12
11. IC DISCRIPTION AND PIN DETAILS
•
TDA
9351
Æ
TV Signal processor- Teletex decoder with embedded microcontroller
•
HEF
4052BP-
Æ
Video Switch
•
STV
9302-
Æ
Vertical Deflection Output
•
24C16-
Æ
Memory IC
•
TDA
9859-
Æ
Sound Processor
•
AN
17821-
Æ
Sound Output
•
KA
5Q0765-
Æ
STR
•
Video
amplifier.
11A. TDA 9351:-
This IC is the functions of a TV signal processor together with a
microcontroller and US Closed Caption decoder. The IC is used in television receivers with
90degree and 110 degree
picture tubes. The ICs have supply voltages of 8 V and 3.3 V and
they are mounted in S-DIP envelope with 64 pins. This IC is having higher degree of
integration because delay line with adjustable delay time, PAL / SECAM / NTSC decoder has
been integrated. In addition to this some special features like Continuous Cathode
Calibration’, white point and black level offset, AVL are added in this version. As this is a
combination of microcontroller and TV signal processor, the features of IC are divided in two
sections
TV Signal processor Important Features
•
Internal (switchable) time-constant for the IF-AGC circuit.
•
A choice can be made between versions with mono intercarrier sound FM
demodulator and versions with QSS IF amplifier.
•
The mono intercarrier sound versions have a selective FM-PLL demodulator which
can be switched to the different FM sound frequencies (4.5/5.5/6.0/6.5 MHz).The
quality of this system is such that the external band-pass filters can be omitted.
•
Source selection between ‘internal’ CVBS and external CVBS or Y/C signals
•
Integrated chrominance trap circuit
•
Integrated luminance delay line with adjustable delay time
•
Asymmetrical ‘delay line type’ peaking in the luminance channel
•
Black stretching for non-standard luminance signals
