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參數(shù)資料
| 型號： | RF3330 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 衰減器 |
| 英文描述： | IF GAIN CONTROLLED AMPLIFIER |
| 中文描述： | RF/MICROWAVE WIDE BAND MEDIUM POWER AMPLIFIER |
| 封裝： | ROHS COMPLIANT, SOT-23, 8 PIN |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 143K |
| 代理商： | RF3330 |
Preliminary
3-8
RF3330
Rev A2 010820
3
L
A
Output
On the output, the losses due to the resistive matching
pad must also be calibrated out of the setup. Because
of the 1:1 transformer, the spectrum analyzer appears
as a 50
resistor in parallel with this circuit (see Figure
2). Equation 4 illustrates the calculation necessary to
obtain the amount of loss due to this matching circuit.
The balun also has an additional 0.5dB to 1.0dB of
loss, which is added in to the overall output losses.
This was verified with a spectrum analyzer probe. The
offset used in the test setup is 32.5dB on the spectrum
analyzer.
Resistive Pad Loss=
20*log(25/(470+25+470))=-31.7dB
Eq. 4
3330410 Evaluation Board
1:1
Transformer
Frequency =
1 MHz to
150 MHz
Spectrum Analyzer
Resistive
Match
Mini-Circuits
ZMSCJ-2-1
Divider
Frequency =
1 MHz to
150 MHz
Frequency =
1 MHz to
150 MHz
Signal Generator
RF3330
Figure 1. RF3330 Test Setup
R4
470
R3
51
50
R2
470
Figure 2. Equivalent Output Circuit
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| RF3330_06 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:IF GAIN CONTROLLED AMPLIFIER |
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| RF3330TR7 | 制造商:RF Micro Devices Inc 功能描述:IC IF GAIN CONTROL AMP SOT23-8 |
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