FIGURE 15-1 Low-pass filter responses.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-2 High-pass filter responses.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-3 General band-pass response curve.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-4 General band-stop filter response.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-5 Comparative plots of three types of filter response characteristics.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-6 General diagram of an active filter.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-7 First-order (one-pole) low-pass filter.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-8 The number of filter poles can be increased by cascading.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-9 Single-pole active low-pass filter and response curve.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-10 Basic Sallen-Key second-order low-pass filter.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-11Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-12 Cascaded low-pass filters.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-13 Single-pole active high-pass filter and response curve.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-14 High-pass filter response.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-15 Basic Sallen-Key second-order high-pass filter.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-16 Sixth-order high-pass filter.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-17 Band-pass filter formed by cascading a two-pole high-pass and a two-pole low-pass filter (it does not matter in which order the filters are cascaded).Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-18 Multiple-feedback band-pass filter.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-19Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-20 State-variable band-pass filter.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-21 General state-variable response curves. BP is for band-pass.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-22Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-23 Multiple-feedback band-stop filter.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-24 State-variable band-stop filter.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-25Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-26 Test setup for discrete point measurement of the filter response. (Readings are arbitrary and for display only.)Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-27 Test setup for swept frequency measurement of the filter response.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-28 Basic block diagram of an FM receiver system.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-29 Channel filter board.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-30 Channel separation circuits. The circuits on the filter board are shown in the green blocks.Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-31Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-32 File circuits are identified with a CD logo and are in the Problems folder on your CD-ROM. Filenames correspond to figure numbers (e.g., F15-32).Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-33Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-34Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-35Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-36Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.

FIGURE 15-37Thomas L. FloydElectronic Devices, 6e and Electronic Devices: Electron Flow Version, 4eCopyright 2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458All rights reserved.