參數(shù)資料
型號: CX77304-15
廠商: SKYWORKS SOLUTIONS INC
元件分類: 放大器
英文描述: 2MM SOCKET STRIPS
中文描述: 824 MHz - 849 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER
封裝: 9.10 X 11.60 MM, 1.50 MM HEIGHT, LEAD FREE, PLASTIC, LEADLESS, SO-16
文件頁數(shù): 5/20頁
文件大小: 620K
代理商: CX77304-15
CX77304-15
Technical Information
PA Module for Dual-Band GSM850 PCS1900 / GPRS Applications
101749A
Skyworks Solutions, Inc.
13
September 19, 2003
Proprietary Information
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)
Cbypass
RF
Isolation
RF
Isolation
Voltage Clamp
APC input
(pin14)
Band
Select
(pin16)
GSM850
bias out
PCS1900
bias out
CComp
cpdcs
vodcs
vogsm
cpgsm
101749_011
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