Sanyo EP58B specifications LA75520VA, LA75525VA

VIF/SIF Signal-Processing Circuit

LA75520VA

Overview

The LA75520VA is a completely adjustment-free PAL VIF/SIF IC for TV sets and VCRs. It supports IF frequencies of 38, 38.9, and 39.5 MHz. It integrates an automatic adjustment circuit for the VCO, an AFT circuit, and an audio carrier trap circuit on the same chip and requires the input of either a 4 MHz or 4.43 MHz reference signal.

Functions

Automatic adjustment VCO (no external VCO coil is required)

Built-in audio carrier trap supports the B/G, I, D/K, and M/N audio systems

Digital AFT adopted

Package: SSOP24 (275mil)

Block Diagram

SOUND CARRIER

VIF/SIF

RF AGC

*(Number)for VQFN

OUTPUT

INPUT

OUTPUT

SW15

V4

V3

AUDIO

SAWF(P)

SAWF

V2

OUTPUT

V1

1∝F

1∝F

0.022∝F

(S)

SW13

24

23

22

21

20

19

18

17

16

15

14

13

(24)

(23)

(22)

(21)

(20)

(19,18)

(17)

(16)

(15)

(14)

(13)

(12)

RF

AGC

VIF

DE-

AMP

1 stSIF

EMP

TRAP

AMP

IF

AGC

AGC

SPLI

VIDEO

DET

AMP

AMP

INT

VCO

FM

AFT

DET

TRAP

SW

APC

SIF

MODE

AMP

EQ

CTRL

AGC

AMP

(25)

(26)

(27)

(1,2)

(3)

(4)

(5)

(6)

(8)

(9)

(10)

(11)

1

2

3

4

5

6

7

8

9

10

11

12

AFT OUTPUT

0.01∝F

0.01∝F

0.033∝F

0.47∝F

150kΩ

1000P

330P

1000P

SW10

V3

VCC

3.3kΩ

SW11

V2

270kΩ

V1

VIDEO

SYSTEM SW

SYSTEM SW

4.43/4MHz

OUTPUT

A

B

VIF FREQ

VIF/SIF Signal-Processing Circuit

LA75525VA

Overview

The LA75525VA is a completely adjustment-free NTSC VIF/SIF IC for TV sets and VCRs. It supports IF frequencies of 45.75 and

58.75MHz. It integrates an automatic adjustment circuit for the VCO, an AFT circuit, and an audio carrier trap circuit on the same chip and requires the input of either a 4 MHz or 3.58 MHz reference signal.

Functions

Automatic adjustment VCO (no external VCO coil is required)

Built-in audio carrier trap; an external circuit may be used if desired

Digital AFT adopted

FM radio receiver function

Package: SSOP24 (225mil)

Block Diagram

SOUND CARRIER

VIF/SIF

RF AGC

*(Number)for VQFN

OUTPUT

INPUT

OUTPUT

AUDIO

SAWF(P)

SAWF

OUTPUT

SW15

0.01∝F

(S)

0.022∝F

1∝F

SW13

24

23

22

21

20

19

18

17

16

15

14

13

(24)

(23)

(22)

(21)

(20)

(19,18)

(27)

(16)

(15)

(14)

(13)

(12)

RF

AGC

VIF

AMP

1 stSIF

AMP

AMP

IF

AGC

AGC

SPLI

VIDEO

DET

FM

INT

VCO

DET

LIM

TRAP

AFT

AMP

TV

SW

INT

EXT

TV

APC

LIM

FM

MODE

AMP

FM

APC

CTRL

EQ

AMP

(25)

(26)

(27)

(1,2)

(3)

(4)

(5)

(6)

(8)

(9)

(10)

(11)

1

2

3

4

5

6

7

8

9

10

11

12

AFT OUTPUT

1∝F

560Ω

SW10

V4

1000P

VCC

4.5M

15∝F

SW11

V3

BPF

330kΩ

Ω

V2

270kΩ

330

V1

VIDEO

TV/FM

3.58/4MHz

OUTPUT

45 SANYO TV . VCR SANYO TV . VCR 46