LT1251 查看數據表（PDF） - Linear Technology
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LT1251 Datasheet PDF : 24 Pages
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LT1251/LT1256
TYPICAL APPLICATIONS
4-Quadrant Multiplier as a Double-Sideband Suppressed-Carrier Modulator
RG1
1.5k
MODULATION
1MHz
CARRIER
0.1µF 10k*
1
LT1256
+
2
1
–
2
CONTROL
3
+
C
4–
IC IFS
FS
5
5k
5k
6
10k
V– 7
2.5VDC
INPUT
0.1µF
*TRIM FOR SYMMETRY
14
13
12
11
10
9 V+
8
RF2 RF1
1.5k 1.5k
VOUT
1251/56 TA04a
Modulation Gain vs Control Voltage
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
VS = ±5V
VFS = 2.5V
0.5 1.0 1.5 2.0 2.5
CONTROL VOLTAGE, PIN 3 (V)
1251/56 TA04b
Soft Clipper
1.5k
2
–
LT1256
11
+
8
VOUT
VIN
14 +
V+ 9
13 2
–
V– 7
VC RC RFS VFS
3 5 10 12 2.5VDC
INPUT
1N914
1N914
200pF
5k 1k
1.5k
1251/56 TA10a
VIN
VOUT
VFS = 2.5V
VS = ±5V
f = 1kHz
1251/56 TA10b
RELATED PARTS
PART NUMBER
LT1228
LT1252
LT1253/LT1254
LT1259/LT1260
DESCRIPTION
100MHz Current Feedback Amplifier with DC Gain Control
Low Cost Video Amplifier
Low Cost Dual and Quad Video Amplifiers
Low Cost Dual and Triple 130MHz Current Feedback
Amplifiers with Shutdown
COMMENTS
Includes a 75MHz Transconductance Amplifier
100MHz Bandwidth
90 MHz Bandwidth
Makes Fast Video MUX
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
LT/GP 0896 REV A 5K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1994
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