DET08CFC(/M)
Chapter 5: Common Operating Circuits
TTN020103-D02 Page
10
Chapter 5 Common Operating Circuits
Figure 2 Basic DET Circuit
The DET Series Detectors are designed according the circuit depicted above.
The detector is reverse biased to produce a linear response with applied input
light. The generated photocurrent is based upon the incident light and its
wavelength and can be viewed on an oscilloscope by attaching a load resistance
on the output of the detector. The RC Filter removes all high frequency noise
from the input supply, which otherwise may contribute to a noisy output.
Figure 3 Amplified Detector
On/Off
Switch
Protection Diode
Photodetector
V
BAT
RC Filter
External
Resistor
1 k
Ω
Capacitor
0.1 µF
V Bias
BNC
GND
GND
Battery
Voltage
Regulator
5V
R
LOAD
Photodetector
Transimpedance Amp
Out
Feedback
R
F
A
B
-V
BNC
GND
GND
GND
R
LOAD
