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U4460BG-M

Video IF Amplifier with FPLL Demodulation

Description

The U4460BG-M is an integrated bipolar circuit for video

IF (VIF) signal processing in TV/VCR and multimedia

applications.

The circuit processes all TV video IF signals with

negative modulation (e.g., B/G standard).

Features

D

Active carrier generation by FPLL principle

(frequency-phase-locked-loop) for true

synchronous demodulation

D

Very linear video demodulation, good pulse

response and excellent intermodulation figures

D

VCO operates on picture carrier frequency

D

Alignment-free AFC, no external reference circuit

D

VIF鈥揂GC with peak sync. detection

D

Tuner AGC with adjustable take over point

D

5 V supply voltage; low power consumption

D

Relevant pinning is compatible with the

TDA4474 /71 video-/ sound IF combination

Package:

SDIP28

Offset

comp.

(optional)

Loop

filter

VCO

VIF

6

Video det.

AGC

(VIF)

C

AGC

7

Tuner 12

11

Take over point

Tuner

AGC

Supply

95 9815

Figure 1. Block diagram

Rev. A3, 08-Mar-01

脧

脧

脧脧 脧

脧

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脧

脧

脧

脧

脧

5

3,8,17

FPLL

0擄

90擄

VCO

+

phase shift

AFC

VIF amp

脧

脧脧 脧

脧脧 脧

23

AFC

13

Video

24

18

V

S

C

Ref

1 (9)

脧脧 脧

脧脧 脧

脧

脧

脧

脧

27

19

22

21

AFC

20 switch

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next

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