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參數(shù)資料
| 型號(hào)： | LM4610 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Dual DC Operated Tone/Volume/Balance Circuit with National 3-D Sound |
| 中文描述： | 雙區(qū)運(yùn)營(yíng)音/音量/平衡電路與全國(guó)3 - D音效 |
| 文件頁(yè)數(shù)： | 5/11頁(yè) |
| 文件大小： | 393K |
| 代理商： | LM4610 |
Application Notes
(Continued)
may be used provided the output level does not exceed
1 Vrms, V
=12V (0.7 Vrms, V
=9V). At reduced gain
(
<
6 dB)the input stage will overload if the input level ex-
ceeds 1.6 Vrms, V
CC
=12V (1.1 Vrms, V
CC
=9V). As there is
Application Circuit
volume control on the input stages, the inputs may be oper-
ated with a lower overload margin than would otherwise be
acceptable, allowing a possible improvement in signal to
noise ratio.
Applications Information
OBTAINING MODIFIED RESPONSE CURVES
The LM4610 is a dual DC controlled bass, treble, balance
and volume integrated circuit ideal for stereo audio systems.
In the various applications where the LM4610 can be used,
there may be requirements for responses different to those
of the standard application circuit given in the data sheet.
This application section details some of the simple variations
possible on the standard responses, to assist the choice of
optimum characteristics for particular applications.
TONE CONTROLS
Summarizing the relationship given in the data sheet, basi-
cally for an increase in the treble control range C
must be in-
creased, and for increased bass range C
b
must be reduced.
Figure 1 shows the typical tone response obtained in the
standard application circuit. (C
=0.01 μF, C
=0.39 μF). Re-
sponse curves are given for various amounts of boost and
cut.
Figure 2 and Figure 3 show the effect of changing the re-
sponse defining capacitors C
and C
to 2Ct, C
/2 and 4C
t
,
C
/4 respectively, giving increased tone control ranges. The
values of the bypass capacitors may become significant and
affect the lower frequencies in the bass response curves.
DS101125-35
DS101125-4
FIGURE 1. Tone Characteristic (Gain vs Frequency)
www.national.com
5
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| LM4610N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual DC Operated Tone/Volume/Balance Circuit with National 3-D Sound |
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