Practical tones preamp circuit diagram

Published:2014/1/16 21:52:00 Author: | Keyword: Practical tones preamp circuit diagram, LM1036 | From:SeekIC

The core parts of the circuit by a dc tone control IC, a NPN transistor, and four resistors common enough. Other components are used in the dc tone control IC itself needs to peripheral components. Most dc tone control IC has himself to dc tone control circuit provides a reference level (mostly + 5 v), but mu PC1892 dc tone control IC, such as exception, must by external with + 5 v dc reference level. Figure 1 for this function circuit schematic diagram, figure 2 as an example. Component parameter setting: as high and low adjusting potentiometer RW1 is in not ascend, BG1 should be ended, no influence of volume at this time. As high and low adjusting potentiometer RW1 from start to ascend, and finally achieve maximum lifting capacity + 12 db, BG1 by the globe into linear workspace, and then further into conducting state completely, leading to add on the volume potentiometer dc level to reduce the dc tone control IC output signal amplitude attenuation 12 db accordingly. Therefore, the circuit of R3, R4, R5 three selected tones of dc resistance and the associated control IC internal parameters. For example chooses dc tone control IC for the NS company LM1036 or LM1046 model, its resistance respectively choose = 22 k Ω R3 and R4 Ω Ω, R5 = 36 k = 5.6 k. As shown practical tones preamp circuit diagram



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