for the HP 42S
VN - Input refered voltage noise of an operational amplifier.

Figure.1 Noise model

Input
Output

Program list
Vn - Rev.1.00 : Dec. 30 2010
00 { 114-Byte Prgm }
01 LBL "Vn"
02 MVAR "Rs"
03 MVAR "Rg"
04 MVAR "Rf"
05 MVAR "Ta"
06 MVAR "Vn"
07 MVAR "In"
08 VARMENU "Vn"
09 STOP
10 EXITALL
11 RCL "Rf"
12 RCL× "Rg"
13 RCL "Rf"
14 RCL+ "Rg"
15 ÷
16 RCL "Rs"
17 5.5226016e-23
18 RCL "Ta"
19 ×
20 ×
21 LASTX
22 R↑
23 ×
24 R↑
25 RCL× "In"
26 X↑2
27 RCL "Rs"
28 RCL× "In"
29 X↑2
30 +
31 RCL "Vn"
32 X↑2
33 +
34 +
35 +
36 SQRT
37 X<>Y
38 SQRT
39 X<>Y
40 RTN
41 .END.


Download 'Vn-1.01' (vnoise.raw, 117 byte, raw program file for the Free42)

SEE ALSO

Noise performance of an Op.Amp circuit +Online calc

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