6
10. SINGLE/MULTISTANDARD VIF/SIF-PLL and FM-PLL/AM DEMODULATOR TDA4470
The TDA4470 is an integrated bipolar circuit for multi-standard video / sound IF (VIF/SIF) signal processing, in TV/VCR and
multimedia applications. The circuit processes all TV video IF signals with negative modulation (e.g.. B/G standard) posidive
modulation (e.g.. L standard) and the AM, FM/NICAM sound IF signals.
11. COMBFILTER TDA9181
The TDA TDA 9181 is an adaptive PAL/NTSC comb filter with two internal delay lines, filters, clock control, and input clamps.
Video standards PAL B, G, H, I, M and N NTSC M are supported. Two CVBS input signals can be selected by means of input switch.
In addition to the comb filter the circuit contains an output switch so that a selection can be made between the combed CVBS
signal and an external Y/C signal. The supply voltage is 5V.
12. POWER SUPPLY (SMPS)
The DC voltages required at various parts of the chassis are provided by an SMPS transformer controlled by the IC MC44604
which is designed for driving, controlling and protecting switching transistor of SMPS. The transformer produces 150/115V for
FBT input, ±14V for audio output IC, S+2.5V and S+3.3V for microcontroller, +15V for vertical output (field scan) and +33V for
tuner and some other ICs and transistors.
13. MICROCONTROLLER SDA5555
The device is TV PRO tuning and control system based on the SDA 5555 TV TEXT microcontroller. It is designed for a low
cost mono TV-SET with analogue picture and sound control. Neverthless the system offers an on screen display (OSD) and
IR remote control of all functions.
SDA5555 has the following features:
- Display of program number, channel number, TV standard, analogue values, sleep timer, parental control, and mute is
done by OSD.
- Single LED for IR active, standby and on mode indication.
-
1 Control line to select external source.
- 3 Control lines for TV standard selection.
- Frequency synthesis tuning (62.5 kHz steps)
- 192 step fine tuning
- Channels corresponding to standards B/G, OIRT, L and I (I+)
- Mono sound control by analogue voltage
- System configuration with service mode
14. SERIAL ACCESS CMOS 8K (1024*8) EEPROM ST24C08
The ST24C08 is a 8Kbit electrically erasable programmable memory (EEPROM), organised as 4 blocks of 256*8 bits.
The memory is compatible with the I²C standard, two wire serial interface which uses a bi-directional data bus and serial clock.
The memory carries a built-in 4 bit, unique device identification code (1010) corresponding to the I²C bus definition.
This is used together with 1 chip enable input (E) so that up to 2*8K devices may be attached to the I²C bus and selected individually.
15. CLASS AB STEREO HEADPHONE DRIVER
TDA1308
The TDA1308 is an integrated class AB stereo headphone driver contained in a DIP8 plastic package.
The device is fabricated in a 1 mm CMOS process and has been primarily developed for portable digital audio applications.
16. SAW FILTERS
Saw filter type : Model:
G1965M
:
PAL-SECAM B/G MONO
G3962M
:
PAL-SECAM B/G GER&NIC STEREO, PAL I NIC STEREO, INT-1
G1984
:
PAL-SECAM B/G GER&NIC STEREO INT-2
J1951M
:
PAL-I MONO
J3950M
:
PAL-I NIC STEREO
J1956M
:
PAL-I MONO
K2955M
:
PAL-SECAM B/G-D/K MONO, PAL-SECAM B/G-D/K-I, MONO, PAL-SECAM B/G-D/K-L MONO
K2958M
:
PAL-SECAM B/G-D/K (38) MONO
K2962M
:
PAL-SECAM B/G-L/L MONO
G3957M
:
PAL-SECAM B/G-L/L GER&NIC BG/L STEREO
K6256K
:
PAL-SECAM B/G-D/K-I-L/L MONO, PAL-SECAM B/G-D/K-I, L/L GER&NIC BG/L STEREO,
PAL-SECAM B/G-D/K-I-L/L I, NICAM STEREO, PAL-SECAM B/G-D/K-I-L/L GER&NIC I-B/G-L, STEREO
K6259K
:
PAL-SECAM B/G-D/K-I-M/N (EURO) MONO
M1963M
:
PAL M/N MONO, NTSC M MONO, PAL M/N-NTSC M MONO
17. BTSC STEREO/SAP/DBX-DECODER and AUDIO PROCESSOR TDA9855
The TDA9855 is a BTSC stereo/SAP/dbx decoder and audio processor. It performs all functions to transform the composite
baseband signal into the appropriate audio output signals to line out and to the loudspeaker output stages.
