VESTEL 17MB15 User Manual download pdf (Page 13)

VIF amplifier, Tuner and VIF-AGC, VIF-AGC detector, Frequency Phase-Locked Loop (FPLL) detector, VCO and

divider, Digital acquisition help and AFC, Video demodulator and amplifier, Sound carrier trap, SIF amplifier, SIF-AGC

detector, Single reference QSS mixer, AM demodulator, FM demodulator and acquisition help, Audio amplifier and

mute time constant,

I²C-bus transceivers and MAD (module address), Internal voltage stabilizer.

7. MULTI STANDARD SOUND PROCESSOR

The MSP34x0G family of single-chip Multistandard Sound Processors covers the sound processing of all analogue TV-

Standards worldwide, as well as the NICAM digital sound standards. The full TV sound processing, starting with analogue

sound IF signal-in, down to processed analogue AF-out, is performed on a single chip.

These TV sound processing ICs include versions for processing the multichannel television sound (MTS) signal

conforming to the standard recommended by the Broadcast Television Systems Committee (BTSC). The DBX

noise reduction, or alternatively, Micronas Noise Reduction (MNR) is performed alignment free. Other processed

standards are the Japanese FM-FM multiplex standard (EIA-J) and the FM Stereo Radio standard.

Current ICs have to perform adjustment procedures in order to achieve good stereo separation for BTSC and EIA-J. The

MSP 34x1G has optimum stereo performance without any adjustments.

8. VIDEO SWITCH TEA6415

In case of three or more external sources are used, the video switch IC TEA6415 is used. The main function of this device is

to switch 8 video-input sources on the 6 outputs.

Each output can be switched on only one of each input. On each input an alignment of the lowest level of the

signal is made (bottom of sync. top for CVBS or black level for RGB signals).

Each nominal gain between any input and output is 6.5dB.For D2MAC or Chroma signal the alignment is switched off by

forcing, with an external resistor bridge, 5VDC on the input. Each input can be used as a normal input or as a MAC or

Chroma input (with external Resistor Bridge). All the switching possibilities are changed through the BUS. Driving 75ohm

load needs an external resistor. It is possible to have the same input connected to several outputs.

9. AUDIO AMPLIFIER STAGE WITH TPA3004D2

The TPA3004D2 is a 12-W (per channel) efficient, Class-D audio amplifier for driving bridged-tied stereo speakers. The

TPA3004D2 can drive stereo speakers as low as 4 Ω. The high efficiency of the TPA3004D2 eliminates the need for

external heatsinks when playing music.

Stereo speaker volume is controlled with a dc voltage applied to the volume control terminal offering a range of gain from –

40 dB to 36 dB. Line outputs, for driving external headphone amplifier inputs, are also dc voltage controlled with a range

of gain from –56 dB to 20 dB.

An integrated 5-V regulated supply is provided for powering an external headphone amplifier.

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VESTEL 17MB15 User Manual Page 13