張耀仁

星期三, 3月 04, 2026

Catch up 3/11/2026

Claude 知識遭遇蒸餾事件

EX#2 Solving Electronic Circuits

AI for solving amplifier electronics (課堂講義）

建議工具

使用 Claude Sonnet 4.6

使用 ChatGPT 5

使用 Gemini 3 Pro 免費額度最高 1M tokens

使用 Grok 4

Content share

share only link, pure text, markdown (md)
no attachments accepted, no html, screen dump, or png
non-compliant homework will be rejected and returned to you

課堂練習

Deadline: This Saturday at 23:59

Send all the share links to me chang212@gmail.com by email with subject EX#2 [your id, your name]

How to publish a Claude artifact

How to share a ChatGPT link

How to share a Grok link

How to share Gemini Link

四題任選兩題

1. Make the Bode plot of Circuit in Example 1, as below. You must verify the results for correctness.

The results must be scientifically accurate.

Topology B in Schematic

2. Lab Activity: Amplifier Gain & Frequency Response Using AI-Assisted Analysis

beta=100, c_pi=100 pF, c_mu=10 pF

beta=150, c_pi=20 pF, c_mu=2 pF

3. With the following circuit and its Bode plot, as in Example 3

textbook approximations

Think about the prompt used to generate the Bode plot. Why there is level off at high frequencies?

4. Comparing LLMs: Claude 4.6, Gemini 3.0 Pro, ChatGPT 5.0 (三選二) for the following task.

Animate in 3d (in three.js) Yagi-Uda Antenna, AI pipe inspector, or things you choose. （擇一）

The animation must be scientifically accurate.

Hints

Reasoning/Think/Extended Thinking Mode of the AI platform you use may be required for all the problems here

不是主修電子工程的同學，可以練習以下問題

share Claude

Grok

Claude man in the loop

Gemini 2.5 Pro got it right twice in a row

Catch up 3/4/2026

AI's expanding role in modern warfare

Solving Electronic Circuits (packed, archive)

Solve for the gain. Plot frequency response for the following amplifier circuit.

Source

artifact

AI Model Results:

Grok 4: Share Link (considers parasitic capacitance Cπ ≈ 50 pF, Cμ ≈ 2 pF) - gives (188 kHz)
Claude: gives 188 kHz,
ChatGPT 5: Share Link gives 187 kHz
Gemini 2.5 Pro: Share Link gives 188 kHz

Note: Lower cut-off comes from coupling capacitors (not shown here). assuming 1.0 μF

Generate professional grade Bode plot.

generate professional plot using Matplotlib

Bode plot

directly from Claude Opus 4.5 (share)

React (Claude) - Python w/Matplotlib - - Colab - Bode plot

Colab

Bode plot

1. React (Claude) - AIStudio - Python w/ Matplotlib - Colab - Plot

2. Reasoning (AIStudio) - AIStudio - Python w/ Matplotlib - Colab - Plot

我用Claude計算電晶體放大器，得出頻率響應理論值 2.4 MHz。然後我給他一組Grok 算出來的數據是 125 kHz，兩者差了20倍。

我沒有跟Claude 說這組數據哪裡來的，他稱讚我的數據是應該是用Spice 專業軟體跑出來的，而且提醒我他的計算是根據純理論，因為Spice 可以考慮更多細節去電路模擬，所以Claude認為我的數據比較值得參考。

接下來我跟他講這組數據是 Grok 4 算的，Claude 馬上變換語氣，說頻率響應不可能是125 kHz，業界標準至少在1 MHz 以上，說Grok:

Does not make any sense (完全沒有道理）
Against common sense (違背常識）
Distrust (不值得信賴）

可是剛剛不是還在稱讚「我的模擬」做得好？以前Claude 還會稱讚別家的AI有什麼優勢，現在看起來不演了。

Amplifier Circuit Analysis

Solve for the gain, plot freq response.

Share (Source)

share (Claude running Python internally on VM)

Hybrid-π Model, With bypass capacitors, without ignoring base current loading effects on bias networks, Av=-165 (Share including frequency response).
-194 for Vc vs. Vbase, Ibase ignored (Share)

Gemini 2.5 Pro gain & lower cut off freq match Claude, 4kHz.

Solve for the gain. Plot frequency response for the following amplifier circuit.

Source

share (Av=-2.31, Lower Cutoff 20 Hz, Upper Cutoff 10.46MHz)

Analysis with Cπ = 22.1 pF, Cμ = 3.0 pF

20Hz is assumed, not by calculation

Analysis with Cπ = 22.1 pF, Cμ = 3.0 pF:

Bode plot, fH = 10.46 MHz, RE not bypassed

Two-Stage Amplifier Analysis

Solve for the gain, plot frequency response.

Source

Schematic

colab unoptimized (share)

colab optimized (share)

colab increasing C2 from 1 to 10μF (other parameters differ from above)(share)

bypass 47, coupling 10 micro F

(gain approximate)

Artifact, Share (Cπ2=15 pF, Cμ2=3pF). Result: freq response, gain=8513, low cut off=46.5 Hz, high cut off=312kHz
Gemini: Result gain=8509, low cut off=46.5 Hz, high cut off=296 kHz @Cπ2=15 pF, Cμ2=3pF (good match!)

Compare

Artifact, Share. Result: gain=8559 (Hybrid-π Model, With bypass capacitors, without ignoring base current loading effects)
Artifact. Result: gain=9460 (Ignored base current loading effects)
comprehensive comparison simplified, do not ignore bias network, do not ignore base current

Can we ask for Bode plot without finding lower/higher cut-off freq?