The Museum of HP Calculators

Butterworth or Chebyshev Filter Design Output for the HP-41C/CV/CX

This program is Copyright © HP and is used here by permission. It was originally printed in the HP-67 E.E. Pac 1. This program was ported to the HP-41C by reading with the HP-41C card reader and the card reader may be required for operation of this program. This program was entered and uploaded by Tony Duell.

This program is supplied without representation or warranty of any kind. Tony Duell, Hewlett Packard and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or otherwise, of any kind arising from the use of this program material or any part thereof.

Documentation Information (CD or source code)
How to get this Program to your Calculator (via HP-IL, disk, wand, and fingers)
Download Binary (.raw) program for disk or PC HP-IL Card download
Download Hexadecimal (.dat) program for Serial Port download

Program Listing

LINE  KEYS
 01 LBL "BCF67O"
 02 LBL 14
 03 LBL E
 04 RCL 24
 05 STO 25
 06 SF 01
 07 LBL 08
 08 RCL 24
 09 RCL 25
 10 -
 11 1
 12 +
 13 STO 09
 14 2
 15 *
 16 1
 17 -
 18 PI
 19 *
 20 2
 21 /
 22 RCL 24
 23 /
 24 SIN
 25 2
 26 *
 27 LBL 09
 28 STO 20
 29 RCL 05
 30 1-
 31 RCL 09
 32 XEQ 05
 33 Y^X
 34 Y^X
 35 *
 36 RCL 23
 37 X<> 25
 38 7GTOI
 39 LBL 01
 40 X<> 25
 41 RDN
 42 RCL 07
 43 /
 44 XEQ 06
 45 GTO 00
 46 LBL 02
 47 X<> 25
 48 RDN
 49 RCL 07
 50 *
 51 1/X
 52 XEQ 06
 53 CHS
 54 GTO 00
 55 LBL 03
 56 X<> 25
 57 RDN
 58 RCL 08
 59 /
 60 XEQ 06
 61 XEQ 05
 62 LASTX
 63 /
 64 1/X
 65 RCL 07
 66 X^2
 67 /
 68 XEQ 06
 69 CHS
 70 GTO 00
 71 LBL 04
 72 X<> 25
 73 RDN
 74 RCL 08
 75 *
 76 RCL 07
 77 X^2
 78 /
 79 XEQ 06
 80 XEQ 05
 81 LASTX
 82 /
 83 RCL 07
 84 X^2
 85 *
 86 1/X
 87 XEQ 06
 88 CHS
 89 LBL 00
 90 XEQ 05
 91 FS? 00
 92 ADV
 93 FS? 01
 94 GTO 01
 95 7DSZ
 96 GTO 07
 97 RTN
 98 LBL 01
 99 7DSZ
100 GTO 08
101 RTN
102 LBL 06
103 1-
104 RCL 09
105 Y^X
106 *
107 RTN
108 LBL 13
109 LBL D
110 1
111 STO 09
112 CF 01
113 RCL 04
114 40
115 /
116 1
117 E^X
118 LOG
119 /
120 ENTER
121 +
122 E^X
123 1
124 X<>Y
125 +
126 LASTX
127 1
128 -
129 /
130 RCL 24
131 STO 25
132 2
133 *
134 1/X
135 Y^X
136 ENTER
137 1/X
138 -
139 2
140 /
141 X^2
142 STO 22
143 PI
144 2
145 /
146 RCL 24
147 /
148 SIN
149 STO 21
150 2
151 *
152 RCL 22
153 SQRT
154 /
155 GTO 09
156 LBL 07
157 RCL 21
158 RCL 24
159 RCL 25
160 -
161 1
162 +
163 STO 09
164 1
165 -
166 2
167 *
168 1
169 +
170 PI
171 *
172 2
173 /
174 RCL 24
175 /
176 SIN
177 STO 21
178 *
179 4
180 *
181 RCL 20
182 /
183 RCL 22
184 RCL 24
185 RCL 25
186 -
187 PI
188 *
189 RCL 24
190 /
191 SIN
192 X^2
193 +
194 /
195 GTO 09
196 LBL 05
197 FS? 00
198 7PRTX
199 FS? 00
200 RTN
201 STOP
202 RTN
203 STOP
204 END

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