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MC13110A Datasheet(PDF) 29 Page - Motorola, Inc |
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MC13110A Datasheet(HTML) 29 Page - Motorola, Inc |
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29 / 68 page  MC13110A/B MC13111A/B 29 MOTOROLA ANALOG IC DEVICE DATA Figure 51. Ceramic Resonator Demodulator Schematic with Murata CDBM450C48 C28 390 p Rext 2.7 k Ceramic Resonator Murata CDBM450C34 Lim Out1 Q Coil (CDBM455C48 US; CDBM450C48 France) The “S–curve” for the ceramic discriminator shown in Figure 54 is centered around 450 kHz. It is for the French application. The same resonator is also used for the US application and is centered around 455 kHz. Clearly, the “S–curves” for the resonator and quad coil have very similar limiter outputs. As discussed previously, the slope of the “S–curve” centered around the center frequency can be controlled by the parallel resistor, Rext. Distortion, bandwidth, and audio output level will be affected. Figure 52. S–Curve of Limiter Discriminator with Quadrature Coil 0.2 0.6 1.0 1.4 2.2 425 435 445 485 Lim In, INPUT FREQUENCY (kHz) 1.8 455 465 475 Toko 7MCS–8128Z Figure 53. Typical Limiter Output Waveform with Quadrature Coil IF LIMITER AND DEMODULATION Figure 54. S–Curve of Limiter Discriminator with Ceramic Resonator 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.7 440 442 444 446 448 460 Lim In, INPUT FREQUENCY (kHz) 1.4 1.5 450 452 454 456 458 Murata CDBM450C48 1.6 Figure 55. Typical Limiter Output Waveform with Ceramic Resonator f = 455 kHz Vpptyp = 344 mV 0 1.0 t, TIME (ms) 600 400 200 800 f = 450 kHz Vpptyp = 370 mV 0 1.0 t, TIME (ms) 600 400 200 800 |
Similar Part No. - MC13110A |
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Similar Description - MC13110A |
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