Adam-- Thanks for your help. Could you clarify: What is the "appropriate voltage" on nd_en? Is it 1V for enable and 0V for disable? -----Original Message----- From: Adam.Tambone@xxxxxxxxxxxxxxxxx [mailto:Adam.Tambone@xxxxxxxxxxxxxxxxx] Sent: Friday, August 03, 2001 10:27 AM To: Patrick_Carrier@xxxxxxxxxxxxxxxxx Cc: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: HSpice IBIS Input/Output Buffer syntax Patrick, For I/O buffers used as input buffers connect the 'signal in' to nd_out, tie nd_in to ground via a 0V voltage source, and put the buffer in the disable state with the appropriate voltage on nd_en. For I/O buffers used as output buffers connect 'signal in' to nd_in, and put the buffer in the enable state with the appropriate voltage on nd_en. If you are connecting these buffers as drivers and receivers, connect the transmission line to the output buffer at nd_out and connect it to the input buffer at nd_out also. Adam Tambone Patrick_Carrier@xxxxxxxx@freelists.org on 08/03/2001 11:13:17 AM Please respond to Patrick_Carrier@xxxxxxxx Sent by: si-list-bounce@xxxxxxxxxxxxx To: si-list@xxxxxxxxxxxxx cc: Subject: [SI-LIST] HSpice IBIS Input/Output Buffer syntax I'm assuming someone out there has used an Ibis I/O buffer in HSpice. I was hoping you could clarify something for me: For an input buffer, the node which connects to the circuit is nd_in, which receives the signal sent to the buffer. For an output buffer, the node which connects to the circuit is nd_out, which sends a signal to the rest of the circuit. The output of this node is controlled by nd_in, which is where you connect your pulse voltage source or whatever other stimulus you would like. For an input/output buffer, there is another node called nd_en, to which you must also attach a voltage source. What is this node for? It stands to reason that nd_out is what is connected to the rest of the circuit, which acts as both an input and an output, depending on the state of the buffer, and that nd_in is where you connect your stimulus when the buffer is acting as an output buffer, but what about nd_en? Does this node get the same stimulus as nd_in? Does it just get a 1 or a 0 dependent upon the state of the buffer? I would appreciate any input. Thanks. Patrick Carrier Simulation Engineer - Signal Integrity Group Dell Computer Corporation Patrick_Carrier@xxxxxxxx (512)723-4910 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field 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 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 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