| Author |
Message |
IndiJones
Joined: 13 Aug 2001
Posts: 157
|
 13 Aug 2001 4:53 |
|
|
|
| Need some help on this subject. Thanks!
|
|
| Back to top |
|
 |
jk
Joined: 05 Jun 2001
Posts: 20
|
| 13 Aug 2001 8:32 |
|
|
|
| What do you want to know ?
|
|
| Back to top |
|
|
aNdreiBuuu
Joined: 30 Apr 2001
Posts: 399
Helped: 11
|
| 13 Aug 2001 11:50 |
|
|
|
U'll found some apps note @ Bu*rrBrown (Texa*s In*stuments)...
best,
//a
|
|
| Back to top |
|
|
jk
Joined: 05 Jun 2001
Posts: 20
|
| 13 Aug 2001 13:59 |
|
|
|
If you want to read something, take a look at this :
Photodiode amplifiers : op amp solutions / Jerald G. Graeme. - New York [u.a.] : McGraw Hill, 1996
|
|
| Back to top |
|
|
Alexg
Joined: 14 May 2001
Posts: 51
|
| 13 Aug 2001 21:23 |
|
|
|
| Quote: |
On 2001-08-13 14:59, jk wrote:
If you want to read something, take a look at this :
Photodiode amplifiers : op amp solutions / Jerald G. Graeme. - New York [u.a.] : McGraw Hill, 1996
|
I have the book and it is really great, complete with almost all the information you can get about transimpedance amplifiers. Do you need any specific help ?
|
|
| Back to top |
|
|
IndiJones
Joined: 13 Aug 2001
Posts: 157
|
| 14 Aug 2001 2:40 |
|
|
|
I've heard about the book. But the problem is that it will take at least a month for me to get the book from Mcgraw-Hill since I'm living in Japan.
I'm trying to develop an optical sensor in which changes of optical intensity will be detected by the photo diode. Since the photodiode current is very small I need to design a current to voltage converter and an amplifier for that purpose. I know how to do that (the circuits) but I need to know the parameters and other details about designing a good photodiode amplifier.
|
|
| Back to top |
|
|
hwswboy
Joined: 02 Jul 2001
Posts: 107
|
| 14 Aug 2001 12:26 |
|
|
|
Look this TI app note: http://www.ti.com/sc/docs/psheets/abstract/apps/sboa061.htm
|
|
| Back to top |
|
|
jk
Joined: 05 Jun 2001
Posts: 20
|
| 14 Aug 2001 14:35 |
|
|
|
define "small" concerning the input current range : nA, pA ...
what SNR do you like to get ?
|
|
| Back to top |
|
|
jk
Joined: 05 Jun 2001
Posts: 20
|
| 14 Aug 2001 14:54 |
|
|
|
| oh and 3db-frequency would be useful to get an overview of your needs ...
|
|
| Back to top |
|
|
Alexg
Joined: 14 May 2001
Posts: 51
|
| 15 Aug 2001 1:10 |
|
|
|
| Quote: |
On 2001-08-14 13:26, hwswboy wrote:
Look this TI app note: http://www.ti.com/sc/docs/psheets/abstract/apps/sboa061.htm
|
Another very nice paper on the subject. Take a look at it and please tell us more about your problem. Are you sensing reflections or direct light ?? Do you need to reject ambient light ? Is the light source modulated ? At wich frequency ?
Please be more specific and we might be able to help you more..
Best regards,
Alexg
|
|
| Back to top |
|
|
IndiJones
Joined: 13 Aug 2001
Posts: 157
|
| 15 Aug 2001 2:23 |
|
|
|
| Here's the problem. I need to construct three photodiode amplifiers that will amplify the refrected (not reflected) lights from three LEDs driven at 500, 1000, 2000 Hz. I don't need to reject the ambient lights cause the PD will be encased in a dark casing. The current is in uA (micro amps)range. The upper and lower 3dB frequencies should be as close to the center frequency as possible.
|
|
| Back to top |
|
|
Alexg
Joined: 14 May 2001
Posts: 51
|
| 15 Aug 2001 3:32 |
|
|
|
| That should be pretty easy to do. Take a look at the ap note, breadboard it and ask us if things do not go as you want. The application note should have all that you need.
|
|
| Back to top |
|
|
Ratburn
Joined: 13 Jul 2001
Posts: 30
|
| 15 Aug 2001 5:04 |
|
|
|
| Check out http://www.taosinc.com they have some integrated photodiode/amp sensors that I have used successfully in some designs.
|
|
| Back to top |
|
|
anadeem
Joined: 24 Jun 2006
Posts: 9
|
| 21 Sep 2006 22:25 Re: PhotoDiode Amplifier Design |
|
|
|
HI ,
PLEASE UPLOAD PHOTODIODE
AMPLIFIER BOOK ON RAPIDSHARE .
THANK YOU
|
|
| Back to top |
|
|
ISO_GSO
Joined: 18 Aug 2008
Posts: 4
|
| 18 Aug 2008 17:42 PhotoDiode Amplifier Design |
|
|
|
how is that book downloadable from rapidhshare ?
thanks
|
|
| Back to top |
|
|
D_A_V_E
Joined: 13 Nov 2007
Posts: 52
Helped: 3
|
| 20 Aug 2008 14:36 Re: PhotoDiode Amplifier Design |
|
|
|
check this book it will help you i guess
page 4.39
|
|
| Back to top |
|
|
ISO_GSO
Joined: 18 Aug 2008
Posts: 4
|
| 05 Sep 2008 5:47 Re: PhotoDiode Amplifier Design |
|
|
|
I also need help in designing a photodiode amplifier as I am a beginner. The photodiode amplifier must have a broad dynamic range.
I am really lost on how to proceed. I dont know what gain the amplifier should have.
Please help.
Thanks in advance.
|
|
| Back to top |
|
|
Analog_man
Joined: 24 Aug 2008
Posts: 7
|
| 09 Sep 2008 4:23 Re: PhotoDiode Amplifier Design |
|
|
|
Check following website under Articles, you will find a nice article that explains the optical circuits
www.astinco.com
|
|
| Back to top |
|
|
