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FIGURE 8-1 Double-conversion FM receiver block diagram
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-2 Slope detector: (a) schematic diagram; (b) voltage-versus-frequency curve
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-3 Balanced slope detector: (a) schematic diagram; (b) voltage-versus-frequency response curve
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-4 Foster-Seely discriminator: (a) schematic diagram; (b) vector diagram, fin = fo; (c) vector diagram, fin > fo; (d) vector diagram, fin < fo
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-5 Discriminator voltage-versus-frequency response curve
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-6 Ratio detector: (a) schematic diagram; (b) voltage-versus-frequency response curve
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-7 (a) Block diagram for a PLL FM demodulator; (b) PLL FM demodulator using the XR-2212 PLL
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-8 Quadrature FM demodulator
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-9 Amplitude limiter input and output waveforms: (a) input waveform; (b) output waveform
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-10 Limiter output: (a) captured by noise; (b) captured by signal
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-11 FM thresholding
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-12 Single-stage tuned limiter: (a) schematic diagram; (b) limiter action
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-13 Filtered limiter output
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-14 Three-stage cascaded limiter
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-15 Limiter response curves
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-16 Block diagram for the Signetics NE/SA614A integrated-circuit, low-power FM IF system
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-17 Equivalent circuit for the Signetics NE/SA614A integrated-circuit, low-power FM IF system
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-18 Quadrature detector block diagram
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-19 Block diagram for the Signetics NE/SA616 monolithic FM IF system
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-20 Block diagram for the Signetics TDA7000 integrated-circuit FM radio
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-21 FM baseband spectrum: (a) prior to 1955; (b) prior to 1961; (c) since 1961
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-22 Stereo FM transmitter using frequency-division multiplexing
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
TABLE 8-1 Composite FM Voltages
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-23 Development of the composite stereo signal for equal-amplitude L and R signals: (a) L audio signal; (b) R audio signal; (c) L + R stereo channel; (d) L - R stereo channel; (e) SCA + 19-kHz pilot; (f) composite baseband waveform
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-24 Development of the composite stereo signal for unequal-amplitude L and R signals: (a) L audio signal; (b) R audio signal; (c) L + R stereo channel; (d) L - R stereo channel; (e) SCA + 19-kHz pilot; (f) composite baseband waveform
FIGURE 8-25 FM stereo and mono receiver
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-26 Stereo matrix network decoder
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-27 XR-1310 stereo demodulator
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-27 (Continued) XR-1310 stereo demodulator
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-28 Two-way FM transmitter block diagram
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-29 Electronic PTT schematic diagram
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-30 VOX schematic diagram
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
FIGURE 8-31 Two-way FM receiver block diagram
TomasiElectronic Communications Systems, 5e
Copyright ©2004 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.