參數(shù)資料
型號: MC1311
廠商: Motorola, Inc.
英文描述: UNIVERSAL NARROWBAND FM RECEIVER INTEGRATED CIRCUIT
中文描述: 通用窄帶調(diào)頻接收器集成電路
文件頁數(shù): 29/68頁
文件大?。?/td> 1316K
代理商: MC1311
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
D
Toko 7MCS–8128Z
Figure 53. Typical Limiter Output
Waveform with Quadrature Coil
800
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
1.6
440
442
444
446
448
460
Lim In, INPUT FREQUENCY (kHz)
1.4
1.5
450
452
454
456
458
D
Murata CDBM450C48
Figure 55. Typical Limiter Output
Waveform with Ceramic Resonator
800
A
f = 455 kHz
Vpptyp = 344 mV
0
1.0
t, TIME (ms)
600
400
200
A
f = 450 kHz
Vpptyp = 370 mV
0
1.0
t, TIME (ms)
600
400
200
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MC13110 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:UNIVERSAL NARROWBAND FM RECEIVER INTEGRATED CIRCUIT
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MC13110AFB 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:UNIVERSAL CORDLESS TELEPHONE SUBSYSTEM IC
MC13110AFTA 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:UNIVERSAL NARROWBAND FM RECEIVER INTEGRATED CIRCUIT
MC13110BFB 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:UNIVERSAL NARROWBAND FM RECEIVER INTEGRATED CIRCUIT