參數(shù)資料
型號： HA12170NT
廠商： Hitachi,Ltd.
英文描述： Dolby B- and C-Type Noise Reduction System
中文描述： 杜比B和C型降噪系統(tǒng)
文件頁數(shù)： 58/63頁
文件大小： 392K
代理商： HA12170NT
HA12141NT, HA12142NT, HA12170NT, HA12161FP, HA12162FP
Rev.3, Jun. 1999, page 58 of 63
Operation Mode Control
HA12141 series provide fully electronic switching circuits. The function are controlled by DC voltage and
are NR OFF/B/C and PB/REC/MPX.
The switching truth tables are shown in table 2 and table 3.
Table 2 Switching Truth Table (NR OFF/B/C)
Function
Single supply
Split supply
Unit
Note
NR OFF
0 to V
CC
/2 – 3
V
CC
/2 – 0.5 to V
CC
/2 + 0.5
V
CC
/2 + 3 to V
CC
V
EE
to –3
–0.5 to 0.5
V
B type
V
*1
C type
Note:
3 to V
CC
V
1. These functions are available for being open at NR B mode and REC mode
Table 3 Switching Truth Table (PB/REC/MPX)
Function
Single supply
Split supply
Unit
Note
Play back (Decode mode)
0 to 0.4
V
EE
to V
EE
+ 0.4
V
EE
+ 2.5 to 0.5
V
CC
– 1 to V
CC
V
Record (Encode mode)
2.5 to V
CC
/2 + 0.5
V
CC
– 1 to V
CC
V
*1
MPX-OFF
Notes: 1. These functions are available for being open at NR B mode and REC mode.
2. MPX-OFF mode control Voltage of HA12170NT is available with range from V
CC
– 2 to V
CC
.
V
*2
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 2.
相關(guān)PDF資料
PDF描述
HA12141 Dolby B- and C-Type Noise Reduction System
HA12173 Audio Signal Processor for Car Deck and Cassette Deck (Dolby B/C-type NR with PB Amp)
HA12174 Audio Signal Processor for Car Deck and Cassette Deck (Dolby B/C-type NR with PB Amp)
HA12175 Audio Signal Processor for Car Deck and Cassette Deck (Dolby B/C-type NR with PB Amp)
HA12177 Audio Signal Processor for Car Deck and Cassette Deck (Dolby B/C-type NR with PB Amp)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HA12173 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/C-type NR with PB Amp)
HA12173SERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
HA12174 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/C-type NR with PB Amp)
HA12175 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/C-type NR with PB Amp)
HA12177 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/C-type NR with PB Amp)
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