Photomultiplier output-gating circuit


Posted on Jun 3, 2012

The application involves observing the light pulse emerging from a thick specimen after transillumination by a laser pulse. Pulses derived from the laser source are amplified using a Video Amplifier LM733. The reference level is set to 1 V in the comparator LM 710, to provide the necessary trigger pulses for the monostable multivibrator 74121. The laser pulses have a repetition frequency of 500 Hz and suitable values are as below: Rl = 33 k ohm, Cl = 22 pF R2 = 33 k ohm, C2 = 68 nF.


Photomultiplier output-gating circuit
Click here to download the full size of the above Circuit.

The pulse width for each monostable is approximately given by tw = 0.7 RC. R3 and C3 is a high pass filter. The method therefore permits the use of low cost components having moderate response times for extracting the pulse of interest.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Logic Tester
Soft Musical Telephone Ringer by UM66T
GPZ spike Detector
local oscillator
12 Volt DC Fluorescent Lamp Driver
CXG1024N High-frequency Spdt Antenna Switch
The Measurements for MIT 3DL1 Run
Propeller Clock
Infrared-Led based Wireless Data & Voice Communication withCircuit
2002 Chevy Cavalier heater/AC temp control wont light up at nite
16F54 fickle!
High-frequency signal output amplifier
AD524J type thermocouple cold junction temperature compensation circuit



Top