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MC1496, MC1496B
be introduced with or without modulation, provided its level
is sufficiently high to saturate the upper quad differential
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 29 shows a mixer with a broadband input and a
tuned output.
Frequency Doubler
The MC1496 will operate as a frequency doubler by
Figures 30 and 31 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.
introducing the same frequency at both input ports.
TYPICAL APPLICATIONS
1.0 k
820
1.3 k
V CC
12 Vdc
25 m F
0.1 m F
Null 50 k
2
50 k
0.1 m F
+
15 V
Carrier Input
60 mVrms
Modulating ? +
Signal Input 10 m F
300 mVrms 15 V
Carrier
10 k 10 k
51
100
1.0 k
8
10
1 MC1496
4
25 m F 14
15 V
+ ?
100
3
5
3.0 k
6
12
10 k
3.0 k
DSB
0.1 m F Output
1.0 k
51
V C 0.1 m F
Carrier
Input
V S
Modulating
Signal 10 k 10 k
Input
R1
Carrier Null
51
1.0 k
0.1 m F 2
8
10
1
4
51 14
R e 1.0 k
MC1496
I5
V EE
?8.0 Vdc
R L
3 3.9 k
6
12
5
6.8 k
V CC
12 Vd
R L
3.9
+
?
Figure 25. Balanced Modulator
(12 Vdc Single Supply)
Figure 26. Balanced Modulator ? Demodulator
V C 0.1 m F
MC1496
1
V EE
?8.0 Vdc
R L
0.1 m F
2
0.1
Carrier
Input V S 4
Input 50 k
1.0 k 1.0 k
Signal 750 750 51 51 14 5
Carrier Adjust
R L
51 0.1 m F 2 R e 1.0 k 3 3.9 k
8
10 6
Modulating 12
15 6.8 k
V CC
12 Vdc
1.0 k
3.9 k
+V o Carrier Input
300 mVrms
SSB Input
?V o
820
51
0.1 m F
1.0 k
1.0 k
1.3 k
0.1 m F
100
3
8
10
1 MC1496
4
14 5
m F
3.0 k
6
12
10 k
V CC
12 Vdc
3.0 k
0.005
m F AF
1.0 k 1.0 m F Outp
R L q 10
0.005 0.005
m F m F
Figure 27. AM Modulator Circuit
http://onsemi.com
10
Figure 28. Product Detector
(12 Vdc Single Supply)
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