Philips SA5211 - Manual (Page 17)

Philips Semiconductors
SA5211
Transimpedance amplifier (180 MHz)
Product specification Rev. 03 — 07 October 1998 17 of 28
9397 750 07427 © Philips Electronics N.V. 2001. All rights reserved.
This represents the maximum limit attainable with the SA5211 operating at 200 MHz
bandwidth, with a half mark/half space digital transmission at 850nm wavelength.
Fig 11. SA5211 – Block diagram.
INPUT
OUTPUT +
OUTPUT –
A1 A2
A3
A4 R F
SD00327
Fig 12. Transimpedance amplifier.
INPUT
OUT–
OUT+
PHOTODIODE
VB2
+
+
R 1 R 3 R 12 R 13
R 5
R 4
R 7
R 14 R 15
Q 1
Q 3
Q 2 Q 4
Q 15 Q 16
Q 11
Q 12
GND 2
GND 1
V CC2
V CC1
R 2
SD00328
Fig 13. Shunt-series input stage.
V CC
V EQ3
V IN
I IN
INPUT
I F
I B
Q1
Q2
Q3
R2
R3
R4
R F
R1 I C1
SD00329