RF IC Design Optimization- LNA with mathematical optimization & NGSpice

Methodology

Optimized vs. Original (5 GHz), md, Reality check (slides), md, 

schematic (grandparent) Sub 6 GHz

schematic 0.6 – 6 GHz (Sub-6),slides, slides+

running ngspice in Claude VM (findings, ill., also Cadence below, handout md) 5 GHz

recover from disaster

ngspice vs MNA overlay

initial parameters running MNA (findings, ill., handout md, detail md)

optimized parameters using MNA (share, handout md)

 father optimized from grandparent

Use Cowork with local VM

analytical (closed-form) vs. MNA

auto-correction of model, auto-optimize parameters

until all specs pass

CoWork Fable 5.0 update

MNA/Ngspice Overlay 

 Cadence

Cadence files (slides) LNA approximation, Spice vs Spectre PSS slides, PSS on LNA slides

P1dB, IIP3, Two-Tone from PSS Analysis (What's this: Explain P1dB, IIP3, Two-Tone)

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debug journal why I am here

final design

(final) Mirror-Biased 5 GHz Cascode LNA

P1dB, IIP3, Two-Tone from PSS Analysis

IIP3 by PSS Analysis

lineage

dev log 5 GHz LNA

Supplemental

One-stage vs. tw-stage LNA, which is better?

AI-Assisted Workflow Speedup

AI 在IC設計的應用 Cadence AI-Powered Design Solutions

Design Space Optimization