increasing number of frequency digits in AC analysis in spice 2G6

Mar 05, 2007 4 Replies

I'm trying to increase the number of digits in the _frequency column_ of an ac-analysis like this: .options numdgt=7 unfortunately this does only increase the number of digits in the "voltage (and current) columns" , the frequency column however is unaffected.



e.g.



1.122E-02 -2.153112E-02

in which the first value represents the frequency and the second a voltage Can anyone tell me how to make spice 2g6 to generate more digits for the first value?



hugo



In the .AC analysis specify finer steps.

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

I tried this but it doesn't help as Spice just begins to repeat frequency values in stead of refining them e.g. 1.006E+01 -3.601257E+01 1.006E+01 -3.601690E+01 1.007E+01 -3.602124E+01 1.007E+01 -3.602557E+01 1.008E+01 -3.602991E+01 1.008E+01 -3.603424E+01 1.009E+01 -3.603856E+01 1.009E+01 -3.604289E+01

regards, hugo

Maybe it's 2G6. In PSpice, with 101 Points per Decade, I'm getting

*15* place accuracy for Frequency.

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

yes, it is 2G6 I am using, it seems hard to believe it is not possible to increase the number of digits in the frequency column. Is this a bug? Or is there a workaround (except using PSpice of course) regards, Hugo b.t.w. Spice 3F _does_ give 7 digits for the frequency

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