LTspice的SIN函數,使用時不知其中Theta值爲何所指,遂查如下:
格式:
Vname n n- SIN (Vo Va freq td theta phi ncycles(LTSPICE only))
Vo is the initial voltage.
初始電壓值(新版本此處已改爲電壓偏移值,其新版初始電壓是初相角處的幅值)
Va is the voltage amplitude.
單邊幅值
freq is the frequency in Hz.
頻率(Hz)
td is the time del.
延時量(s)
theta is the damping factor. This is used to apply an exponential decay to the sinusoid; theta is the decay constant in 1/seconds.
指數衰減常數(1/s)
Theta - 時間遞耗值
此處單位爲秒分之一,數值越大,衰減越快。
phi is the phase advance in degrees. Set this to 90 if you need a cosine wave form.
初相角(單位°)
ncycles is the number of cycles of the pulse that should happen. Leave it as zero if you want ongoing pulses. THIS IS FOR LTSPICE ONLY.
波形週期數,即波形持續的週期的個數