col_implant
New Member
Hi,
I'm about to begin a project on optical detection. We are stimulating a sample with light and examining the output. The phase between output and input is most important property and we need to measure it down to 0.1 degree.
For our light input we will use an LED. Since the phase is so important we need a circuit that can switch the led in a perfect square wave, upto about 100KHz. So need to turn the LED from fully off to fully on in a minimum of time.
Can anyone suggest a circuit to acomplish this? Most conventional LED circuits have quite a long transient so are unacceptable. Also is there a particular type of LED which should be used?
Cheers
C
I'm about to begin a project on optical detection. We are stimulating a sample with light and examining the output. The phase between output and input is most important property and we need to measure it down to 0.1 degree.
For our light input we will use an LED. Since the phase is so important we need a circuit that can switch the led in a perfect square wave, upto about 100KHz. So need to turn the LED from fully off to fully on in a minimum of time.
Can anyone suggest a circuit to acomplish this? Most conventional LED circuits have quite a long transient so are unacceptable. Also is there a particular type of LED which should be used?
Cheers
C
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