- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382684 > TQ5M34 Analog IC PDF資料下載
參數(shù)資料
| 型號(hào)： | TQ5M34 |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁(yè)數(shù)： | 10/18頁(yè) |
| 文件大小： | 207K |
| 代理商： | TQ5M34 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)當(dāng)前第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)
TQ5M34
Data Sheet
10
For additional information and latest specifications, see our website:
www.triquint.com
Mxer – Filter Interaction:
Before attempting a new TQ5M34 application, it is important
to understand the nonlinear interaction between the image
filter and the mxer. The device IP3 and Idd are a strong
function of this interaction. For this reason it is helpful to
consider the filter and TQ5M34 as one nonlinear block.
Figure 3 shows a much simplified block diagramof the image
filter and mxer. The RF signal passes through the image filter
and is converted down to the IF where it is amplified by the IF
output FET. The quiescent current in the IF amplifier is set by
the GIC network. Both the filter and the mxer termnate the
RF signal with 50 ohms.
However, the situation is much different with the LO signal. At
the LO frequency the image filter looks like a short circuit.
Some LO energy leaks out of the RF port, bounces back off of
the image filter and returns back into the mxer with some
phase or delay. The delayed LO signal mxes with the normal
LO to create a DC offset which is fed into the IF amplifier and
changes the quiescent current. Depending on the phase of
the reflected LO, the IF stage current may be higher or lower.
The DC offset also affects the passive mxer FET to some
degree as well. It has been found empirically that varying the
delay between the filter and mxer can have positive or
negative consequences on IP3, CG, and NF. Because the RF
input matching network also affects the LO leakage phase,
improvements in IP3 can be made by simply using a different
topology RF input matching network.
Thus tuning the TQ5M34 for a specific application becomes
an iterative process.
25-100 ohms at RF-
short circuit at LO
band pass
LO Leakage
LO Leakage
( f )
Mixer
LO
IF + DC
Offset
RF in
TQ5M34
+ LO) = DC Offset
(LO Leakage
( f )
at Mixer IF Output
Idd + Idd Offset
IF Output
FET
to GIC
RF in
IF Output
Figure 3. Non-linear filter-Mxer Interaction
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TQ8214 | Industrial Control IC |
| TQ8219 | Optoelectronic |
| TQ8223 | ATM/SONET Demultiplexer |
| TQ8224 | Industrial Control IC |
| TQ8318 | Telecommunication IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TQ5M44 | 制造商:TRIQUINT 制造商全稱:TriQuint Semiconductor 功能描述:RF Mixer IC |
| TQ6111BI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
| TQ6111BV | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
| TQ6111D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
| TQ6111M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。