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PDF MC13020 Data sheet ( Hoja de datos )
| Número de pieza | MC13020 | |
| Descripción | AM STEREO DECODER | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Order this document by MC13020/D
MC13020
Motorola C-QUAM®
AM Stereo Decoder
This circuit is a complete one ship, full feature AM stereo decoding and
pilot detection system. It employs full–wave envelope signal detection at all
times for the L + R signal, and decodes L – R signals only in the presence of
valid stereo transmission.
• No Adjustments, No Coils
• Few Peripheral Components
• True Full–Wave Envelope Detection for L + R
• PLL Detection for L – R
• 25 Hz Pilot Presence Required to Receive L – R
• Pilot Acquisition Time 300 ms for Strong Signals, Time Extended for
Noise Conditions to Prevent “Falsing”
• Internal Level Detector can be used as AGC Source
MOTOROLA C–QUAM®
AM STEREO DECODER
SEMICONDUCTOR
TECHNICAL DATA
20
1
P SUFFIX
PLASTIC PACKAGE
CASE 738
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC13020P TA = – 40 to +85°C Plastic DIP
+8.0Vdc
Figure 1. Simplified Application
0.0033
0.0033
0.0033
220
IF Input
Optional Tuner
AGC Source
0.01
+
10µF
0.001
1 l Detector
2 Envelope
Detector
3 IF Input
4 Level
Detector
5 Error
Amplifier
6 VCC
Q Detector
Phase Detector
Osc. Feedback
Osc. Input
Ground
Stereo Lamp
Pilot Detector
Input
20
19
18
17
51pF
16
47µF
+
430
3.3k
0.01
15
14 +
0.47
0.0033
Audio
Outputs
Auto Monaural
7 Left Output
8 Right Output
100k
9 Forced
Monaural
Pilot Filter
Input
Co–Channel
Input
220k
13 +
4.7k
56k 0.47 910
12 1.5k + 1.5k
10µF
+
2.2µF
10 Lock
+
2.2µF
AGC’d Q 11
Output
430
+
4.7µF
*muRata Ceramic Resonator – CSA3.60MGF101
LED
Stereo
Indicator
The purchase of the Motorola C–QUAM® AM Stereo Decoder does not carry with such purchase any license by implication, estoppel or otherwise,
under any patent rights of Motorola or others covering any combination of this decoder with other elements including use in a radio receiver. Upon
application by an interested party, licenses are available from Motorola on its patents applicable to AM Stereo radio receivers.
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1995
1
1 page  
MC13020
Figure 5. Ceramic VCO
5.0
20 19 18 17
+
4.5 47µF
muRata
CSA3.60MGF101
430 0.0033
4.0
Rd
Cs
3.5
RCds
=
=
51 pF
3.3 k
RCds
=
=
45 pF
3.3 k
3.0
446 447
RCds
=
=
51
8
pF
448 449 450 451 452
VCO 8 FREQUENCY (kHz)
453 454
Figure 6. L–C VCO
5.5
20 19 18 17
5.0 +
33µF
100
15.5
µF
4.5 560
0.0033 30 220
4.0
3.5
3.0
446 447 448 449 450 451 452 453 454
VCO 8 FREQUENCY (kHz)
Figure 7. Crystal VCO
5.5
20 19 18 17
5.0 +
2.2µF
3.6
MHz
4.5
20k 0.1µF 1.2k
24
4.0
3.5
3.0
449.90
449.95
450.00
450.05
VCO 8 FREQUENCY (kHz)
450.10
Figure 8. Forced Monaural
Optional Delay Circuit
TTL 470k
Bus
9
MC13020
10k
1.0µF +
C Rc
Vin Ra
Rb C
–
+
VRef
Figure 9. Active Bandpass Filter
Rc
=
π
Q
fO
C
Vout
Ra
= Rc
2 Ao
Rb
=
Ra Rc
4Q2Ra–Rc
C ± 5%
0.47 µF
Ra ± 5%
4.7 k
Rb ± 1%
910
Rc ± 1%
220 k
0.33 µF
8.2 k
1.3 k
330 k
NOTE: Capacitor C should be a good grade, low ESR.
Where in this application: fO = center frequency = 25 Hz
Where in this application: Ao = gain at fO ≤ 25
Where in this application: Q ≤ 10
Choose values for fO, Ao, Q, and convenient C, solve for resistors.
MOTOROLA ANALOG IC DEVICE DATA
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet MC13020.PDF ] | |
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