| ??? 04/28/07 15:36 Read: times |
#138180 - Fundamental Logic and Hi-Z impedance Responding to: ???'s previous message |
Kia's idea is good and still meets the fundamental principals.
Voltage sources are low impedances...and it follows a. Logic 0 has a low impedance b. Logic 1 has a low impedance c. Tri-state / Hi-Z is a high impedance... or close to open circuit. Both Kia's and my concepts compare the effects of a tri-state logic gate against a., b. and c. above to determine the logic state. Another factor is which logic family or families you need to test and measure, as the logic voltage thresholds and input and output impedances are different... eg TTL, HC, HC/T, LVT, AU and others. Joe |
| 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 |