spice.txt

spice中支持多层次元件模型仿真的可单独运行的插件源码

TEXT: H
TEXT: H CAP = CJ (LENGTH - NARROW) (WIDTH - NARROW) + 2 CJSW (LENGTH + WIDTH - 2 NARROW)
TEXT: H
TEXT: H

SUBJECT: Inductors
TITLE: Inductors
TEXT: H
TEXT: H _3._1._7.  _I_n_d_u_c_t_o_r_s
TEXT: H
TEXT: H _G_e_n_e_r_a_l _f_o_r_m:
TEXT: H
TEXT: H     LYYYYYYY N+ N- VALUE <IC=INCOND>
TEXT: H
TEXT: H
TEXT: H _E_x_a_m_p_l_e_s:
TEXT: H
TEXT: H     LLINK 42 69 1UH
TEXT: H     LSHUNT 23 51 10U IC=15.7MA
TEXT: H
TEXT: H
TEXT: H      N+ and N- are the  positive  and  negative  element
TEXT: H nodes,  respectively.   VALUE  is the inductance in Hen-
TEXT: H ries.
TEXT: H
TEXT: H
TEXT: H      The (optional) initial condition is the initial  (time-
TEXT: H zero)  value  of  inductor current (in Amps) that flows from
TEXT: H N+, through the inductor, to N-.  Note that the initial con-
TEXT: H ditions  (if  any) apply only if the UIC option is specified
TEXT: H on the .TRAN analysis line.
TEXT: H
TEXT: H

SUBJECT: Coupled Inductors
TITLE: Coupled (Mutual) Inductors
TEXT: H
TEXT: H _3._1._8.  _C_o_u_p_l_e_d (_M_u_t_u_a_l) _I_n_d_u_c_t_o_r_s
TEXT: H
TEXT: H _G_e_n_e_r_a_l _f_o_r_m:
TEXT: H
TEXT: H     KXXXXXXX LYYYYYYY LZZZZZZZ VALUE
TEXT: H
TEXT: H
TEXT: H _E_x_a_m_p_l_e_s:
TEXT: H
TEXT: H     K43 LAA LBB 0.999
TEXT: H     KXFRMR L1 L2 0.87
TEXT: H
TEXT: H
TEXT: H      LYYYYYYY and LZZZZZZZ are the names of the two cou-
TEXT: H pled  inductors,  and  VALUE  is the coefficient of cou-
TEXT: H pling, K, which must be greater than 0 and less than  or
TEXT: H equal  to  1.  Using the 'dot' convention, place a 'dot'
TEXT: H on the first node of each inductor.
TEXT: H
TEXT: H
TEXT: H

SUBJECT: Switches
TITLE: Switches
TEXT: H
TEXT: H _3._1._9.  _S_w_i_t_c_h_e_s
TEXT: H
TEXT: H _G_e_n_e_r_a_l _f_o_r_m:
TEXT: H
TEXT: H     SXXXXXXX N+ N- NC+ NC- MODEL <ON><OFF>
TEXT: H     WYYYYYYY N+ N- VNAM MODEL <ON><OFF>
TEXT: H
TEXT: H
TEXT: H _E_x_a_m_p_l_e_s:
TEXT: H
TEXT: H     s1 1 2 3 4 switch1 ON
TEXT: H     s2 5 6 3 0 sm2 off
TEXT: H     Switch1 1 2 10 0 smodel1
TEXT: H     w1 1 2 vclock switchmod1
TEXT: H     W2 3 0 vramp sm1 ON
TEXT: H     wreset 5 6 vclck lossyswitch OFF
TEXT: H
TEXT: H
TEXT: H      Nodes 1 and 2  are  the  nodes  between  which  the
TEXT: H switch  terminals are connected.  The model name is man-
TEXT: H datory while the initial conditions are  optional.   For
TEXT: H the voltage controlled switch, nodes 3 and 4 are the po-
TEXT: H sitive and negative controlling nodes respectively.  For
TEXT: H the  current  controlled switch, the controlling current
TEXT: H is that  through  the  specified  voltage  source.   The
TEXT: H direction  of  positive controlling current flow is from
TEXT: H the positive node, through the source, to  the  negative
TEXT: H node.
TEXT: H
TEXT: H
TEXT: H

SUBJECT: Switch Model 
TITLE: Switch Model (SW/CSW)
TEXT: H
TEXT: H _3._1._1_0.  _S_w_i_t_c_h _M_o_d_e_l (_S_W/_C_S_W)
TEXT: H
TEXT: H
TEXT: H      The switch model allows an almost ideal  switch  to  be
TEXT: H described  in SPICE.  The switch is not quite ideal, in that
TEXT: H the resistance can not change from 0 to infinity,  but  must
TEXT: H always have a finite positive value.  By proper selection of
TEXT: H the on and off resistances, they can be effectively zero and
TEXT: H infinity  in  comparison  to  other  circuit  elements.  The
TEXT: H parameters available are:
TEXT: H
TEXT: H     name   parameter            units   default   switch
TEXT: H
TEXT: H     VT     threshold voltage    Volts   0.0       S
TEXT: H     IT     threshold current    Amps    0.0       W
TEXT: H     VH     hysteresis voltage   Volts   0.0       S
TEXT: H     IH     hysteresis current   Amps    0.0       W
TEXT: H     RON    on resistance        Z       1.0       both
TEXT: H     ROFF   off resistance       Z       1/GMIN*   both
TEXT: H
TEXT: H
TEXT: H
TEXT: H
TEXT: H      *(See the .OPTIONS control line for  a  description  of
TEXT: H GMIN,  its  default  value  results  in an off-resistance of
TEXT: H 1.0e+12 ohms.)
TEXT: H
TEXT: H
TEXT: H      The use of an ideal element that  is  highly  nonlinear
TEXT: H such as a switch can cause large discontinuities to occur in
TEXT: H the circuit node voltages.  A  rapid  change  such  as  that
TEXT: H associated  with a switch changing state can cause numerical
TEXT: H roundoff or tolerance problems leading to erroneous  results
TEXT: H or  timestep difficulties.  The user of switches can improve
TEXT: H the situation by taking the following steps:
TEXT: H
TEXT: H      First, it is wise to set ideal switch  impedances  just
TEXT: H high  or  low  enough to be negligible with respect to other
TEXT: H circuit elements.  Using switch impedances that are close to
TEXT: H "ideal"  in all cases aggravates the problem of discontinui-
TEXT: H ties mentioned above.  Of course, when modeling real devices
TEXT: H such  as  MOSFETS, the on resistance should be adjusted to a
TEXT: H realistic level depending on the size of  the  device  being
TEXT: H modeled.
TEXT: H
TEXT: H      If a wide range of ON to OFF resistance must be used in
TEXT: H the switches (ROFF/RON >1e+12), then the tolerance on errors
TEXT: H allowed during transient analysis  should  be  decreased  by
TEXT: H using  the  .OPTIONS control line and specifying TRTOL to be
TEXT: H less than the default  value  of  7.0.   When  switches  are
TEXT: H placed around capacitors, then the option CHGTOL should also
TEXT: H be reduced.  Suggested values for these two options are  1.0
TEXT: H and  1e-16  respectively.  These changes inform SPICE3 to be
TEXT: H more careful around the switch points so that no errors  are
TEXT: H made due to the rapid change in the circuit.
TEXT: H

SUBJECT: VOLTAGE AND CURRENT SOURCES
TITLE: VOLTAGE AND CURRENT SOURCES
TEXT: H
TEXT: H _3._2.  _V_O_L_T_A_G_E _A_N_D _C_U_R_R_E_N_T _S_O_U_R_C_E_S
TEXT: H
SUBTOPIC: SPICE:Independent Sources
SUBTOPIC: SPICE:Linear Dependent Sources
SUBTOPIC: SPICE:Nonlinear Dependent Sources

SUBJECT: Independent Sources
TITLE: Independent Sources
TEXT: H
TEXT: H _3._2._1.  _I_n_d_e_p_e_n_d_e_n_t _S_o_u_r_c_e_s
TEXT: H
TEXT: H _G_e_n_e_r_a_l _f_o_r_m:
TEXT: H
TEXT: H     VXXXXXXX N+ N- <<DC> DC/TRAN VALUE> <AC <ACMAG <ACPHASE>>>
TEXT: H     +       <DISTOF1 <F1MAG <F1PHASE>>> <DISTOF2 <F2MAG <F2PHASE>>>
TEXT: H     IYYYYYYY N+ N- <<DC> DC/TRAN VALUE> <AC <ACMAG <ACPHASE>>>
TEXT: H     +       <DISTOF1 <F1MAG <F1PHASE>>> <DISTOF2 <F2MAG <F2PHASE>>>
TEXT: H
TEXT: H
TEXT: H _E_x_a_m_p_l_e_s:
TEXT: H
TEXT: H     VCC 10 0 DC 6
TEXT: H     VIN 13 2 0.001 AC 1 SIN(0 1 1MEG)
TEXT: H     ISRC 23 21 AC 0.333 45.0 SFFM(0 1 10K 5 1K)
TEXT: H     VMEAS 12 9
TEXT: H     VCARRIER 1 0 DISTOF1 0.1 -90.0
TEXT: H     VMODULATOR 2 0 DISTOF2 0.01
TEXT: H     IIN1 1 5 AC 1 DISTOF1 DISTOF2 0.001
TEXT: H
TEXT: H
TEXT: H      N+ and N- are the positive and negative nodes,  respec-
TEXT: H tively.   Note  that  voltage  sources need not be grounded.
TEXT: H Positive current is assumed to flow from the positive  node,
TEXT: H through  the source, to the negative node.  A current source
TEXT: H of positive value forces current to flow out of the N+ node,
TEXT: H through  the source, and into the N- node.  Voltage sources,
TEXT: H in addition to being used for circuit  excitation,  are  the
TEXT: H 'ammeters'  for  SPICE, that is, zero valued voltage sources
TEXT: H may be inserted into the circuit for the purpose of  measur-
TEXT: H ing  current.   They  of  course  have  no effect on circuit
TEXT: H operation since they represent short-circuits.
TEXT: H
TEXT: H
TEXT: H      DC/TRAN is the dc and transient analysis value  of  the
TEXT: H source.   If  the source value is zero both for dc and tran-
TEXT: H sient analyses, this value may be omitted.   If  the  source
TEXT: H value  is  time-invariant  (e.g.,  a power supply), then the
TEXT: H value may optionally be preceded by the letters DC.
TEXT: H
TEXT: H
TEXT: H      ACMAG is the ac magnitude and ACPHASE is the ac  phase.
TEXT: H The  source  is  set  to  this value in the ac analysis.  If
TEXT: H ACMAG is omitted following the keyword AC, a value of  unity
TEXT: H is  assumed.   If  ACPHASE  is  omitted,  a value of zero is
TEXT: H assumed.  If the source is not an ac small-signal input, the
TEXT: H keyword AC and the ac values are omitted.
TEXT: H
TEXT: H
TEXT: H      DISTOF1 and DISTOF2 are the keywords that specify  that
TEXT: H the independent source has distortion inputs at the frequen-
TEXT: H cies F1 and F2 respectively  (see  the  description  of  the
TEXT: H .DISTO  control  line).   The keywords may be followed by an
TEXT: H optional magnitude and phase.  The  default  values  of  the
TEXT: H magnitude and phase are 1.0 and 0.0 respectively.
TEXT: H
TEXT: H
TEXT: H      Any independent source can be assigned a time-dependent
TEXT: H value  for  transient  analysis.   If a source is assigned a
TEXT: H time-dependent value, the time-zero value  is  used  for  dc
TEXT: H analysis.   There  are  five  independent  source functions:
TEXT: H pulse,  exponential,  sinusoidal,  piece-wise  linear,   and
TEXT: H single-frequency FM.  If parameters other than source values
TEXT: H are omitted or set to zero, the  default  values  shown  are
TEXT: H assumed.   (TSTEP is the printing increment and TSTOP is the
TEXT: H final time (see the .TRAN control line for explanation)).
TEXT: H
TEXT: H
SUBTOPIC: SPICE:Pulse
SUBTOPIC: SPICE:Sinusoidal
SUBTOPIC: SPICE:Exponential
SUBTOPIC: SPICE:PieceWise Linear
SUBTOPIC: SPICE:SingleFrequency FM

SUBJECT: Pulse
TITLE: Pulse
TEXT: H
TEXT: H _3._2._1._1.  _P_u_l_s_e
TEXT: H
TEXT: H _G_e_n_e_r_a_l _f_o_r_m:
TEXT: H
TEXT: H     PULSE(V1 V2 TD TR TF PW PER)
TEXT: H
TEXT: H
TEXT: H _E_x_a_m_p_l_e_s:
TEXT: H
TEXT: H     VIN 3 0 PULSE(-1 1 2NS 2NS 2NS 50NS 100NS)
TEXT: H
TEXT: H
TEXT: H
TEXT: H      parameter               default value         units
TEXT: H      -----------------------------------------------------
TEXT: H      V1 (initial value)                      Volts or Amps
TEXT: H      V2 (pulsed value)                       Volts or Amps
TEXT: H      TD (delay time)         0.0             seconds
TEXT: H      TR (rise time)          TSTEP           seconds
TEXT: H      TF (fall time)          TSTEP           seconds
TEXT: H      PW (pulse width)        TSTOP           seconds
TEXT: H      PER(period)             TSTOP           seconds
TEXT: H
TEXT: H
TEXT: H
TEXT: H
TEXT: H
TEXT: H      A single pulse so specified is described by the follow-
TEXT: H ing table:
TEXT: H
TEXT: H
TEXT: H
TEXT: H      time          value
TEXT: H      -------------------
TEXT: H      0             V1
TEXT: H      TD            V1
TEXT: H      TD+TR         V2
TEXT: H      TD+TR+PW      V2
TEXT: H      TD+TR+PW+TF   V1
TEXT: H      TSTOP         V1
TEXT: H
TEXT: H
TEXT: H
TEXT: H
TEXT: H      Intermediate points are determined by linear interpola-
TEXT: H tion.
TEXT: H
TEXT: H

SUBJECT: Sinusoidal
TITLE: Sinusoidal
TEXT: H
TEXT: H _3._2._1._2.  _S_i_n_u_s_o_i_d_a_l
TEXT: H
TEXT: H _G_e_n_e_r_a_l _f_o_r_m:
TEXT: H
TEXT: H     SIN(VO VA FREQ TD THETA)
TEXT: H
TEXT: H
TEXT: H _E_x_a_m_p_l_e_s:
TEXT: H
TEXT: H     VIN 3 0 SIN(0 1 100MEG 1NS 1E10)
TEXT: H
TEXT: H
TEXT: H
TEXT: H
TEXT: H
TEXT: H
TEXT: H      parameters                default value   units
TEXT: H      -------------------------------------------------------
TEXT: H      VO     (offset)                           Volts or Amps
TEXT: H      VA     (amplitude)                        Volts or Amps
TEXT: H      FREQ   (frequency)        1/TSTOP         Hz
TEXT: H      TD     (delay)            0.0             seconds
TEXT: H      THETA  (damping factor)   0.0             1/seconds
TEXT: H
TEXT: H
TEXT: H
TEXT: H
TEXT: H
TEXT: H      The shape of the waveform is described by the following
TEXT: H table:
TEXT: H
TEXT: H
TEXT: H      time          value
TEXT: H      ------------------------------------------------------------
TEXT: H      0 to TD       VO
TEXT: H                             -(t - TD)THETA
TEXT: H      TD to TSTOP   VO + VA e               sin(2 J FREQ (t + TD))