The Museum of HP Calculators

Active Filter Design for the HP-41C/CV/CX

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 "AF"
 02 ENG 03
 03 "FO?"
 04 PROMPT
 05 STO 00
 06 "A?"
 07 PROMPT
 08 STO 01
 09 "PF?"
 10 PROMPT
 11 STO 02
 12 "C?"
 13 PROMPT
 14 STO 03
 15 STOP
 16 LBL "LP"
 17 RCL 02
 18 2
 19 /
 20 RCL 01
 21 /
 22 XEQ A
 23 /
 24 STO 05
 25 "R1="
 26 XEQ 05
 27 RCL 03
 28 4
 29 *
 30 RCL 01
 31 1
 32 +
 33 *
 34 RCL 02
 35 X^2
 36 /
 37 "C2="
 38 XEQ 05
 39 RCL 02
 40 2
 41 /
 42 RCL 01
 43 1
 44 +
 45 /
 46 RCL 04
 47 /
 48 "R3="
 49 XEQ 05
 50 RCL 01
 51 RCL 05
 52 *
 53 "R4="
 54 XEQ 05
 55 RCL 03
 56 "C5="
 57 GTO 05
 58 LBL "HP"
 59 RCL 03
 60 "C1=C3="
 61 XEQ 05
 62 RCL 01
 63 /
 64 "C4="
 65 XEQ 05
 66 XEQ A
 67 RCL 02
 68 X<>Y
 69 /
 70 2
 71 RCL 01
 72 1/X
 73 +
 74 /
 75 "R2="
 76 XEQ 05
 77 RCL 03
 78 RCL 01
 79 2
 80 *
 81 1
 82 +
 83 RCL 02
 84 /
 85 RCL 04
 86 /
 87 "R5="
 88 GTO 05
 89 LBL "BP"
 90 XEQ A
 91 RCL 01
 92 *
 93 RCL 02
 94 *
 95 1/X
 96 "R1="
 97 XEQ 05
 98 2
 99 RCL 02
100 X^2
101 /
102 RCL 01
103 -
104 RCL 04
105 *
106 RCL 02
107 *
108 1/X
109 "R2="
110 XEQ 05
111 RCL 03
112 "C3=C4="
113 XEQ 05
114 2
115 RCL 02
116 /
117 RCL 04
118 /
119 "R5="
120 LBL 05
121 ARCL X
122 AVIEW
123 STOP
124 RTN
125 LBL A
126 2
127 PI
128 *
129 RCL 00
130 *
131 RCL 03
132 *
133 STO 04
134 RTN
135 END

Go back to the HP-41 software library
Go back to the general software library
Go back to the main exhibit hall