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參數資料
| 型號： | TEA6320T-T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), SOUND FADER CONTROL CIRCUIT, PDSO32 |
| 文件頁數： | 22/40頁 |
| 文件大?。?/td> | 188K |
| 代理商： | TEA6320T-T |
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1995 Dec 19
29
Philips Semiconductors
Preliminary specication
Sound fader control circuit
TEA6320
Loudness lter calculation example
Figure 17 shows the basic loudness circuit with an
external low-pass filter application. R1 allows an
attenuation range of 21 dB while the boost is determined
by the gain stage V2. Both result in a loudness control
range of +20 to
12 dB.
Defining fref as the frequency where the level does not
change while switching loudness on/off. The external
resistor R3 for fref →∞ can be calculated as:
. With Gv = 21 dB and R1 = 33 k,
R3 = 3.2 k
is generated.
For the low-pass filter characteristic the value of the
external capacitor C1 can be determined by setting a
specific boost for a defined frequency and referring the
gain to Gv at fref as indicated above.
For example: 3 dB boost at f = 1 kHz
Gv =Gv(ref) + 3 dB = 18 dB; f = 1 kHz and C1 = 100 nF.
If a loudness characteristic with additional high frequency
boost is desired, an additional high-pass section has to be
included in the external filter circuit as indicated in the
block diagram. A filter configuration that provides
AC coupling avoids offset voltage problems.
R3
R1
10
G
v
20
-------
110
G
v
20
-------
–
---------------------
=
1
j
ωC1
()
---------------------
R1
R3
+
() 10
G
v
20
-------
R3
–
×
110
G
v
20
-------
–
--------------------------------------------------------------
=
Fig.17 Basic loudness circuit.
handbook, halfpage
MED437
V1
V2
R1
R3
C1
CKVL
R2
0 dB
33 k
8
9
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TEA6321 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Sound fader control circuit |
| TEA6321T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Sound fader control circuit |
| TEA6321T/V1 | 功能描述:音頻 DSP AUDIO POWER RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TEA6321T/V1,512 | 功能描述:音頻 DSP AUDIO POWER RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TEA6321T/V1,518 | 功能描述:音頻 DSP AUDIO POWER RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
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