LT1228(Rev_A) 查看數據表（PDF） - Linear Technology

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LT1228
(Rev.:Rev_A)

100MHz Current Feedback Amplifier with DC Gain Control

Linear Technology 

LT1228

TYPICAL APPLICATI S

RF INPUT 10k

0.6VRMS to 1.3VRMS

25MHz

RF AGC Amplifier (Leveling Loop)

15V

3+ 7

100 Ω

gm

2–

5

300Ω

1+

CFA

8–

4

–15V

10k

4pF

0.01µF

10k

470Ω

10Ω

OUTPUT

2VP–P

0.01µF

10k

15V

A3

LT1006

–15V

10k

100k

AMPLITUDE

ADJUST

1N4148’s

COUPLE THERMALLY

4.7k

–15V

LT1004

1.2V

LT1228 • TA20

Inverting Amplifier with DC Output Less Than 5mV

V+

2–

7

gm

3+

4

5

R5

+

1+

100µF 8 – CFA

V–

RF

1k

VS = ±5V, R5 = 3.6k

VS = ±15V, R5 = 13.6k

VOUT MUST BE LESS THAN

RG

1k

200mVP–P

BW = 30Hz

FOR LOW OUTPUT

TO 20MHz

OFFSET VIN

INCLUDES

DC

6

VO

LT1228 • TA21

Amplitude Modulator

5V 4.7µF

3+ 7

gm

1+

CARRIER

INPUT

30mV

2–

5

4

10k

4.7µF +

CFA

6

1k 8 –

RF

750Ω

–5V

MODULATION

RG

750Ω

INPUT ≤ 8VP–P

VOUT

0dBm(230mV) AT

MODULATION = 0V

LT1228 • TA22

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.

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