DRP3510 Datasheet, PDF (4/30 Pages) List of Unclassifed Manufacturers – Digital Receiver Front-end

DRX 3960A
ADVANCE INFORMATION
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
f_ref
Clock
Generation
IF In
TOP
DSP
A
D
I²C
Fig. 1–1: Block diagram of the DRX 3960A
4
TAGC
VAGC EQU
AAGC
D
A
D
A
D
A
Tuner
AGC
CVBS
2^nd SIF
Micronas