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參數(shù)資料
| 型號： | RM009 |
| 廠商： | SKYWORKS SOLUTIONS INC |
| 元件分類： | 放大器 |
| 英文描述： | Power Amplifier Module for Dual-band GSM900 DCS1800 |
| 中文描述： | 880 MHz - 915 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| 封裝： | 9.10 X 11.60 MM, SO-16 |
| 文件頁數(shù)： | 2/17頁 |
| 文件大?。?/td> | 304K |
| 代理商： | RM009 |
Technical Information
RM009
Power Amplifier Module for Dual-band GSM900 DCS1800 Applications
10
Skyworks Solutions, Inc. Proprietary
101258B
July 26, 2002
Technical Information
CMOS Bias Controller Characteristics
The CMOS die within the PAM performs several functions that are important to the overall
module performance. Some of these functions must be considered for development of the power
ramping features in a 3GPP compliant transmitter power control loop1. Power ramping
considerations will be discussed later in this section.
The four main functions that will be described in this section are Standby Mode Control, Band
Select, Voltage Clamp, and Current Buffer. The functional block diagram is shown in Figure 7.
1. Please refer to 3GPP TS 05.05, Digital Cellular Communications System (Phase 2+); Radio Transmission and Reception. All GSM
specifications are now the responsibility of 3GPP. The standards are available at http://www.3GPP.org/specs/specs.htm
Figure 7. Functional Block Diagram
Dual Band GaAs Power Amplifier Die
Bandgap
Reference
Combinational
Logic
CMOS bias controller
ground
Supply
(pin6)
C
bypass
C
bypass
RF
Isolation
RF
Isolation
Voltage Clamp
APC input
(pin14)
Band
Select
(pin16)
GSM900
bias out
DCS1800
bias out
C
Comp
C
Comp
cpdcs
vodcs
vogsm
cpgsm
100956_01
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