| ??? 01/29/07 18:22 Read: times |
#131656 - CMOS likes voltage Responding to: ???'s previous message |
As CMOS inputs are very high impedance, voltage is the best way to specify logic levels. This was not the case with bipolar TTL devices.
Outputs are generally specified as both voltage and current. And I agree with Andy that voltage is much easier to measure. You would have to break the trace to measure a current. |
| Topic | Author | Date |
| Why people used to use voltage instead of current? | 01/01/70 00:00 | |
| voltage vs current | 01/01/70 00:00 | |
| CMOS likes voltage | 01/01/70 00:00 | |
| Do we? | 01/01/70 00:00 | |
| Current signals are widely used in technics! | 01/01/70 00:00 | |
| There is "current-mode" logic, too. | 01/01/70 00:00 | |
| including good ol' TTL | 01/01/70 00:00 | |
| Wait a minute... | 01/01/70 00:00 | |
Please don't look bad at me Mr Andy Neil | 01/01/70 00:00 | |
| Why people ask questions & then just run away? | 01/01/70 00:00 | |
| IIRC, Cyrille is in war-torn Africa ... | 01/01/70 00:00 | |
| Cyrille is a nice guy! | 01/01/70 00:00 | |
| Yes, and exceedingly polite and respectful | 01/01/70 00:00 |