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LM1036N Datasheet(PDF) 5 Page - National Semiconductor (TI) |
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LM1036N Datasheet(HTML) 5 Page - National Semiconductor (TI) |
5 / 10 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 C t 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 t=0.01 µF, Cb=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 t and Cb to 2Ct, Cb/2 and 4Ct, C b/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. DS005142-3 DS005142-4 FIGURE 1. Tone Characteristic (Gain vs Frequency) DS005142-5 FIGURE 2. Tone Characteristic (Gain vs Frequency) DS005142-6 FIGURE 3. Tone Characteristic (Gain vs Frequency) www.national.com 5 |
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