[ibis-macro] Replacing BIRD 122 with "Reserved_Model" keyword in [External Model]
- From: "Walter Katz" <wkatz@xxxxxxxxxx>
- To: "IBIS-ATM" <ibis-macro@xxxxxxxxxxxxx>
- Date: Tue, 17 Jan 2012 16:15:45 -0500 (EST)
All,
I would like to extend BIRD 116 to allow the following for AMI [Model]s
[External Model]
Language ISS
Reserved_Model
AMI_Tstonefile_Tx|AMI_Tstonefile_Rx|AMI_Thevenin_Tx|AMI_Thevenin_Rx
[End External Model]
AMI modeling assumes that a channel can be represented by an Impulse
Response. This implies that AMI modeling assumes a small signal interface
to the analog channel. This also implies that the differential impedance
of a Tx or Rx is constant over the operating range of the device. Note
that any legacy IBIS model (IV, Vt curves, Series Pin), that when used in
the real operating range of a SerDes channel (where AMI modeling is
applicable) can be accurately represented by the following Thevenin Tx and
Rx models.
Reserved_Model AMI_Tstonefile_Tx
[External Model]
Language ISS
Reserved_Model AMI_Tstonefile_Tx
[End External Model]
Is equivalent to:
[External Model]
Language ISS
Corner Typ AMI_Tstonefile_Tx.cir AMI_Tstonefile_Tx
Parameters Tstonefile = AMIfile(Tstonefile) | Tstonefile must be an AMI
Model_Specific parameter
Converter_Parameters Vhi = AMIfile(Voh) | Voh must be an AMI
Model_Specific parameter
Converter_Parameters Vlo = AMIfile(Vol) | Vol is 0 if it is not an AMI
Model_Specific parameter
Converter_Parameters Trf = 1.0ps
Ports my_driveP my_driveN A_signal_pos A_signal_neg
D_to_A D_drive my_driveP 0 Vlo Vhi Trf Trf Typ Non-Inverting
D_to_A D_drive my_driveN 0 Vlo Vhi Trf Trf Typ Inverting
[End External Model]
AMI_Tstonefile_Tx.cir.
.SUBCKT AMI_Tstonefile_Tx my_driveP my_driveN A_signal_pos A_signal_neg
+ Tstonefile="NA.s4p"
Sdriver my_driveP my_driveN A_signal_pos A_signal_neg 0 MNAME=Smodel_name
.MODEL Smodel_name S N=4 TSTONEFILE=Tstonefile
.ends
Reserved_Model AMI_Tstonefile_Rx
[External Model]
Language ISS
Reserved_Model AMI_Tstonefile_Rx
[End External Model]
Is equivalent to:
[External Model]
Language ISS
Corner Typ AMI_Tstonefile_Rx.cir AMI_Tstonefile_Rx
Parameters Tstonefile = AMIfile(Tstonefile)
Ports A_signal_pos A_signal_neg A_int_pos A_int_neg
A_to_D D_receive A_int_pos A_int_neg -.02 .02 Typ
[End External Model]
AMI_Tstonefile_Rx.cir.
.SUBCKT AMI_Tstonefile_Rx A_signal_pos A_signal_neg A_int_pos A_int_neg
+ Tstonefile="NA.s4p"
Sdriver A_signal_pos A_signal_neg A_int_pos A_int_neg 0 MNAME=Smodel_name
.MODEL Smodel_name S N=4 TSTONEFILE=Tstonefile
.ends
Reserved_Model AMI_Thevenin_Tx
[External Model]
Language ISS
Reserved_Model AMI_Thevenin_Tx
[End External Model]
Is equivalent to:
[External Model]
Language ISS
Corner Typ AMI_Thevenin_Tx.cir AMI Thevenin_Tx
Parameters Rt = AMIfile(Rt)
Parameters Rs = AMIfile(Rs)
Parameters Cc = AMIfile(Cc)
Parameters Vt = AMIfile(Vt)
Parameters Cac = AMIfile(Cac)
Parameters Rac = AMIfile(Rac)
Parameters Rd = AMIfile(Rd)
Parameters Cd = AMIfile(Cd)
Parameters Trf = AMIfile(Trf)
| Only AMI Model_Specific parameters Rt Rs Cc Vt Cac Rac Rd Cd defined in
the
| .ami file shall be passed as parameters to the subckt AMI Thevenin_Tx
instance
Converter_Parameters Vhi = AMIfile(Voh) | Voh must be an AMI
Model_Specific parameter
Converter_Parameters Vlo = AMIfile(Vol) | Vol is 0 if it is not an AMI
Model_Specific parameter
Converter_Parameters Trf = AMIfile(Trf) | Trf is 1p if it is not an AMI
Model_Specific parameter
Ports my_driveP my_driveN A_signal_pos A_signal_neg
D_to_A D_drive my_driveP 0 Vlo Vhi Trf Trf Typ Non-Inverting
D_to_A D_drive my_driveN 0 Vlo Vhi Trf Trf Typ Inverting
[End External Model]
AMI_Thevenin_Tx.cir
.SUBCKT AMI_Thevenin_Tx my_driveP my_driveN A_signal_pos A_signal_neg
+ Rt=1Meg Rs=1Meg Cc=0. Vt=0. Cac=0. Rac=1Meg Rd=1Meg Cd=0.
E_H E_my_driveP 0 VCVS my_driveP 0 1.
E_L E_my_driveN 0 VCVS my_driveN 0 1.
R_Rs_H E_my_driveP A_signal_pos R='Rs'
R_Rs_L E_my_driveN A_signal_neg R='Rs'
R_Rd A_signal_pos A_signal_neg R='Rd'
C_Rd A_signal_pos A_signal_neg C='Cd'
R_Rt_H A_signal_pos Vt R='Rt'
R_Rt_H A_signal_neg Vt R='Rt'
V_Vt Vt 0 DC='Vt'
C_Cc_H A_signal_pos 0 C='Cc'
C_CC_L A_signal_neg 0 C='Cc'
R_ac A_signal_pos Nac R='Rac'
C_ac A_signal_neg Nac C='Cac'
.ends
Reserved_Model AMI_Thevenin_Rx
[External Model]
Language ISS
Reserved_Model AMI_Thevenin_Rx
[End External Model]
Is equivalent to:
[External Model]
Language ISS
Corner Typ AMI_Thevenin_Rx.cir AMI_Thevenin_Rx
Parameters Rt = AMIfile(Rt)
Parameters Cc = AMIfile(Cc)
Parameters Vt = AMIfile(Vt)
Parameters Cac = AMIfile(Cac)
Parameters Rac = AMIfile(Rac)
Parameters Rd = AMIfile(Rd)
Parameters Cd = AMIfile(Cd)
|Only AMI Model_Specific parameters Rt Cc Vt Cac Rac Rd Cd defined in the
|.ami file shall be passed as parameters to the subckt AMI Thevenin_Tx
instance
Ports A_signal_pos A_signal_neg A_int_pos A_int_neg
A_to_D D_receive A_int_pos A_int_neg -.02 .02 Typ
[End External Model]
[External Model]
AMI_Thevenin_Rx.cir.
.subckt AMI_Thevenin_Rx A_signal_pos A_signal_neg A_int_pos A_int_neg
+ Rt=1Meg Cc=0. Vt=0. Cac=0. Rac=1Meg Rd=1Meg Cd=0.
E_H A_int_pos 0 VCVS A_signal_pos 0 1.
E_L A_int_neg 0 VCVS A_signal_neg 0 1.
R_Rd A_signal_pos A_signal_neg R='Rd'
C_Rd A_signal_pos A_signal_neg C='Cd'
R_Rt_H A_signal_pos Vt R='Rt'
R_Rt_H A_signal_neg Vt R='Rt'
V_Vt Vt 0 DC='Vt'
C_Cc_H A_signal_pos 0 C='Cc'
C_CC_L A_signal_neg 0 C='Cc'
R_ac A_signal_pos Nac R='Rac'
C_ac A_signal_neg Nac C='Cac'
.ends
Walter Katz
<mailto:wkatz@xxxxxxxxxx> wkatz@xxxxxxxxxx
Phone 303.449-2308
Mobile 720.333-1107
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