GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  NETCHANGE (5)

NAME

netchange - format of netchange files read by irsim.

CONTENTS

Description
Bugs

DESCRIPTION

A netchange file consists of a series of lines, each of which begins with a key letter. The key letter beginning a line determines how the remainder of the line is interpreted. The following are the list of key letters understood.
| any text
  Lines beginning with a vertical bar are treated as comments and ignored by the program.
add type gate source drain length width [area]
  Add a new transistor of type to the network. Currently, type may be:
 
n n-channel enhancement transistor.
p p-channel enhancement transistor.
d depletion transistor (for NMOS).

The names of the nodes to which the gate, source, and drain of the transistor are connected are given by gate, source, and drain respectively. The length and width of the transistor are given by length and width respectively. The area parameter, if given, will use that number as the area for calculating the gate capacitance. Length and width should be given in lambda units, area should be in lambda 2 units, these will internally be multiplied by the LAMBDA factor from the configuration (.prm) file.

delete type gate source drain length width [area]
  Delete an existing transistor from the net. All the parameters have the same meaning as for the add command.
move type gate source drain length width [area] g s d
  Move an existing transistor to a new location the net. type, gate, source, drain, length, width, and area have the same meaning as for the add command. g, s, and d are the names of nodes to which the gate, source and drain should be connected. If a particular terminal(s) is not to be re-connected, the name can be specified using an "*". Any or all of g, s, and d may be "*". For example, to move the gate of an n-channel transistor from node old to new the following command would be used:
                m n old src_node drn_node 4 2.2 new * *
Note that the drain and source terminals, and the g and s terminals are interchangeable; the simulator will know if these are swapped. So the last example could also have been written:
                m n old drn_node src_node 4 2.2 new * *
capacitance node value
  Change the capacitance of a node by value picofarads. Value may be negative, thereby decreasing the node’s capacitance. Node is the node name.
N node metal-area poly-area diff-area diff-perimeter
  Change the capacitance of node using the area and perimeter information of the metal, polysilicon, and diffusion layers. All the parameters should be in lambda (or lambda 2 for areas) units, they will internally be converted to the appropriate capacitance as defined in the configuration file. The values can be negative to decrease the capacitance.
M node M2A M2P MA MP PA PP DA DP PDA PDP
  Change the capacitance of node, using the following geometrical information:

 
M2A area of 2nd-level metal
M2P perimeter of 2nd-level metal
MA area of 1st-level metal
MP perimeter of 1st-level metal
PA area of polysilicon
PP perimeter of polysilicon
DA area of n-diffusion
DP perimeter of n-diffusion
PDA area of p-diffusion
PDP perimeter of p-diffusion

All perimeter values should be in lambda units, area values should be in lambda 2 units. The perimeter measures are half of the actual total perimeter (i.e., they are the sum of the lengths of the top and one side). Again, the values may be negative to decrease the capacitance of the node.

threshold node low high
  Change the threhsold voltages of node. Low and high should be in normalized voltage units (i.e. floating-point numbers in the range 0.0 to 1.0).
Delay node tplh tphl
  Change the delays for node to be tplh nanoseconds for low-to-high transistions, and tphl ns. for high-to-low transistions. These should be absolute numbers, not relative increments/dercrements.
NOTE: For all commands, only the first letter is significant, the rest of the string will be ignored. They are only shown here for clarity.

BUGS

This is an experimental interface for the incremental simulator and is very likely to change in the future.

SEE ALSO

irsim(5) sim(5) presim(1)
Search for    or go to Top of page |  Section 5 |  Main Index


NETCHANGE (5)

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.