IS1U20

Circuit Block Diagram

Vout

Vcc

GND

Amp.

Comparator

Photodiode

Ro= 22k

Ω

Auto bias current

control circuit

φ

φ

Receiving distance : L

IS1U20

Oscilloscope

*1

Transmitter

*1 Transmitter shall use the light emitting diode GL550 (

λp=850 to 900 nm) and be adjusted to the radiant intensity of 40mW/sr.

Transmitter radiant intensity : 40 mW/sr

90%

50%

10%

*3 Input signal waveform

*4 Output waveform regulation

*5 Optical system

3

1

2

T =416.7

µs and T =78.1µs at BR=2.4kbps

12

T =8.68

µs and T =1.63µs at BR=115.2kbps

12

(

φ : Horizontal and vertical directions)

s