LNA設計方法和步驟

設計步驟
下載并安裝晶體管的庫文件；
直流分析；
偏置電路設計；
穩定性分析；
噪聲系數圓和輸入匹配；
最大增益的輸出匹配；
匹配網絡實現；
版圖設計；
原理圖-版圖聯合仿真；

LNA設計
a) Bias conditions: 3 V supply, 2 mA collector current
b) Noise figure as low as possible (given the bias conditions) at 2 GHz.
c) Gain > 10 dB at 2 GHz
d) Input and output reflection coefficients better than -10 dB at 2 GHz.
e) Unconditionally stable.

設計步驟
1.“Curve_Tracer” simulates the collector current versus collector voltage with the base current swept as a parameter.


2.“DC_and_Sparams” shows a bias network design, and includes a simulation of the S-parameters and a calculation of the stability of the biased device.


3.“Gain_and_Stab_opt” shows the addition of an optimized stabilizing networks added to achieve unconditional stability, simulated from 0 to 3 GHz.


4.“Circles” simulates the S-parameters, noise parameters and stability parameters before the addition of input and output matching networks.



5.“Input_match” designs the input matching network to generate a source impedance that is a tradeoff between gain and noise figure.


6.“Amp_wInputMatch” shows a simulation of the amplifier with both stability networks and the input matching network added.


7.“Output_match” designs the output matching network for simultaneous conjugate match.


8.“Amp_wBothMatches” simulates the amplifier with stability networks and both matching networks added. The results are not as good as expected, so an optimization is run next.

9.“Amp_wMatchOpt” is an optimization of the input and output matching component values to achieve a better gain, input match, and output match at 2 GHz, while not degrading the noise figure.


10.“DC_OP_POINT” simulates the colelctor current versus base voltage, with the collector voltage set to 3 V.

總結

以上是生活随笔為你收集整理的ADS仿真5_LNA设计的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。