Shown below is a netlist utilizing the B-Element as a I/O buffer in HSPICE. Note the keyword 'Ramp' specific to the B-Element. Ramp = 0 will take edge rate information from the Ramp data in the IBIS datasheet, Ramp = 1 will use the first Rising and Falling Waveforms in the IBIS datasheet, and Ramp = 2 will utilize two Rising and Falling Waveforms for edge rate and shape information. Rgds, Adam Tambone ********************************************************** * * * lvx3245 5V Vcc B pin I/O * * * by Adam Tambone * * August, 2001 ********************************************************** .option post probe + d_ibis='/home/atambone/aa_ibis_testing/lvx_test_environments/' ********************************************************** * Analysis and Stimuli ********************************************************** * 20MHz V_in20 nd_in 0 3.3V pulse ( 0V 3.3V 1n 2n 2n 23n 50n ) .tran 0.02n 51n * 33MHz *V_in33 nd_in 0 3.3V pulse ( 0V 3.3V 1n 2n 2n 13.15n 30.303n ) *.tran 0.02n 32n * 66MHz *V_in66 nd_in 0 3.3V pulse ( 0V 3.3V 1n 2n 2n 5.7575n 15.515n ) *.tran 0.02n 17n * 100MHz *V_in100 nd_in 0 3.3V pulse ( 0V 3.3V 1n 2n 2n 3n 10n ) *.tran 0.02n 11n ********************************************************** * LOAD ********************************************************** * vinr needed for i/o buffer acting as input buffer VINR nd_in2 0 DC 0 Vend nd_en 0 dc 0 Venr nd_en2 0 dc 0 ********************************************************** * Output ********************************************************** .plot tran * driver + v(nd_out) v(nd_in) * receiver + v(nd_out2) *+ i1(rt) i2(rt) ********************************************************** * DRIVER OUTPUT BUFFERS ********************************************************** b_io nd_pu nd_pd nd_out nd_in nd_en v_out_of_in [nd_pc nd_gc] + file = 'lvx3245mtc.ibs' + model = 'data_io_b' + ramp_rwf = 2 + ramp_fwf = 2 *+ fwf_tune = 1.0 ********************************************************** * RECEIVER INPUT BUFFERS ********************************************************** b_rcvr nd_pu2 nd_pd2 nd_out2 nd_in2 nd_en2 v_out_of_in2 [nd_pc2 nd_gc2] + file = 'lvx3245mtc.ibs' + model = 'data_io_b' + ramp_rwf = 2 + ramp_fwf = 2 ********************************************************** * TRANSMISSION LINE ********************************************************** T1 nd_out 0 nd_out2 0 Z0=50 TD=1.0n L=0.3048 * different lengths *L=0.1524 *L=0.3048 *L=0.6096 .end "Ingraham, Andrew" <Andrew.Ingraham@xxxxxxxxxx>@freelists.org on 01/25/2002 08:18:04 AM Please respond to Andrew.Ingraham@xxxxxxxxxx Sent by: si-list-bounce@xxxxxxxxxxxxx To: <si-list@xxxxxxxxxxxxx> cc: Subject: [SI-LIST] Re: Hspice B element > --------------- > * > * > * > ----------------- > for the hspice output and >=20 > -------------- > * > * > * > ------------------------ > for the IBIS output. >=20 > What could I be doing wrong here? Any inputs will be appreciated. >=20 >=20 Some things to check: Is the B-element connected correctly? Are you using the right B-element node for connection to the rest of your circuit? What is the load? Double-check the units in the IBIS datasheet file ("model"). Is the risetime the only difference, or are the initial and final voltage levels wrong too? Regards, Andy ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu