Pattern Source
high, low가 일정하게 반복되는 clock signal이 아닌 signal을 정의 할때 힘들게 pwl을 사용하지 말자.
여기 pattern source가 있다.
*** syntax
Vxxx n+ n- PAT <(> vhi vlo td tr tf tsample data + <)>
Ixxx n+ n- PAT <(> vhi vlo td tr tf tsample data + <)>
*** description
PAT : Keyword for a pattern time-varying source.
vhi : High voltage or current value for pattern sources (units of volts or amps).
vlo : Low voltage or current value for pattern sources (units of volts or amps).
td : Delay (propagation) time in seconds from the beginning of the transient interval to the first onset ramp.
tr : Duration of the onset ramp (in seconds) from the low value to the high value (reverse transit time).
tf : Duration of the recovery ramp (in seconds) from the high value back to the low value (forward transit time).
tsample : Time spent at '0' or '1' or 'M' or 'Z' pattern value (in seconds).
data : String of '1' ,'0','M', 'Z' representing a pattern source.
The first alphabet must be 'B', which represents it is a binary bit stream.
This series is called b-string.
'1' represents the high voltage or current value,
'0' is the low voltage or current value,
'M' represents the value which is equal to 0.5*(vhi+vlo).
'Z' represents the high impedance state (only for voltage source).
RB : Keyword to specify the starting bit when repeating.
R=repeat : Keyword to specify how many times to execute the repeating operation be executed.
With no argument, the source repeats from the beginning of the b-string.
If R=-1, it means the repeating operation will continue forever.
*** Example input file
*** result
