LT1228CJ8PBF(Rev_C) Просмотр технического описания (PDF) - Linear Technology

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LT1228CJ8PBF
(Rev.:Rev_C)

100MHz Current Feedback Amplifier with DC Gain Control

Linear Technology 

LT1228

TYPICAL APPLICATIO S

RF AGC Amplifier (Leveling Loop)

RF INPUT 10k

0.6VRMS to 1.3VRMS

25MHz

15V

3+ 7

100 Ω

gm

2–

5

300Ω

10k

0.01µF

1+

CFA

8–

4

–15V

4pF

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

CARRIER

INPUT

30mV

gm

2–

5

4

10k

4.7µF +

1+

CFA

6

1k 8 –

RF

750Ω

–5V

MODULATION

INPUT ≤ 8VP–P

RG

750Ω

VOUT

0dBm(230mV) AT

MODULATION = 0V

LT1228 • TA22

RELATED PARTS

PART NUMBER

LT1227

LT1251/LT1256

LT1399

DESCRIPTION

140MHz Current Feedback Amplifier

40MHz Video Fader

400MHz Current Feedback Amplifier

COMMENTS

1100V/µs Slew Rate, 0.01% Differential Gain, 0.03% Differential Phase

Accurate Linear Gain Control: ±1% Typ, ±3% Max

800V/µs Slew Rate, 80mA Output Current

20 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

1228fc

LT 0107 REV C • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1994

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