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參數(shù)資料
| 型號(hào)： | HA12177 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Audio Signal Processor for Car Deck and Cassette Deck (Dolby B/C-type NR with PB Amp) |
| 中文描述： | 音頻信號(hào)處理器（杜比B / C型與鉛放大器為汽車甲板上午和卡座） |
| 文件頁(yè)數(shù)： | 14/66頁(yè) |
| 文件大?。?/td> | 1116K |
| 代理商： | HA12177 |
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HA12173 Series
Rev.1, Nov. 1992, page 14 of 66
Input Block Diagram and Level Diagram
0.1
μ
C24
30 mVrms
(
–
28.2 dBs)
F
V
R
NFI
EQ AMP
EQ OUT-M
EQ OUT
R35
5.1 k
R36
12 k
R37
18 k
C25
0.01
μ
R39
180
R38
330 k
R34
5.1 k
RAI
TAI
PBOUT
NR circuit
INPUT AMP
42.4 mVrms
(
–
25.2 dBs)
+
–
+
–
RECOUT
300 mVrms
(
–
8.2 dBs)
0.6 mVrms
(
–
62.2 dBs)
IN
REF
IN
Unit R:
C: F
HA12173: 300 mVrms (
–
8.2 dBs)
HA12174: 450 mVrms (
–
4.7 dBs)
HA12175: 580 mVrms (
–
2.5 dBs)
HA12177: 775 mVrms (0.0 dBs)
The each level shown above is typical value
when offering PBOUT level to PBOUT pin.
(EQ AMP Gv = 40 dB f = 1 kHz)
Figure 2 Input Block Diagram
Adjustment of Playback Dolby Level
After replace R34 and R35 with a half-fix volume of 10 k
, adjust RECOUT level to be Dolby level with
playback mode.
Note on Connecting with Tape Head to IC
This IC has no internal resistor to give the DC bias current to equalizer amp., therefore the DC bias current
will give through the head. This IC provides the Vref buffer output pin for Rch and Lch separately (has
two Vref terminal). In case of use that the Rch and Lch reference of head are connected commonly, please
use one of Vref terminals of IC (47 pin or 52 pin) for head reference. If both 47 pin and 52 pin of IC are
connected, rush current give the great damage to IC. The application circuit is shown in figure 3.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HA12179F | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Audio Signal Processer for Car Deck and Cassette Deck(Dolby B-type NR with PB Amp) |
| HA12181FP | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:AM Radio Noise Reduction System |
| HA12187 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Bus Interface Driver/Receiver IC |
| HA12187DP-EL-E | 制造商:Renesas Electronics Corporation 功能描述:MCU - Trays |
| HA12187FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Bus Interface Driver/Receiver IC |
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