9 Threads found on edaboard.com: Photodiode Switch
I want to control the Bias and Modulation current of a laser diode using a microcontroller, a DAC and discrete components (including operational amplifiers).
Current range 3mA to 25mA with 0.1mA step.
Current pulses: rise time few nanoseconds, 10% max overshoot
I have found this circuit from TI that controls the current based on its
Analog Circuit Design :: 01-29-2015 04:44 :: GeoAVR :: Replies: 5 :: Views: 217
I am using a photodiode SFH206K (datasheet attached with the mail). The laser light is incident on the photodiode with a frequency of 10 and 20 Hz. Can you suggest me proper value of the RC filter given in the circuit attached with the mail. I tried with R7 = 220K and C55 = 100nF but none of the lights are detected and if I neglect the f
Analog IC Design and Layout :: 06-05-2013 08:01 :: nacoolp :: Replies: 1 :: Views: 392
switch noise: all switch noise and photodiode noise.
Analog IC Design and Layout :: 03-31-2013 10:11 :: samuel :: Replies: 2 :: Views: 298
The SFH2400 is OK.
I don't know why you want 10ns precision, but you won't get it with the circuit you refer to in the data sheet. Well, maybe with a 50 ohm load you might, but with RBE=10M you will more likely be something like 100us or slower. To get 10M ohm with 10ns response time will be a tall order in a single stage even with a good tran
Hobby Circuits and Small Projects Problems :: 10-25-2010 04:14 :: keith1200rs :: Replies: 14 :: Views: 5089
I have not being a member of edaboard for a long time so please inform me if I can place this post in a better place. I thought that this would be a good place since PIN diode are used a lot in RF applications, although this is not an RF application.
I need a good source of information (Technical or Application notes) on
RF, Microwave, Antennas and Optics :: 06-16-2009 13:35 :: CVT :: Replies: 4 :: Views: 3344
Why don't you use a photodiode instead.It's worth a try .Anyway your project is fabulous and very exciting
Microcontrollers :: 10-31-2006 01:43 :: ajaykumar988 :: Replies: 2 :: Views: 1118
Your photodiode is in wronge direction, you must reverse the diode direction.
Hobby Circuits and Small Projects Problems :: 05-12-2006 11:19 :: leotim :: Replies: 7 :: Views: 1840
I need suggection for the circuit with following requirements :
- Circuit should withstand against dark current fluctuations from photodiode and maintain its output .
- low OFF current (no more 5 uA)
- low voltage (2 - 4 V)
- switch ON slew rate max 3 usec
- switch OFF slew rate amx 10 usec
- Temperature range -30 - 75 C
Analog Circuit Design :: 02-18-2006 07:24 :: artem :: Replies: 0 :: Views: 754
A problem about an integrator simulation;
when i simulate an integrator ,a warning is followed that missing bulk source(a reset MOS switch ) would be forwardly biased. i do not know why?
1.a photodiode is connected to negative input terminal of operational amplifer.
2. a 2.5v referrence voltage is connected to positiv
Analog IC Design and Layout :: 06-01-2005 23:26 :: samuel :: Replies: 0 :: Views: 797