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| 型號： | P12763EJ1V0AN00 |
| 英文描述： | MCU CMOS 28 LD 20MHZ 8K FLASH, -40C to +85C, 28-SPDIP, TUBE |
| 中文描述： | uPC8119T和uPC8120T可變增益高頻硅單片放大器的AGC移動通信股 |
| 文件頁數(shù)： | 5/19頁 |
| 文件大?。?/td> | 159K |
| 代理商： | P12763EJ1V0AN00 |
5
TABLE OF CONTENTS
1.
PREFACE.........................................................................................................................................
7
2.
PRODUCT OUTLINE.......................................................................................................................
7
3.
PRODUCTION PROCESS...............................................................................................................
7
4.
INTERNAL CIRCUIT CONFIGURATION AND OPERATION......................................................
8
5.
EXTERNAL CIRCUIT CONFIGURATION......................................................................................
5.1 V
CC
Line and V
AGC
Pin (Determining minimum gain)...........................................................
5.2 Output Matching (Determining maximum gain)...................................................................
5.3 Input Pin ...................................................................................................................................
5.4 Parameters for Matching Circuit Designing..........................................................................
5.5 Supplement on Application....................................................................................................
9
9
9
9
13
16
6.
OTHER APPLICATION EXAMPLES..............................................................................................
16
7.
CONCLUSION..................................................................................................................................
18
PRECAUTIONS FOR DESIGN-INS
(1) Observe precautions for handling because of electro-static sensitive devices.
(2) Form as wide a ground pattern as possible to minimize the ground impedance. Especially, connect patterns to
avoid generating different impedance among the ground pins.
(3) Insert a feedback capacitor (of 1000 pF for example) between the V
CC
and AGC pins.
(4) Insert a
S
type circuit consisting of a series inductor and two parallel capacitors (4.7 nH and 1000 pF for
example) outside the feedback capacitor of the V
CC
pin.
(5) Connect an external LC matching circuit including a parallel inductor to the output pins. The RF ground of the
parallel inductor must be the
S
type circuit opposite to the V
CC
pin.
(6) The DC cut capacitor must be attached to the input pin. Do not externally adjust the pin voltage.
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