
| Topic | Author | Date |
| tri state input reading | 01/01/70 00:00 | |
| tri-state | 01/01/70 00:00 | |
| Reading TriState | 01/01/70 00:00 | |
| Hi-Z reading | 01/01/70 00:00 | |
| Logic Probe Concept | 01/01/70 00:00 | |
| Window Comparator | 01/01/70 00:00 | |
| Build Or Buy | 01/01/70 00:00 | |
| Using Analogue Methods to test for Hi-Z | 01/01/70 00:00 | |
| Spare ADC and DAC on your micro? | 01/01/70 00:00 | |
| search found | 01/01/70 00:00 | |
| Some mistake | 01/01/70 00:00 | |
| 100k resistor | 01/01/70 00:00 | |
| An idea... | 01/01/70 00:00 | |
| Fundamental Logic and Hi-Z impedance | 01/01/70 00:00 | |
| Some thoughts on the tristate detection | 01/01/70 00:00 | |
| not 'the first', but THE problem | 01/01/70 00:00 | |
| Heisenberg | 01/01/70 00:00 | |
agreed | 01/01/70 00:00 | |
| thank you | 01/01/70 00:00 |