The Museum of HP Calculators


Bode Plot of Butterworth and Chebyshev Filters 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 "BPBC67"
 02 LBL 15
 03 LBL a
 04 10
 05 /
 06 10^X
 07 1
 08 -
 09 SQRT
 10 STO 06
 11 RDN
 12 CF 00
 13 STO 24
 14 RTN
 15 LBL 10
 16 LBL A
 17 SF 00
 18 STO 24
 19 RTN
 20 LBL 16
 21 LBL b
 22 2
 23 GTO 00
 24 LBL 17
 25 LBL c
 26 3
 27 GTO 01
 28 LBL 12
 29 LBL C
 30 4
 31 LBL 01
 32 XEQ 00
 33 RDN
 34 XEQ 09
 35 STO 08
 36 RTN
 37 LBL 11
 38 LBL B
 39 1
 40 LBL 00
 41 STO 23
 42 RDN
 43 XEQ 09
 44 STO 07
 45 RTN
 46 LBL 13
 47 LBL D
 48 STO 00
 49 XEQ 09
 50 STO 22
 51 RDN
 52 XEQ 09
 53 STO 21
 54 RDN
 55 XEQ 09
 56 STO 20
 57 RTN
 58 LBL 14
 59 LBL E
 60 0
 61 STO 03
 62 STO 05
 63 1
 64 STO 04
 65 RCL 24
 66 STO 25
 67 XEQ 07
 68 LBL 08
 69 RAD
 70 XEQ 06
 71 RCL 01
 72 RCL 09
 73 +
 74 RCL 02
 75 R-P
 76 ST/ 04
 77 X<>Y
 78 ST- 05
 79 RCL 02
 80 RCL 01
 81 R-P
 82 ST* 04
 83 P-R
 84 RCL 09
 85 +
 86 RCL 02
 87 R-P
 88 X^2
 89 X<>Y
 90 RDN
 91 /
 92 ST+ 03
 93 7DSZ
 94 GTO 08
 95 RCL 20
 96 1
 97 XEQ 09
 98 /
 99 RCL 04
100 LOG
101 20
102 *
103 RND
104 RCL 05
105 1
106 P-R
107 DEG
108 R-P
109 CLX
110 RCL 03
111 7PRSTK
112 RCL 21
113 RCL 20
114 FS? 01
115 GTO 00
116 RCL 22
117 +
118 GTO 03
119 LBL 00
120 RCL 00
121 *
122 LBL 03
123 STO 20
124 X<=Y?
125 GTO 14
126 RTN
127 LBL 07
128 RCL 23
129 X<> 25
130 7GTOI
131 LBL 04
132 XEQ 03
133 GTO 00
134 LBL 02
135 XEQ 01
136 LBL 00
137 1/X
138 CHS
139 GTO 05
140 LBL 01
141 X<> 25
142 RCL 20
143 RCL 07
144 /
145 GTO 05
146 LBL 03
147 X<> 25
148 RCL 20
149 X^2
150 RCL 07
151 X^2
152 -
153 RCL 20
154 /
155 RCL 08
156 /
157 LBL 05
158 STO 09
159 RTN
160 LBL 06
161 FS? 00
162 GTO 01
163 XEQ 01
164 1
165 RCL 06
166 1/X
167 R-P
168 X<>Y
169 RDN
170 LASTX
171 +
172 LN
173 RCL 24
174 /
175 E^X
176 LASTX
177 CHS
178 E^X
179 +
180 ENTER
181 ENTER
182 LASTX
183 2
184 *
185 -
186 ST* 02
187 RDN
188 ST* 01
189 2
190 ST/ 02
191 ST/ 01
192 RTN
193 LBL 01
194 RCL 25
195 2
196 *
197 1
198 -
199 RCL 24
200 /
201 XEQ 09
202 4
203 /
204 1
205 P-R
206 STO 01
207 X<>Y
208 STO 02
209 RTN
210 LBL 18
211 LBL d
212 1
213 FS? 01
214 CLX
215 SF 01
216 X=0?
217 CF 01
218 RTN
219 LBL 09
220 2
221 *
222 PI
223 *
224 RTN
225 STOP
226 END

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