eldo_user

Specifying Simulation Output
Examples of Defining Waveforms
v1 in out ...
*...
.defwave power_vdd=i(v1)*v(v1)
• The waveform expression must consist of waves and functions which are related to the
type of analysis being performed as described in the .PLOT/PRINT commands. The
following is illegal and will produce false results:
.defwave amplification=v(2)/v(1)
*...
.plot ac w(amplification)
However, the following is allowed:
.defwave amplification=vm(2)/vm(1)
*...
.plot ac wdb(amplification)
• The waveform expression may use the result of some extracts from a sweep analysis
through direct reference to the label holding the result or use of the EXTRACT()
accessor function. The following is allowed:
.extract label=m1 yval(v(1),5n)
.defwave tran foo=v(1)+extract(m1) ! using the accessor function
.extract sweep label=m2 min(extract(m1))
.extract sweep label=m3 yval(extract(m1),2.5)
The following alternative is also allowed:
.extract label=m1 yval(v(1),5n)
.defwave tran foo=v(1)+m1 ! direct reference to the extract label
.extract sweep label=m2 min(m1)
.extract sweep label=m3 yval(m1,2.5)
• The PWL function in .DEFWAVE can not be used in complex expressions. An error
will be generated if the .DEFWAVE uses the function with other operators or
mathematical functions. The following is not accepted:
.defwave tran f1 = 1 + pwl(5n,0,7n,5,8n,5,9n,1)
However, the following is allowed:
.defwave tran f1 = pwl(5n,0,7n,5,8n,5,9n,1)
Examples of Defining Waveforms
Plot the AC power of the vxx voltage source:
.defwave powf = 0.5*(vdip(vxx) * CONJ(I(vxx)))
.plot ac wr(powf)
Example of applying a wave operator:
Eldo® User's Manual, 15.3 337