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參數(shù)資料
| 型號： | ACPM-7812-BLK |
| 元件分類： | 放大器 |
| 英文描述： | 824 MHz - 849 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| 封裝： | 6 X 6 MM, 1.80 MM HEIGHT, SMT, 6 PIN |
| 文件頁數(shù)： | 3/24頁 |
| 文件大?。?/td> | 193K |
| 代理商： | ACPM-7812-BLK |
11
Design Tips to use Vcntl pin
Power Amplifier Control Using
Vcntl Pin on ACPM-7812
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
is complex and costly. Therefore
several different approaches have
been developed to provide an
acceptable trade-off between
optimum efficiency and optimum
manufacturability. The following
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. In fact, a fixed
control voltage is recommended
when using Agilent’s Power
Amplifiers, Vcntl = 2.5V for the
ACPM-7812. 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
supplies the Vcntl with enable/
disable (PA on/off mode).
Below is an example of how to
control the PA_ON and Vcntl pin
of the PA.
Power Mode
PA_ON
Vcntl
Power Range
Shut Down
LOW
0V
—
High Power
HIGH
2.5V*
≤ 28.5 dBm
Note: * Vcntl for Cell Band
To Duplexer
Battery
Enable
PA_ON
Vdd1
Vdd2
Vcntl
PA
TxIC
Switch Circut for PA
Baseband
IC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ACPM-7813-BLK | 824 MHz - 849 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| ACPM-7833 | 1850 MHz - 1910 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| ACPM-7881-TR1 | 1920 MHz - 1980 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| ACPM-7886-BLK | 2010 MHz - 2025 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| ACPM-7886-TR1 | 2010 MHz - 2025 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ACPM-7812-TR1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Amplifier. Other |
| ACPM-7813 | 制造商:Avago Technologies 功能描述:824 MHz - 849 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| ACPM-7813-BLK | 功能描述:射頻放大器 CDMA Amp 824-849MHz 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: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-7813-TR1 | 功能描述:射頻放大器 CDMA Amp 824-849MHz 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: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-7821 | 制造商:AVAGO 制造商全稱:AVAGO TECHNOLOGIES LIMITED 功能描述:4 x 4 Power Amplifier Module for J-CDMA (898 - 925 MHz) |
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