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Número de pieza | LM1036 | |
Descripción | DUAL DC OPERATED TONE/VOLUME BALANCE CIRCUITS | |
Fabricantes | National Semiconductor | |
Logotipo | ||
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LM1036
Dual DC Operated Tone/Volume/Balance Circuit
General Description
The LM1036 is a DC controlled tone (bass/treble), volume
and balance circuit for stereo applications in car radio, TV
and audio systems. An additional control input allows loud-
ness compensation to be simply effected.
Four control inputs provide control of the bass, treble, bal-
ance and volume functions through application of DC volt-
ages from a remote control system or, alternatively, from four
potentiometers which may be biased from a zener regulated
supply provided on the circuit.
Each tone response is defined by a single capacitor chosen
to give the desired characteristic.
Features
n Wide supply voltage range, 9V to 16V
n Large volume control range, 75 dB typical
n Tone control, ±15 dB typical
n Channel separation, 75 dB typical
n Low distortion, 0.06% typical for an input level of 0.3
Vrms
n High signal to noise, 80 dB typical for an input level of
0.3 Vrms
n Few external components required
Block and Connection Diagram
Dual-In-Line Package
Order Number LM1036N
See NS Package Number N20A
DS005142-1
© 1999 National Semiconductor Corporation DS005142
www.national.com
1 page Application Circuit
Applications Information
OBTAINING MODIFIED RESPONSE CURVES
The LM1036 is a dual DC controlled bass, treble, balance
and volume integrated circuit ideal for stereo audio systems.
In the various applications where the LM1036 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 Ct must be in-
creased, and for increased bass range Cb must be reduced.
Figure 1 shows the typical tone response obtained in the
standard application circuit. (Ct=0.01 µF, Cb=0.39 µF). Re-
sponse curves are given for various amounts of boost and
cut.
DS005142-3
Figure 2 and Figure 3 show the effect of changing the re-
sponse defining capacitors Ct and Cb to 2Ct, Cb/2 and 4Ct,
Cb/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.
DS005142-5
FIGURE 2. Tone Characteristic (Gain vs Frequency)
DS005142-4
FIGURE 1. Tone Characteristic (Gain vs Frequency)
DS005142-6
FIGURE 3. Tone Characteristic (Gain vs Frequency)
5 www.national.com
5 Page |
Páginas | Total 10 Páginas | |
PDF Descargar | [ Datasheet LM1036.PDF ] |
Número de pieza | Descripción | Fabricantes |
LM1035 | DUAL DC OPERATED TONE/VOLUME BALANCE CIRCUITS | National Semiconductor |
LM1036 | DUAL DC OPERATED TONE/VOLUME BALANCE CIRCUITS | National Semiconductor |
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