The Museum of HP Calculators

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

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