LT1251 Linear Technology, LT1251 Datasheet - Page 16

• Manufacturer Part Number: LT1251
• Description: 40MHz Video Fader and DC Gain Controlled Amplifier
• Manufacturer: Linear Technology

LT1251/LT1256
TYPICAL APPLICATIONS
16
V
IN
R1
R2
=
R3
R4
R1
R3
R4
V
–
+
IN
LT1252
R2
100
R
G
U
Variable Lowpass, Highpass and Allpass Filter
I
OUT
Controlled Gain, Voltage-to-Current Converter
14
13
=
CONTROL
VOLTAGE
1
2
V
R
IN
O
V
+
–
+
–
C
3
R
1
R
2
R
G
F
R
R
LT1256
V
C
V
5
FS
R
1k
R
1k
C
F
F
(Current Source)
R
FS
BASIC VARIABLE INTEGRATOR
1.5k
1.5k
10
2.5VDC
INPUT
OUTPUT RESISTANCE DEPENDS
ON MATCHING OF RESISTORS
14
13
V
1
2
FS
12
V
V
–
+
+
–
C
C
8
3
1
2
R
LT1256
C
R
5
R
1k
1k
R
R
1k
O
F
DC
F
R
FS
10
C
C
10k
V
V
FS
FS
+
–
12
LT1363
8
1251/56 TA09
I
OUT
R
R
1251/56 TA13
INVERTED
HIGHPASS
ALLPASS
LOWPASS