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--- language:langs:sizing [2021/03/05 14:38]
ole [P/N ratios]
+++ language:langs:sizing [2021/03/07 07:30]
rajit [P/N ratios]
@@ Line 116: / Line 116: @@
 ===== P/N ratios =====
-for state holding gates you want to have a different ratio between P and N compared to normal logic gates, to use the optimal ratio.
+The default sizing equalizes drive strengths for the pull-up and pull-down network. For gates used in cyclic control logic in asynchronous design, the optimal drive strengths are different. To use the optimal ratio, you can add:
-for this you can add:
 <code>
@@ Line 126: / Line 124: @@
 }
 sizing {
-  p_n_mode <- 1;
+  p_n_mode <- 1; /* this modifies the sizing */
   out {-1}
 }
 </code>
-that produces a different ratio:
+The ratio will be computed using parameters in the netlist section of the ACT [[config:netlist|configuration]] file.
-<code>
-  prs {
-      ~in[0]<20> & ~in[1]<20> -> out-
-      ~in[0]<30> & ~in[1]<30>  -> out+
-  }
-</code>