MPY634AM BURR-BROWN [Burr-Brown Corporation], MPY634AM Datasheet - Page 8

• Manufacturer Part Number: MPY634AM
• Description: Wide Bandwidth PRECISION ANALOG MULTIPLIER
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

FIGURE 8. Sine-Function Generator.
FIGURE 10. Frequency Doubler.
FIGURE 11. Balanced Modulator.
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.
0 to +10V
18k
10k
Input, E
Modulation
Input, ±E
Carrier
+15V
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).
Null
470k
®
Carrier Input
MPY634
E
M
C
X
X
SF
Y
Y
A sin
sin
1
2
1
2
MPY634
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.
t
1k
–15V
t
+V
–V
Out
Z
Z
S
S
1
2
–15V
4.7k
4.3k
X
X
SF
Y
Y
1
2
1
2
MPY634
X
X
SF
Y
Y
+15V
1
2
1
2
MPY634
+V
–V
Out
Z
Z
3k
S
S
1
2
+V
–V
Out
Z
Z
S
S
1
2
–15V
V
Where
OUT
= ( /2) (E /10V)
–15V
+15V
= (10V) sin
+15V
C
V
(A
OUT
2
/20) cos (2
R
8
FIGURE 9. Linear AM Modulator.
t)
By injecting the input carrier signal into the output through connection
to the Z
Amplification can be achieved by use of the SF pin, or Z attenuator
(at the expense of bandwidth).
Carrier Input
Modulation
Input, ±E
E
C
sin t
2
input, conventional amplitude modulation is achieved.
Carrier: f
Signal: f
M
Output Signal: 10Vp-p, 400kHz
Input Signal: 20Vp-p, 200kHz
S
C
= 120kHz, Amplitude = 10V peak
= 2MHz, Amplitude = 1Vrms
X
X
SF
Y
Y
Frequency Doubler
1
2
1
2
MPY634
+V
–V
Out
Z
Z
S
S
1
2
–15V
+15V
V
1 ± (E
OUT
=
M
/10V) E
C
sin t