[问答]

最近在使用LTspice仿真一个电路，在做AC仿真时遇到以下问题，希望大神指点。

11875 LTspice

问答对人有帮助，内容完整，我也想知道答案 0 图片中是遇到的问题：下面是SPICE Error Log： Circuit: * G:LTspice projecttiA design2.asc WARNING: Node N002 is floating. WARNING: Less than two connections to node +5V. This node is used by V1. WARNING: Less than two connections to node -5V. This node is used by V2. WARNING: Less than two connections to node U1:100. This node is used by S:U1:2. WARNING: Less than two connections to node U1:101. This node is used by S:U1:3. WARNING: Less than two connections to node U1:105. This node is used by R:U1:F. WARNING: Less than two connections to node VO1. This node is used by R1. Direct Newton iteration failed to find .op point. (Use ".option noopiter" to skip.) Starting Gmin stepping Gmin = 10 vernier = 0.5 Gmin = 2.07126 vernier = 0.25 vernier = 0.125 vernier = 0.0625 vernier = 0.03125 Gmin = 2.20755 vernier = 0.015625 vernier = 0.0208333 Gmin = 2.13698 vernier = 0.0277778 vernier = 0.037037 Gmin = 1.99182 vernier = 0.0493827 Gmin = 1.78347 vernier = 0.0658435 vernier = 0.0877914 Gmin = 1.48254 vernier = 0.117055 vernier = 0.156073 Gmin = 1.10597 vernier = 0.0780367 vernier = 0.0390184 vernier = 0.0195092 vernier = 0.00975459 vernier = 0.0048773 vernier = 0.00243865 Gmin = 1.02446 vernier = 0.00121932 vernier = 0.000609662 vernier = 0.000457246 Gmin = 0 Gmin stepping failed Starting source stepping with srcstepmethod=0 Could not converge to DC with sources off! Starting source stepping with srcstepmethod=1 Could not converge to DC with sources off! Singular matrix: Check node u1:106 Iteration No. 16 Fatal Error: Singular matrix: check node u1:106 Iteration No. 16 This circuit has floating nodes. 0 1.png (29.77 KB, 下载次数: 5) 已退回10积分
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