On Wed, Apr 23, 2025 at 12:55 AM, §¡§Ý§Ö§Ü§ã§Ñ§ß§Õ§â §¢§à§â§Õ§à§Õ§í§ß§à§Ó wrote:
Hi.
I made an addition to your scheme. This is the calculation of dH/dT by a separate, controlled current source with RC. The resulting value is used to calculate delta. I made a netlist and used it to calculate Qspice. I had to replace the parameter k with k0, because in Qspice k is the Boltzmann constant. At tau=10ns, the counting time was 2.2 seconds. And everything was fine.
Thanks!
It looks like the trtol setting played a crucial role¡ªit successfully reduced the oscillations. The reason behind the oscillation of sgn(dHdt) was likely that the tolerance for the derivative was set too tight, causing LTspice to over-focus on the exact value of dHdt. This led to repeated attempts, and during these attempts, the sign kept switching frequently.
