TDA1302T Philips Semiconductors, TDA1302T Datasheet - Page 13

• Manufacturer Part Number: TDA1302T
• Description: Data amplifier and laser supply circuit for CD player and read only optical systems
• Manufacturer: Philips Semiconductors

TDA1302_1 14 Wed Sep 14 13:30:56 1994
Philips Semiconductors
Application of other mechanisms
The TDA1302T can accommodate all laser/monitor
configurations with an N sub-laser diode. When an N
sub-monitor diode is used, external circuitry is required as
illustrated in Figs 11(a) to 11(d). Most of these
laser/monitor diode units have a variable resistor (R
parallel with the monitor diode which has been
pre-adjusted so that the voltage drop across this resistor
has a specific value at nominal laser diode output power.
The four circuits given each detail specific values for some
frequently used pick-up units as given in Table 3. Each
circuit has its own advantages. All circuits illustrated make
use of the fixed voltage (<200 mV) across the built-in
monitor resistor.
September 1994
Data amplifier and laser supply circuit for
CD player and read only optical systems
Fig.11 Applications of the laser/monitor units.
m
) in
14
Table 3 Pick-up units.
SLD104U
LT022MS
RLD-78MA
SF91
PICK-UP
UNIT
Sony corporation
Sharp corporation
Rohm corporation
Sony corporation
MANUFACTURER
Preliminary specification
KSM210 (Sony)
KSM210 (Sony)
KSM210 (Sony)
HOP-M3TR
(Hitachi)
CDV90V1 (Sanyo)
TDA1302T
APPLICATION