The Museum of HP Calculators

Active Filter Design 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. The Barcode for this program was provided by Brian Ward.

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
Display the Program Barcode (.pdf) for printing and scanning

Program Listing

LINE  KEYS
 01 LBL "AFLT67"
 02 LBL 15
 03 LBL a
 04 STO 00
 05 RTN
 06 LBL 10
 07 LBL A
 08 STO 01
 09 RTN
 10 LBL 16
 11 LBL b
 12 STO 02
 13 RTN
 14 LBL 11
 15 LBL B
 16 STO 03
 17 RTN
 18 LBL 12
 19 LBL C
 20 RCL 02
 21 2
 22 /
 23 RCL 01
 24 /
 25 2
 26 PI
 27 *
 28 RCL 00
 29 *
 30 RCL 03
 31 *
 32 STO 04
 33 /
 34 STO 05
 35 XEQ 05
 36 RCL 03
 37 4
 38 *
 39 RCL 01
 40 1
 41 +
 42 *
 43 RCL 02
 44 X^2
 45 /
 46 XEQ 05
 47 RCL 02
 48 2
 49 /
 50 RCL 01
 51 1
 52 +
 53 /
 54 RCL 04
 55 /
 56 XEQ 05
 57 RCL 01
 58 RCL 05
 59 *
 60 XEQ 05
 61 RCL 03
 62 XEQ 05
 63 RTN
 64 LBL 13
 65 LBL D
 66 RCL 03
 67 XEQ 05
 68 RCL 00
 69 *
 70 2
 71 *
 72 PI
 73 *
 74 STO 04
 75 RCL 02
 76 X<>Y
 77 /
 78 2
 79 RCL 01
 80 1/X
 81 +
 82 /
 83 XEQ 05
 84 RCL 03
 85 XEQ 05
 86 RCL 01
 87 /
 88 XEQ 05
 89 RCL 01
 90 2
 91 *
 92 1
 93 +
 94 RCL 02
 95 /
 96 RCL 04
 97 /
 98 XEQ 05
 99 RTN
100 LBL 14
101 LBL E
102 RCL 03
103 RCL 00
104 *
105 2
106 *
107 PI
108 *
109 STO 04
110 RCL 01
111 *
112 RCL 02
113 *
114 1/X
115 XEQ 05
116 2
117 RCL 02
118 X^2
119 /
120 RCL 01
121 -
122 RCL 04
123 *
124 RCL 02
125 *
126 1/X
127 XEQ 05
128 RCL 03
129 XEQ 05
130 XEQ 05
131 2
132 RCL 02
133 /
134 RCL 04
135 /
136 XEQ 05
137 RTN
138 LBL 05
139 FS? 00
140 7PRTX
141 FS? 00
142 RTN
143 STOP
144 RTN
145 STOP
146 END

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