參數(shù)資料
型號(hào)： MPY634SM
英文描述： Wide Bandwidth PRECISION ANALOG MULTIPLIER
中文描述： 寬帶精密模擬乘法器
文件頁(yè)數(shù)： 8/8頁(yè)
文件大?。?/td> 122K
代理商： MPY634SM
MPY634
8
FIGURE 9. Linear AM Modulator.
FIGURE 8. Sine-Function Generator.
MPY634
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
–V
S
–15V
+15V
V
= (10V) sin
Where
= (
π
/2) (E /10V)
θ
4.7k
Input, E
0 to +10V
With a linearly changing 0-10V input, this circuit’s output follows
0° to 90° of a sine function with a 10V peak output amplitude.
4.3k
3k
10k
18k
θ
θ
FIGURE 11. Balanced Modulator.
Carrier: f
C
= 2MHz, Amplitude = 1Vrms
Signal: f
S
= 120kHz, Amplitude = 10V peak
MPY634
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
–V
S
–15V
+15V
Carrier Input
E
C
sin
ω
t
The basic muliplier connection performs balanced modulation.
Carrier rejection can be improved by trimming the offset voltage
of the modulation input. Better carrier rejection above 2MHz is
typically achieved by interchanging the X and Y inputs (carrier
applied to the X input).
1k
V
OUT
470k
+15V
–15V
Modulation
Input, ±E
M
Carrier
Null
FIGURE 10. Frequency Doubler.
Frequency Doubler
Input Signal: 20Vp-p, 200kHz
Output Signal: 10Vp-p, 400kHz
MPY634
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
–V
S
(A
2
/20) cos (2
ω
t)
Squaring a sinusoidal input creates an output frequency of
twice that of the input. The DC output component is
removed by AC-coupling the output.
R
C
A sin
ω
t
–15V
+15V
MPY634
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
–V
S
–15V
+15V
V
=
1 ± (E
M
/10V) E
C
sin
ω
t
Carrier Input
E
C
sin
ω
t
By injecting the input carrier signal into the output through connection
to the Z
input, conventional amplitude modulation is achieved.
Amplification can be achieved by use of the SF pin, or Z attenuator
(at the expense of bandwidth).
Modulation
Input, ±E
M
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