參數(shù)資料
型號(hào)： ACPM-7833-BLK
廠商： AGILENT TECHNOLOGIES INC
元件分類： 放大器
英文描述： 1850 MHz - 1910 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER
封裝： 4 X 4 MM, 1.10 MM HEIGHT, SMT, 10 PIN
文件頁(yè)數(shù)： 3/21頁(yè)
文件大?。?/td> 182K
代理商： ACPM-7833-BLK
11
Design Tips to use Vcntl pin
Power Mode
PA_ON
Vcntl
Power Range
Shut Down
LOW
0V
—
High Power
HIGH
2.5V
≤ 28.5 dBm
To Duplexer
Battery
Vcntl
PA
TxIC
Switch Circuit for PA
Baseband
IC
PA_ON
Enable
Vdd1
Vdd2
Vbias
Vcntl
PMIC or LDO
Note: PMIC: Power Management IC
LDO: Low Drop Output (Regulator)
Power Amplifier Control Using Vcntl
Pin on ACPM-7833
Power amplifier control scheme
in CDMA systems is one of the
important and challenging
aspects of CDMA-based handset
design. Handset designers must
balance maintaining adequate
linearity while optimizing
efficiency at high, medium and
low output power levels. The
primary method to achieve these
goals is to adjust the bias of the
PA as a function of output power.
Theoretically, the best efficiency
would be achieved when the bias
of the PA is continually adjusted
based on the output power
requirement of the PA. However,
implementing this type of circuit
can be complex and costly.
Therefore several different
approaches have been developed
to provide an acceptable trade-
off between optimum efficiency
and optimum manufacturability.
This application section reviews
four methods of controlling the
bias of a CDMA power amplifier:
fixed, step, logical and dynamic.
1. Fixed Bias Control
Using a fixed bias point on the
PA is the traditional method, and
it is the simplest. For example,
the recommended value of the
fixed control voltage on the Vcntl
pin for the ACPM-7833 is 2.5V.
The Vcntl pin on the PA is
controlled by PA_ON pin of the
baseband IC. When PA_ON is
HIGH, the output RF signal of the
PA is enabled, enabling the
subscriber unit to transmit the
required data. The switch circuit
also controls the on/off state of
the PA.
Below is an example of how to
control the the output of the PA
using PA_ON and Vcntl pins.
相關(guān)PDF資料
PDF描述
ACPM-7833-TR1 1850 MHz - 1910 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER
ACPM-7833-BLK 1850 MHz - 1910 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER
ACPM-7833-TR1 1850 MHz - 1910 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER
AD8343ARUZ-REEL7 0 MHz - 2500 MHz RF/MICROWAVE DOUBLE BALANCED MIXER
AD8343ARUZ-REEL 0 MHz - 2500 MHz RF/MICROWAVE DOUBLE BALANCED MIXER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ACPM-7833-TR1 功能描述:射頻放大器 CDMA Amp 1850-1910MHz RoHS:否 制造商:Skyworks Solutions, Inc. 類型:Low Noise Amplifier 工作頻率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 輸出截獲點(diǎn):37.5 dBm 功率增益類型:32 dB 噪聲系數(shù):0.85 dB 工作電源電壓:5 V 電源電流:125 mA 測(cè)試頻率:2.6 GHz 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 封裝:Reel
ACPM-7868 制造商:AVAGO 制造商全稱:AVAGO TECHNOLOGIES LIMITED 功能描述:5 x 5 mm Power Amplifier Module Linear Quad-Band GSM/EDGE
ACPM-7868-BLK 制造商:Avago Technologies 功能描述:PA MODULE, LINEAR EDGE, 5X5MM - Bulk
ACPM-7868-TR1 制造商:Avago Technologies 功能描述:PA MODULE, LINEAR EDGE, 5X5MM
ACPM-7881-BLK 功能描述:射頻放大器 W-CDMA Amp 1920-1980MHz RoHS:否 制造商:Skyworks Solutions, Inc. 類型:Low Noise Amplifier 工作頻率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 輸出截獲點(diǎn):37.5 dBm 功率增益類型:32 dB 噪聲系數(shù):0.85 dB 工作電源電壓:5 V 電源電流:125 mA 測(cè)試頻率:2.6 GHz 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 封裝:Reel
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