DRP3510 datasheet(4/30 Pages) ETC

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DRX 3960A

ADVANCE INFORMATION

Micronas

Digital Receiver Front-end

Release Note: Revision bars indicate significant

changes to the previous edition.

1. Introduction

The Digital Receiver Front-end DRX 3960A performs

the entire multistandard Quasi Split Sound (QSS) TV

IF processing, AGC, video demodulation, and genera-

tion of the second sound IF (SIF) with only one SAW

filter. The IC is designed for applications in TV sets,

VCRs, PC cards, and TV tuners.

The alignment-free DRX 3960A needs no special

external components. All control functions and status

registers are accessible via I2C bus interface. There-

fore, it simplifies the design of high-quality, highly stan-

dardized IF stages.

Due to its mixed signal structure and the digital

demodulation, the IC offers unique features and is pre-

pared for digital TV.

1.1. Features

– Multistandard QSS IF processing with a single SAW

– Highly reduced amount of external components (no

tank circuit, no potentiometers, no SAW switching)

– Programmable IF frequency

(38.9 MHz, 45.75 MHz, 32.9 MHz, 36.125 MHz etc.)

– Digital IF processing for the following standards:

B/G, D/K, I, L/L’, and M/N

– Standard specific digital post filtering

– Standard specific digital video/audio splitting

– Standard specific digital picture carrier recovery:

• alignment-free

• quartz-stable and accurate

• stable frequency lock at 100% modulation and

overmodulation up to 150%

• quartz-accurate AFC information

– Programmable standard specific digital group delay

equalizing

– Automatically frequency-adjusted Nyquist slope,

therefore optimal picture and sound performance

over complete lock in frequency range

– Standard-specific digital AGC and delayed tuner

AGC with programmable tuner Take Over Point

– Fast AGC due to linear structure

– Adaptive back porch control, therefore fast positive

modulation AGC

– No sound traps needed at video output

– Second SIF output with standard dependent pre-fil-

tering and amplitude controlled output level

– Optimal sound SNR due to carrier recovery without

quadrature distortions

– FM radio capability without external components

and with standard TV tuner

– Prepared for digital TV (DVB-C, DVB-T, ATSC)

– I2C bus interface

Fig. 1–1: Block diagram of the DRX 3960A

Clock

DSP

CVBS

2nd SIF

Generation

I2C

IF In

Tuner

fref

TOP

AGC

TAGC

VAGC

AAGC

EQU

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