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Schematic and PCB Layout
7
SBOU191 – July 2017
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Copyright © 2017, Texas Instruments Incorporated
DIYAMP-SOT23-EVM
3
Schematic and PCB Layout
This section provides the schematic and PCB layout of each circuit configuration provided on the EVM.
3.1
Schematic PCB Drawing
Each circuit board has a silk screen of its schematic for easy reference.
Figure 8. Silk Screen Circuit Schematic
3.2
Single-Supply, Multiple Feedback Filter
Figure 9
shows the schematic for the single-supply, multiple feedback (MFB) filter circuit configuration.
Figure 9. Single-Supply, Multiple Feedback Filter Schematic
The MFB topology (sometimes called infinite gain or Rauch) is often preferred, due to low sensitivity to
component variations. The MFB topology creates an inverting second-order stage. This inversion may, or
may not, be a concern in the filter application.