MTS Stereo Encoder, Rev. 0.5

2

PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE

Freescale Semiconductor

Reference Documentation

•

Extended low frequency response (The MC44C401L frequency response extends below 25 Hz)

•

Simple passive interface to Motorola’s MC44BC374 (UHF/VHF) and MC44BC375 (VHF) modulators

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Preservation of original surround sound fidelity

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System performance not impacted by copy protection technologies

•

Enables lower system component count, smaller board size, and significantly lower overall system cost

•

Eliminates manual alignment of filters, phase controls, and composite signal amplitude

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Reference Documentation

“Multichannel Television Sound Transmission and Audio Processing Requirements for the BTSC System”, FCC

OET Bulletin No. 60, February 1986.

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Block Diagrams

Figure 1. MC44C401L Block Diagram

Clock

Generator

MC44C401L

Oscillator

APLLVDD

APLL

XTALIN

XTALOUT

APLLVSS

Σ∆

ADC

V-REF

Σ∆

ADC

Sync

Separator

Sync

Separator

Reference

Σ∆

DAC

DACVDD

CA

DACVSS

CLK4MHZ

DVSS

OVDD

DVSS

DVDD

DVSS

DVSS

DVSS

Audio

Processor

VID_PRES

ADCVDD

VINLP

VAGO

VREFP

VAGO

VREFM

VINRP

VAGO

ADCVSS

CVBS

SSVDD

SSVSS

30

28

27

29

7

9

10

4

6

5

2

3

8

1

31

32

17

18

19

20

21

24

25

26

16

15

11

22

4MHz