From 4baa8b0dcf8ab8db370622ee619ee0e89b014ba4 Mon Sep 17 00:00:00 2001
From: pnenzi <pnenzi>
Date: Sun, 25 Nov 2001 18:28:20 +0000
Subject: [PATCH] Applied patch from Richard McRoberts: A bug that most users
 probably wouldn't encounter occurs in an ac analysis using a linear sweep
 with only one point. A rather pathological case.) The original code in acan.c
 uses a frequency ncrement of "HUGE" (infinity) which causes a crash when
 stepping to the second point. Fixed by making the increment zero, which is
 tested for in the sweep, ausing it to terminate correctly after the first
 point.

---
 src/spicelib/analysis/acan.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/spicelib/analysis/acan.c b/src/spicelib/analysis/acan.c
index d7da5bab6..bcaa5113b 100644
--- a/src/spicelib/analysis/acan.c
+++ b/src/spicelib/analysis/acan.c
@@ -54,7 +54,10 @@ ACan(CKTcircuit *ckt, int restart)
                     ((ACAN*)ckt->CKTcurJob)->ACstartFreq)/
                     (((ACAN*)ckt->CKTcurJob)->ACnumberSteps-1);
 	    else
-		((ACAN*)ckt->CKTcurJob)->ACfreqDelta = HUGE;
+		/* Patch from: Richard McRoberts
+		 * This patch is for a rather pathological case:
+		 * a linear step with only one point */
+		((ACAN*)ckt->CKTcurJob)->ACfreqDelta = 0; 
             break;
         default:
             return(E_BADPARM);