Sanyo EP58B - Manual (Page 25)

LA7567BM/BVA
47 48 SANYO TV . VCR SANYO TV . VCR
LA75676V/676VA
FM
DET
RF
AGC AGC
1st
DET AFT
LIM
AMP
EQ
AMP
MIX
HPF
HPF
HPF
1st
AMP
330 Ω
150 Ω
330 Ω
560 Ω
10k Ω 1 µ F
+
15 µ H
0.47 µ F 100 µ F 0.01 µ F
+
VCC
0.01 µ F
(M)
0.022 µ F 0.01 µ F
TSF5220
(M)
0.015 µ F
1 µ F 1000pF
30k Ω
1k Ω
5.6k Ω
10k Ω -B
100k Ω
100k Ω
2.2k Ω
VIDEO
OUT
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
VIDEO
DET
LIF
AMP IF
AGC
VCO
BPF
GND
AFT
OUT
RF AGC
OUT
9V
SAW(P)
SAW
(S)
IN PUT
GND
+ AF OUT
FM
DET RF
AGC
AFT
LIM
AMP 6 bB
EQ
AMP
HPF
330 Ω
4.5 MHz
330 Ω
560
Ω
1 µ F
+
15 µ H
0.47 µ F 1 µ F 0.01 µ F
+ +
VCC
0.01
µ F
(M) 0.015
µ F
(M)
0.01 µ F
(M)
0.01 µ F
1 µ F
1000pF
300pF 1000pF
30k
Ω 6.8k
Ω
7.5k Ω
10k
Ω -VR
0-10k
Ω
120k
120k
2.2k Ω
VIDEO OUT
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
VIDEO
DET
VIF
AMP IF
AGC
VCO
BPF
GND
AFT OUT
RF AGC
OUT
SAW(P)
IN PUT
GND
+ AF OUT
VCC
4.5MHz
OUT
Overview
Functions and Features
Overview
Functions and Features
VIF/SIF Signal-Processing Circuit VIF/SIF Signal-Processing Circuit
Block Diagram Block Diagram
The LA7567MB and LA7567BVA are PAL/NTSC multi-system VIF/SIF ICs that adopt a partially adjustment-free circuit structure.
The LA7567BMV is provided in an SSOP24 (225 mil, 0.5 mm lead pitch) package that is optimal for miniature 2-in-1 tuners.
The VIF block adopts a technique that makes AFT adjustment unnecessary by adjusting the VCO, thus simplifying the adjustment
process. PLL detection is adopted for FM detection to handle audio multipath detection. These ICs include a on-chip SIF converter,
making design of multi-system products easier. The supply voltage is the same 5 V used in multimedia systems. In addition, an
on-chip buzz canceller suppresses Nyquist buzz for superb audio quality.
These products provide improved video and audio signal-to-noise ratios and improved video signal amplitude as compared to the
LA7567N/NM.
VIF amplifier
PLL detector
BNC
RF AGC
Equalizer amplifier
AFT
IF AGC
Buzz canceller
First SIF
First SIF detector AGC
Multi SFI converter
Limiter amplifier
PLL FM detector
The AFT and SIF require no coils and are adjustment free
PAL/NTSC multiformat audio systems can be implemented easily
Built-in buzz canceller for excellent audio characteristics
VCC = 5 V, low-power operation
Packages: LA7567BM: MFP24S (300mil)
LA7567BVA: SSOP24 (225mil) Limiter amplifier
PLL FM detector
The AFT and SIF require no coils and are adjustment free
Built-in buzz canceller for excellent audio characteristics
VCC = 5 V, low-power operation
Packages: LA7576VA: SSOP24 (225mil)
LA7576V: SSOP24 (275mil) VIF amplifier
PLL detector
BNC
RF AGC
Equalizer amplifier
AFT
IF AGC
Buzz canceller
The LA7576V and LA7576VA are NTSC intercarrier VIF/SIF ICs that adopt a partially adjustment-free circuit structure.
The LA7567VA is provided in a SSOP24 (225 mil, 0.5 mm lead pitch) package that is optimal for miniature 2-in-1 tuners.
The VIF block adopts a technique that makes AFT adjustment unnecessary by adjusting the VCO, thus simplifying the adjustment
process. PLL detection is adopted for FM detection.
The supply voltage is the same 5 V used in multimedia systems. In addition, an on-chip buzz canceller suppresses Nyquist buzz for
superb audio quality.