MC1496D 데이터 시트보기 (PDF) - Motorola => Freescale
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MC1496D Datasheet PDF : 12 Pages
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MC1496, B
amplifier. If the carrier signal is modulated, a 300 mVrms
input level is recommended.
Doubly Balanced Mixer
The MC1496 may be used as a doubly balanced mixer
with either broadband or tuned narrow band input and output
networks.
The local oscillator signal is introduced at the carrier input
port with a recommended amplitude of 100 mVrms.
Figure 30 shows a mixer with a broadband input and a
tuned output.
Frequency Doubler
The MC1496 will operate as a frequency doubler by
introducing the same frequency at both input ports.
Figures 31 and 32 show a broadband frequency doubler
and a tuned output very high frequency (VHF) doubler,
respectively.
Phase Detection and FM Detection
The MC1496 will function as a phase detector. High–level
input signals are introduced at both inputs. When both inputs
are at the same frequency the MC1496 will deliver an output
which is a function of the phase difference between the two
input signals.
An FM detector may be constructed by using the phase
detector principle. A tuned circuit is added at one of the inputs
to cause the two input signals to vary in phase as a function
of frequency. The MC1496 will then provide an output which
is a function of the input signal frequency.
TYPICAL APPLICATIONS
Figure 26. Balanced Modulator
(12 Vdc Single Supply)
Figure 27. Balanced Modulator–Demodulator
1.0 k
820
VCC
1.3 k
12 Vdc
1.0 k
1.0 k
25 µF+
Carrier Input 15 V
60 mVrms
0.1 µF
51
0.1 µF
Modulating – +
Signal Input 10 µF
300 mVrms 15 V
Carrier
Null 50 k
10 k 10 k
100
2 1.0 k
3.0 k
3
8
10
6
1 MC1496
4
3.0 k
51
DSB
VC 0.1 µF
0.1 µF Output
Carrier
Input
VS
Modulating
25 µF 14 5 12
Signal 10 k 10 k
Input
50 k
+15 V–
10 k
R1
Carrier Null
100
0.1 µF 2
8
10
1
4
Re 1.0 k
MC1496
51 51 14
I5
VEE
–8.0 Vdc
RL
3 3.9 k
6
12
5
6.8 k
VCC
12 Vdc
RL
3.9 k
+Vo
–Vo
Figure 28. AM Modulator Circuit
1.0 k
1.0 k
51
VC 0.1 µF
Carrier
Input VS
Modulating
Signal 750 750
Input
50 k
0.1 µF 2
8
10
1
4
51 51 14
Carrier Adjust
Re 1.0 k
MC1496
15
VEE
–8.0 Vdc
RL
3 3.9 k
6
12
5
6.8 k
VCC
12 Vdc
RL
1.0 k
3.9 k
+Vo Carrier Input
300 mVrms
SSB Input
–Vo
Figure 29. Product Detector
(12 Vdc Single Supply)
820
1.3 k
0.1 µF
51 8
0.1 µF
10
2 100 3 3.0 k
6
1 MC1496
0.1 µF 1.0 k 4
1.0 k
0.1 14
µF
5 12
10 k
VCC
12 Vdc
3.0 k
0.005
µF
1.0 k
1.0 µFOuAtFput
q RL 10 k
0.005 0.005
µF µF
MOTOROLA ANALOG IC DEVICE DATA
9
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