參數(shù)資料
型號(hào)： HA12217F
廠商： Hitachi,Ltd.
英文描述： Audio Signal Processor for Car Deck(Decode only Dolby B type NR with PB Amp.)
中文描述： 音頻信號(hào)處理器。為汽車甲板（解碼杜比乙只用PB安培型降噪）
文件頁(yè)數(shù)： 12/53頁(yè)
文件大?。?/td> 343K
代理商： HA12217F
HA12216F/HA12221F Series
Rev.6, Dec. 2000, page 12 of 53
1. Serch mode
G
V1
= 20dB + 20log 1 +
[dB]
90k
REX2
f
1
=
[Hz], f
2
= 25k [Hz]
1
2
π
CEX2
REX2
2. Repeat mode
G
V2
= 20dB + 20log 1 +
[dB]
90k
REX1
f
3
=
[Hz], f
4
= 25k [Hz]
1
2
π
CEX1
REX1
G
V
IA: L·R signal addition circuit gain.
The sensitivity of music sensor (S) is computed by the formula mentioned below.
S =
G
V
*
1
20log
= 12.7
G
V
[dB]
130*
3
30*
2
Note: 1. Search mode: G
V1
, Repeat mode: G
V2
2. Standard level of TAI pin (Dolby level correspondence) = 30 mVrms
3. Standard sensing level of music sensor = 130 mVrms
Item
REX1, 2
CEX1, 2
G
V1, 2
33.5 dB
f
1, 3
663 Hz
f
2, 4
25 kHz
S
(one side
channel)
S
(both
channel)
Search mode
24 k
2.4 k
0.01
μ
F
1
μ
F
–
14.8 dB
–
20.8 dB
Repeat mode
Note:
51.7 dB
66.3 Hz
25 kHz
–
33.0 dB
–
39.0 dB
S is 6 dB down in case of one-side channel. And this MS presented hysteresis lest MSOUT terminal
should turn over again Hi level or Lo level, in case of thresh S level constantly.
Music Sensor Time Constant
1. Sensing no signal to signal (Attack) is determined by C6, 0.01
μ
F to 1
μ
F capacitor C6 can be
applicable.
2. Sensing signal to no signal (Recovery) is determined by C6 and R11, however preceding (1), 100 k
to
1 M
can be applicable.
Music Sensor Output (MSOUT)
As for the internal circuit of music sensor block, music sensor output pin is connected to the collector of
NPN type directly, therefore, output level will be “high” when sensing no signal. And output level will
be “l(fā)ow” when sensing signal.
I
L
=
* MSOUT
LO
: Sensing signal (about 1V)
DV
CC
MSOUT
LO
*
R
L
Note: 1. Supply voltage of MSOUT pin must be less than V
CC
voltage.
相關(guān)PDF資料
PDF描述
HA12216F Audio Signal Processor for Car Deck(Decode only Dolby B type NR with PB Amp.)
HA12218F Audio Signal Processor for Car Deck(Decode only Dolby B type NR with PB Amp.)
HA12221F Audio Signal Processor for Car Deck(Decode only Dolby B type NR with PB Amp.)
HA12222F Audio Signal Processor for Car Deck(Decode only Dolby B type NR with PB Amp.)
HA12223F Audio Signal Processor for Car Deck(Decode only Dolby B type NR with PB Amp.)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HA12218F 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Audio Signal Processor for Car Deck (Decode only Dolby B type NR with PB Amp.)
HA12219 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Audio Signal Processor for Cassette Deck
HA12219NT 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Audio Signal Processor for Cassette Deck
HA12220 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CD-ROM Drive Head Amplifier IC
HA12220F 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CD-ROM Drive Head Amplifier IC
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