Circuit Sim Lab (電路模擬實驗室)
Server Details
PCB calculators: trace impedance, crosstalk, diff skew, crystal load cap, Vout tolerance, inrush.
- Status
- Healthy
- Last Tested
- Transport
- Streamable HTTP · MCP 2025-06-18
- URL
TDQS
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Available Tools
6 toolscrosstalk串音(解析式:近端/遠端係數)Inspect
兩條耦合線的串音:偶/奇模阻抗用 2D 電場數值解,再算近端串音係數 kb、飽和比例、遠端串音係數。只回傳解析式的部分(不含工具頁的 ngspice 時域波形)。
| Name | Required | Description | Default |
|---|---|---|---|
| h | No | 微帶線:線到參考層的介質厚度(kind=ms)(mm) | |
| s | No | 差動對的線間距(單線 single 模式不用)(mm) | |
| t | No | 銅厚(35 µm=1 oz)(mm) | |
| w | No | 線寬(mm) | |
| er | No | 板材介電常數 εr(帶狀線上下用同一個) | |
| ha | No | 帶狀線:線頂到上參考層(kind=sl)(mm) | |
| hb | No | 帶狀線:線底到下參考層(kind=sl)(mm) | |
| tr | No | 攻擊線的上升時間(10–90%)(ps) | |
| len | No | 並行長度(mm) | |
| kind | No | ms=微帶線(外層)、sl=帶狀線(內層,上下都有參考層) | ms |
diff_skew差動對對內 skewInspect
兩條線的長度差換成時間差(ps),對照介面規範的限制(USB3/PCIe/DisplayPort/HDMI,限制值附原廠文件出處)。
| Name | Required | Description | Default |
|---|---|---|---|
| ee | No | 有效介電常數 εeff | |
| ln | No | N 線長度(mm) | |
| lp | No | P 線長度(mm) | |
| rate | No | 資料速率(UI=1000÷速率 ps)(Gbps) | |
| iface | No | 介面:none/usb3/pcie/dp/hdmi | none |
impedance差動/單端阻抗(微帶線、帶狀線)Inspect
用 2D 電場數值解算微帶線或帶狀線的差動阻抗(Zdiff、Zcomm、奇/偶模)或單端阻抗(Z0),含銅厚。回傳附適用範圍。
| Name | Required | Description | Default |
|---|---|---|---|
| h | No | 微帶線:線到參考層的介質厚度(kind=ms)(mm) | |
| s | No | 差動對的線間距(單線 single 模式不用)(mm) | |
| t | No | 銅厚(35 µm=1 oz)(mm) | |
| w | No | 線寬(mm) | |
| er | No | 板材介電常數 εr(帶狀線上下用同一個) | |
| ha | No | 帶狀線:線頂到上參考層(kind=sl)(mm) | |
| hb | No | 帶狀線:線底到下參考層(kind=sl)(mm) | |
| kind | No | ms=微帶線(外層)、sl=帶狀線(內層,上下都有參考層) | ms |
| mode | No | diff=差動對、single=單線 | diff |
inrush_current湧入電流(負載開關控速/直接接電容)Inspect
負載開關控速上升時的充電電流、峰值電流、能量與脈衝 I²t(mode=slew),或電容直接接電源時的串聯 R-L-C 步階電流(mode=direct)。
| Name | Required | Description | Default |
|---|---|---|---|
| ct | No | CT 腳電容(ctsel≠none 時用)(pF) | |
| lh | No | 線路電感(direct)(nH) | |
| rl | No | 負載電阻(0=不接)(Ω) | |
| rs | No | 線路+電源內阻(direct)(mΩ) | |
| tr | No | 輸出上升時間(10–90%,ctsel=none 時用)(µs) | |
| esr | No | 電容 ESR(direct)(mΩ) | |
| vin | No | 輸入電壓(V) | |
| cout | No | 輸出電容(µF) | |
| mode | No | slew=負載開關控速、direct=直接接電容 | slew |
| ctsel | No | 用 CT 腳電容決定上升時間:none/t918/t965 | none |
output_voltage_tolerance輸出電壓公差(回授分壓)Inspect
回授電阻分壓的輸出電壓:最壞情況(每項取上下限的所有組合)、RSS 統計;可選蒙地卡羅超規比例。
| Name | Required | Description | Default |
|---|---|---|---|
| n | No | 蒙地卡羅次數 | |
| dt | No | 溫差(°C) | |
| r1 | No | 上電阻 R1(kΩ) | |
| r2 | No | 下電阻 R2(kΩ) | |
| tc | No | 電阻溫漂(ppm/°C) | |
| tr | No | 電阻公差 ±(%) | |
| ifb | No | 回授腳偏壓電流(典型)(nA) | |
| dist | No | 蒙地卡羅的誤差分布 | normal |
| tifb | No | 回授腳偏壓電流(最大偏離)(nA) | |
| tref | No | VREF 精度 ±(%) | |
| vmax | No | 允許的輸出上限(V) | |
| vmin | No | 允許的輸出下限(V) | |
| vref | No | 參考電壓 VREF(V) | |
| track | No | 1=兩顆電阻溫漂同向(互相抵消) | |
| monte_carlo | No | true=多跑蒙地卡羅(固定亂數種子,可重現) |
xtal_load_cap晶振負載電容與增益餘裕Inspect
外掛電容 C1、C2 與雜散電容算出實際負載電容 CL、頻率偏移 ppm、振盪增益餘裕、驅動功率,並給出剛好對上規格 CL 的電容值。
| Name | Required | Description | Default |
|---|---|---|---|
| f | No | 晶振頻率(MHz) | |
| c0 | No | 並聯電容 C0(pF) | |
| c1 | No | 外掛電容 C1(pF) | |
| c2 | No | 外掛電容 C2(pF) | |
| cm | No | 動態電容 Cm(fF) | |
| cs | No | 雜散電容(腳位+走線)(pF) | |
| gm | No | 晶片振盪器跨導 gm(mA/V) | |
| cls | No | 晶振規格的負載電容 CL(pF) | |
| esr | No | 等效串聯電阻 ESR(最大值)(Ω) | |
| vpp | No | C1 那端的峰對峰電壓(算驅動功率用)(V) |
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
6 tool updates
- First observed
crosstalk - First observed
diff_skew - First observed
impedance - First observed
inrush_current - First observed
output_voltage_tolerance - First observed
xtal_load_cap
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