AD534LD Просмотр технического описания (PDF) - Analog Devices
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AD534LD Datasheet PDF : 12 Pages
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AD534–Applications Section
The versatility of the AD534 allows the creative designer to
implement a variety of circuits such as wattmeters, frequency
doublers and automatic gain controls to name but a few.
A
X1
+VS
+15V
A–B
2
X2
OUT
OUTPUT = A2 – B2
10V
30k⍀
SF
Z1
AD534
10k⍀
Z2
B
Y1
A+B
2
Y2
–VS
–15V
Figure 8. Difference-of-Squares
CONTROL INPUT,
EC, ZERO TO ؎5V
SET
GAIN
1k⍀ 2k⍀
–VS
X1
+VS
X2
OUT
AD534
SF
Z1
Z2
+15V
39k⍀
1k⍀
OUTPUT, ؎12V PK
=
EC ES
0.1V
0.005F
Y1
SIGNAL INPUT,
ES, ؎5V PK
Y2
–VS
–15V
NOTES:
1) GAIN IS X 10 PER-VOLT OF EC, ZERO TO X 50
2) WIDEBAND (10Hz – 30kHz) OUTPUT NOISE IS 3mV RMS, TYP
CORRESPONDING TO A.F.S. S/N RATIO OF 70dB
3) NOISE REFERRED TO SIGNAL INPUT, WITH EC = ؎5V, IS 60V RMS, TYP
4) BANDWITH IS DC TO 20kHz, –3dB, INDEPENDENT OF GAIN
Figure 9. Voltage-Controlled Amplifier
MODULATION
INPUT, ؎EM
CARRIER
INPUT
EC sin t
X1
+VS +15V
X2
OUT
SF
Z1
AD534
Z2
Y1
Y2
–VS
OUTPUT
=
1؎
EM
10V
EC
sin
t
–15V
THE SF PIN OR A Z-ATTENUATOR CAN BE USED TO PROVIDE OVERALL
SIGNAL AMPLIFICATION, OPERATION FROM A SINGLE SUPPLY POSSIBLE;
BIAS Y2 TO VS/2.
Figure 11. Linear AM Modulator
9k⍀
1k⍀
B INPUT
(+VE ONLY)
X1
+VS +15V
X2
OUT
SF
Z1
AD534
Z2
Y1
Y2
–VS
–15V
A–B
OUTPUT = (100V)
B
(1% PER VOLT)
A INPUT
(؎)
OTHER SCALES, FROM 10% PER VOLT TO 0.1% PER VOLT
CAN BE OBTAINED BY ALTERING THE FEEDBACK RATIO.
Figure 12. Percentage Computer
10k⍀
INPUT, E
0 TO +10V
X1
+VS +15V
X2
OUT
18k⍀ AD534
SF
Z1
Z2
Y1
4.7k⍀
4.3k⍀
OUTPUT = (10V) sin
WHERE = 2
E
10V
3k⍀
Y2
–VS –15V
USING CLOSE TOLERANCE RESISTORS AND AD534L, ACCURACY
OF FIT IS WITHIN ؎0.5% AT ALL POINTS. IS IN RADIANS.
Figure 10. Sine-Function Generator
INPUT, Y ؎10V FS
X1
+VS +15V
X2
OUT
AD534
SF
Z1
Z2
Y1
Y2
–VS –15V
OUTPUT, ؎5V/PK
y
= (10V) 1 + y
WHERE y = Y
(10V)
Figure 13. Bridge-Linearization Function
–8–
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