| ??? 05/08/11 02:13 Modified: 05/08/11 02:22 Read: times |
#182198 - pulsed light Responding to: ???'s previous message |
Kai said:
The sensor contains an amplifier. The gain can be configured by R1 and R2. C seems to form a high pass characteristic with a corner frequency of f = 1/2/pi/R2/C. Thanks,I guess you are right,because when i put a potentiometer instead of R1, at some pot places the sensor output pulsed with some frequensies arround 180khz, so if i need to capture 100 khz input light, 1-what are typical values for best performance for r1,r2 and c? 2-can i place a lowpass filter in sensor output before the signal conditioning stage? if yes , what is corner frequency of this lowpass filter? Kai said:
R1 in the given formula is a typo, I guess what is typo,kai? Kai,i really appreciate you,and i don't know, how i can recompense your kindness |
| Topic | Author | Date |
| Datasheet question???? | 01/01/70 00:00 | |
| where | 01/01/70 00:00 | |
| High pass filter... | 01/01/70 00:00 | |
| pulsed light | 01/01/70 00:00 | |
| "typo" | 01/01/70 00:00 | |
| Thanks Andy | 01/01/70 00:00 | |
| chopping... | 01/01/70 00:00 | |
| DC Offset | 01/01/70 00:00 | |
| But gain is different for AC and DC! | 01/01/70 00:00 | |
| But gain is different for AC and DC? | 01/01/70 00:00 | |
| C reduces the gain for DC | 01/01/70 00:00 | |
I understood much more about this sensor | 01/01/70 00:00 | |
| Thank You Very Much | 01/01/70 00:00 |