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PDF HA12206NT Data sheet ( Hoja de datos )
| Número de pieza | HA12206NT | |
| Descripción | Audio Signal Processor for Cassette Deck | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HA12206NT
Audio Signal Processor for Cassette Deck
ADE-207-198B (Z)
3rd Edition
Jun. 1999
Description
HA12206NT is silicon monolithic bipolar IC providing music sensor system, ALC, REC equalizer system
and each electronic control switch in one chip.
Functions
• REC equalizer × 2 channel
• Line Amp.
× 2 channel
• ALC (Automatic Level Control)
• MS (Music Sensor)
• Each electronic control switch to change REC equalizer, bias, etc.
• REC mute
Features
• REC equalizer is very small number of external parts, built-in 2 types of frequency characteristics.
• Correspondence with normal position (TYPE I) / high position (TYPE II).
• TYPE I / TYPE II and PB equalizer fully electronic control switching built-in.
• Controllable from direct micro-computer output.
• Available to reduce substrate-area because of high integration and small external parts.
1 page  
Block Diagram
HA12206NT
Rev.3, Jun. 1999, page 5 of 32
5 Page 
HA12206NT
PB Equalizer
By switching logical input level of pin17 (for Ain) or pin18 (for Bin), you can equalize corresponding to
tape position at play back mode.
Frequency characteristics of high position (TYPE II) depends on capacitor C1 on the block diagram figure.
Figure 1 is shown by a motive of the NAB standard.
GV
τ1 = C1 • (10.6k+14.9k)
τ2 = C1 • 14.9k
τ1 τ2
f
Figure 1 Frequency Characteristics of PB Equalizer
Music Sensor
VCC
to ALC
0.33µ
330k
13
100k
C4 L
23
C4 R
8
100k
100k
100k
100k
43p
+
–
100k
MS
DET
D VCC
(5V)
22k
16
to ALC
LR addend stage
12
Detection stage Output stage
R5 68k
C5 2200p
Amplification stage
Figure 2 Music Sensor Block Diagram
Rev.3, Jun. 1999, page 11 of 32
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HA12206NT.PDF ] | |
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