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參數(shù)資料
| 型號： | PMB2333 |
| 廠商： | SIEMENS A G |
| 元件分類： | 衰減器 |
| 英文描述： | ICs for Communications |
| 中文描述： | UP/DOWN CONVERTER |
| 文件頁數(shù)： | 40/69頁 |
| 文件大?。?/td> | 1131K |
| 代理商： | PMB2333 |
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PMB 2333
Semiconductor Group
40
09.97
3.1.3
Mixer current may be increased to obtain a higher Input 3rd Order Intercept (IIP3), higher
1 dB Compression Point (P1dB), and increased Conversion Gain (G). In a typical
application, in order to increase mixer current from the minimum level of 800
μ
A, R5 and
R6 are added as shown in the circuit diagram at the end of this section. These external
resistors are placed in parallel to existing bias resistors internal to the PMB2333, thereby
reducing the aggregate resistance in the emitters and increasing current. As current is
increased by further reduction of the value of R5 and R6, the mixer inputs MI and MIX
may begin to suffer ‘RF Loading’ unless RF chokes are used between the MI/MIX pins
and R5 / R6 (compare test circuit 1).
For the data presented in this section, mixer current was varied in a different manner.
To eliminate the effects of RF impedance variation (due to ‘RF Loading’) at MI / MIX
caused by changing the values of R5 and R6 for different mixer currents, these resistors
were set equal to 1k
.
Mixer current was then varied by adjusting the power supply
voltage Vx. Note that Vx may take on positive values with respect to ground for low (e.g.
1mA) mixer currents, or negative values for higher currents.
Application hint - Mixer metrics versus mixer current
Figure 9: Modified mixer input circuitry
PMB 2333
mixer
MI
MIX
1 k
1 k
10 pF
-
1 pF
3.9 nH
2.2 pF
V
x
+
相關PDF資料 |
PDF描述 |
|---|---|
| PMB2341 | 10-pin Single PLL |
| PMB2347 | RF/IF Double PLL Frequency Synthesizer |
| PMB2349 | Optimized RF/IF Dual PLL Frequency Synthesizer |
| PMB2362 | Wireless Components Dual LNA |
| PMB2400 | GSM RECEIVER CIRCUIT |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PMB2333RV1.2 | 制造商:Infineon Technologies AG 功能描述: 制造商:Siemens 功能描述: |
| PMB2335 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF Mixer |
| PMB2335R-V11TR | 功能描述:IC MIXER BIPOLAR P-TSSOP-10 RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| PMB2341 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:10-pin Single PLL |
| PMB2347 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:RF/IF Double PLL Frequency Synthesizer |
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