LT1228 Linear Technology, LT1228 Datasheet - Page 19

• Manufacturer Part Number: LT1228
• Description: 100MHz Current Feedback Amplifier with DC Gain Control
• Manufacturer: Linear Technology

TYPICAL
0.6V
RMS
A
PPLICATI
to 1.3V
RF INPUT
25MHz
RMS
10k
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
CARRIER
O
INPUT
30mV
100
U
V
V
V
200mV
BW = 30Hz TO 20MHz
S
S
OUT
S
3
2
4.7 F
Inverting Amplifier with DC Output Less Than 5mV
= ±5V, R5 = 3.6k
= ±15V, R5 = 13.6k
MUST BE LESS THAN
+
–
P–P
2
3
+
g
15V
m
–
+
FOR LOW OUTPUT OFFSET
3
2
5
7
V –
10k
RF AGC Amplifier (Leveling Loop)
+
–
4
g
–5V
m
V +
4
INPUT 8V
g
MODULATION
7
m
5V
0.01µF
Amplitude Modulator
LT1006
7
–15V
5
15V
R5
A3
5
+
4.7 F
10k
300
–
+
P–P
+
100 F
INCLUDES DC
1k
V
10k
10k
1
8
IN
R
1k
R
750
1
8
1
8
+
–
G
G
+
–
CFA
AMPLITUDE
+
–
–15V
ADJUST
100k
4
CFA
CFA
4pF
750
R
1k
R
F
F
COUPLE THERMALLY
6
6
470
10
1N4148’s
LT1228 • TA21
V
0dBm(230mV) AT
MODULATION = 0V
OUT
V
O
0.01µF
LT1228 • TA22
10k
OUTPUT
2V
P–P
LT1004
1.2V
4.7k
LT1228 • TA20
–15V
LT1228
19