Spice - pomoc

[Kamil Rezac]

Preji co nejmene neprijemne pondelni pracovni rano... :)

O vikendu jsem si zkousel hrat se simulatorem Spice Opus a pro
zajimavost jsem do nej prepsal dva low-pass filtry, ktere pouzivame na
robotovi (senzory) a skutecne funguji. Ovsem v simulatoru mi jeden z
nich (filtr_bad.cir, viz priloha) pri TRAN analyze vytvori
nekolikasetvoltovy bordel (AC analyza je u obou v poradku). Oba filtry
se lisi jen hodnotami soucastek (FilterLab navrh), v popisu schematu
chyba neni (kdyz hodnoty z _bad prepisu na hodnoty z _ok, tak to zase
chodi dobre). Muzete mi nekdo zkusenejsi poradit, v cem je zrada?

Predem dik za rady
KR
------------- další část ---------------
Accelerometer input filter and amplifier
*
* SINGLE-POLE OPERATIONAL AMPLIFIER MACRO-MODEL
* connections:      non-inverting input
*                   |   inverting input
*                   |   |   output
*                   |   |   |
.SUBCKT OPAMP1      1   2   6
* INPUT IMPEDANCE
RIN     1          2          10MEG
* DC GAIN (100K) AND POLE 1 (100HZ)
EP1	3 0	1 2	100K
RP1	3	4	1K
CP1	4	0	1.5915UF
* OUTPUT BUFFER AND RESISTANCE
EOUT	5 0	4 0	1
ROUT	5	6	10
.ENDS
*
*
* Circuit
*
Vin   1 0 AC  1 pulse(0 1 0 1ms 1ms 1ms ) 

* Laser filter

R31    1  31  5.1k
R32   31  32  16k
C31   32   0  100n
C32   31  33  150n
XOP31 32  34  33  OPAMP1
R33   34   0  10k
R34   34  33  8.2k
R35   33  35  3.3k
R36   35  36  9.1k
C33   36  0   100n
C34   35  37  330n
XOP32 36  37  37  OPAMP1



.control

*ac lin 100 0.01 5k
*plot vm(37)
tran 0.001ms 10ms
plot vm(37) vm(1)

.endc
.end


------------- další část ---------------
Accelerometer input filter and amplifier
*
* SINGLE-POLE OPERATIONAL AMPLIFIER MACRO-MODEL
* connections:      non-inverting input
*                   |   inverting input
*                   |   |   output
*                   |   |   |
.SUBCKT OPAMP1      1   2   6
* INPUT IMPEDANCE
RIN     1          2          10MEG
* DC GAIN (100K) AND POLE 1 (100HZ)
EP1	3 0	1 2	100K
RP1	3	4	1K
CP1	4	0	1.5915UF
* OUTPUT BUFFER AND RESISTANCE
EOUT	5 0	4 0	1
ROUT	5	6	10
.ENDS
*
*
* Circuit
*
Vin   1 0 AC  1 pulse(0 1 0 1ms 1ms 1ms ) 

* Laser filter

R31    1  31  5.6k
R32   31  32  7.5k
C31   32   0  47n
C32   31  33  330n
XOP31 32  34  33  OPAMP1
R33   34   0  10k
R34   34  33  8.2k
R35   33  35  15k
R36   35  36  18k
C33   36  0   47n
C34   35  37  56n
XOP32 36  37  37  OPAMP1



.control

*ac lin 100 0.01 5k
*plot vm(37)
tran 0.001ms 10ms
plot vm(37) vm(1)

.endc
.end