MC1496P 데이터 시트보기 (PDF) - Motorola => Freescale
부품명
상세내역
제조사
MC1496P Datasheet PDF : 12 Pages
| |||
MC1496, B
Coupling and Bypass Capacitors
Capacitors C1 and C2 (Figure 5) should be selected for a
reactance of less than 5.0 Ω at the carrier frequency.
Output Signal
The output signal is taken from Pins 6 and 12 either
balanced or single–ended. Figure 11 shows the output levels
of each of the two output sidebands resulting from variations
in both the carrier and modulating signal inputs with a
single–ended output connection.
Negative Supply
VEE should be dc only. The insertion of an RF choke in
series with VEE can enhance the stability of the internal
current sources.
Signal Port Stability
Under certain values of driving source impedance,
oscillation may occur. In this event, an RC suppression
network should be connected directly to each input using
short leads. This will reduce the Q of the source–tuned
circuits that cause the oscillation.
Signal Input
(Pins 1 and 4)
510
10 pF
An alternate method for low–frequency applications is to
insert a 1.0 kΩ resistor in series with the input (Pins 1, 4). In
this case input current drift may cause serious degradation of
carrier suppression.
TEST CIRCUITS
Figure 5. Carrier Rejection and Suppression
VCC
12 Vdc
1.0 k
1.0 k
Carrier
Input
C2
0.1 µF
VC
VS
Modulating
Signal Input 10 k
51
C1
0.1 µF
10 k 51
Re
RL
RL
82
1.0 k
3.9 k
3
3.9 k
10
1 MC1496
6
I9 I6
+ Vo
4
12
– Vo
51
14
5
50 k
R1
Carrier Null
I10 I5 6.8 k
V–
–8.0 Vdc
VEE
Figure 6. Input–Output Impedance
Re = 1.0 k
2
3
0.5 V 8
+ – 10
1 MC1496 6
Zin
4
12
14
5
6.8 k
Z+ouVto
– Vo
–8.0 Vdc
NOTE: Shielding of input and output leads may be needed
to properly perform these tests.
Figure 7. Bias and Offset Currents
VCC
12 Vdc
1.0 k
I7
I8
1.0 k I1
I4
Re = 1.0 k
2
8
10
3
2.0 k
I6
1 MC1496 6 I9
4
12
14
5
I10 6.8 k
–8.0 Vdc
VEE
Figure 8. Transconductance Bandwidth
1.0 k
Carrier
Input 0.1 µF
VC
VS
Modulating
Signal Input
10 k
51 0.1 µF
10 k 51
50 k
Carrier Null
1.0 k
Re
1.0 k
2
3
8
10
1 MC1496 6
4
12
51
14
5
6.8 k
V–
–8.0 Vdc
VEE
VCC
12 Vdc
2.0 k
0.01
50 50 µF
+ Vo
– Vo
4
MOTOROLA ANALOG IC DEVICE DATA
Share Link: 