GTD-18441 Rev. 3.0
1
Electronic Components
KGL4135HW/KGL4135GW
TYPICAL APPLICATION
Chip
Capacitor
≥ 0.1µF
KGL4135HW
/KGL4135GW
GND
VB1
X-Point Control
Inverted Data Input
50Ω
INB
IN
Blocking
Capacitor
Ex. 0.1µF
OUT
EAM
Data Input
Chip
Capacitor
VB2
≥ 0.1µF
Chip
Capacitor
≥ 0.1µF
APPLICATION NOTE
1. For stable operation;
1-1. To prevent a dependence of “X-Point” on the supply voltage VS,
(1) Use an external voltage source of –3.8V for “VB2”, or
(2) Control the voltage of “VB1”, so that the voltage difference “VB1–VB2” is constant.
1-2. To prevent a dependence of “Output amplitude” on the supply voltage VS,
Control the voltage of “VC1”, so that the voltage difference “VC1–VS” is constant.
1-3. To prevent a dependence of “Output bias control voltage” on supply voltage VS,
Control the voltage of “VC2”, so that the voltage difference “VC2–VS” is constant.
2. Power-up/shut-down sequence;
For power-up, supply control voltages (VB1, (VB2), VC1, VC2) at first, then Vs. For shut-down,
Vs at first, then control voltages.
Customer does not need to care about the sequence for the control voltages (VB1,(VB2),VC1,VC2).
3. Under “no signal input” condition, the operation may not be stable.
7/8
OKI [ OKI ELECTRONIC COMPONETS ]
