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參數(shù)資料
| 型號： | HA12155 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Audio Signal Processor for Cassette Deck (Dolby B/C-type NR with Recording System) |
| 中文描述： | 音頻信號處理器（杜比B / C型與錄音系統(tǒng)星期日的盒式收錄機） |
| 文件頁數(shù)： | 19/57頁 |
| 文件大?。?/td> | 463K |
| 代理商： | HA12155 |
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HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 19 of 57
MPX ON/OFF Switch
MPX-OFF mode means that signal from input amp doesn’t go through the MPX filter, but signal goes
through the SS circuit after being attenuated 3 dB by internal resistor. Refer to figure 5. For not cause any
level difference between MPX-ON mode and MPX-OFF mode, it is requested to use MPX-filter which has
definitely 3 dB attenuated. MPX-OFF mode offer totally flat frequency response and no bias-trap effect.
And when applying other usage except figure 5, take consideration to give bias voltage to NR-IN terminal
by resistor or so on because internal of NR-IN terminal hsa no bias resistor.
5.6 k
MPX
2.4 k
Vref
INPUT amp
MPX ON
MPX OFF
NR
PROCESSER
Vref
3 dB ATT.
IA OUT
NR IN
VREF
+
–
+
–
Figure 5 MPX ON/OFF Switch Block Diagram
Application as for the Dubbing Cassette Deck
HA12155NT/HA12157NT series has unprocessor signal from recording out terminals during plyaback
mode. So, it is simply applied for dubbing cassette decks.
And HA12155NT/HA12157NT has three input terminal. So, it is applicable to switch the signal from PB-
EQ as shown below.
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PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HA12155NT | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Audio Signal Processor for Cassette Deck (Dolby B/C-type NR with Recording System) |
| HA12155NT/HA12157NT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| HA12157NT | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Audio Signal Processor for Cassette Deck (Dolby B/C-type NR with Recording System) |
| HA12159 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FM Receiver Circuit |
| HA12160 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Audio Signal Processor for Car Deck and Cassette Deck (Dolby B-type NR with PB Amp) |
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