| ??? 02/11/06 19:58 Read: times |
#109782 - Component Purposes Responding to: ???'s previous message |
Suresh,
* Q4 (BC557) appears to reduce the impedance of the adjustment leg of the LM338 regulator when the regulator voltage drops. You figure out why the ouput voltage of the LM338 regulator drops. * R12 appears to be the current sense resistor after current passes through Q1 and Q2, * Q2 is the pass element regulating the current, * I'd guess R1 limits input current/energy to the op-amp due to noise present in the plating process (add a cap and tranzorb to ground at the juction of R1, R9 & R12, * No effect on pin 1 output due to R1. Bruce |
| Topic | Author | Date |
| 3A constant current source | 01/01/70 00:00 | |
| Where did you find it? | 01/01/70 00:00 | |
| Ripple | 01/01/70 00:00 | |
| plating purpose | 01/01/70 00:00 | |
| I got it from a person known to me | 01/01/70 00:00 | |
| replies | 01/01/70 00:00 | |
| plating circuit | 01/01/70 00:00 | |
| Compliance of source | 01/01/70 00:00 | |
| yes | 01/01/70 00:00 | |
| Think about that | 01/01/70 00:00 | |
| Component Purposes | 01/01/70 00:00 | |
| This circuit will never work! | 01/01/70 00:00 | |
| Could it be? | 01/01/70 00:00 | |
| Function | 01/01/70 00:00 | |
| issues | 01/01/70 00:00 | |
| plating quality control. | 01/01/70 00:00 | |
| Answers | 01/01/70 00:00 | |
| followups | 01/01/70 00:00 | |
| Answers II | 01/01/70 00:00 | |
| followups & Back EMF's? | 01/01/70 00:00 | |
Floating regulator | 01/01/70 00:00 |