VN - Input refered voltage noise of an operational amplifier / HP-42S

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

Figure.1 Noise model

Input

Var Rs: Source resistance [Ω]| 0 < Rs
Var Rf: Feedback resistor [Ω]| 0 < Rf
Var Rg: Gain resistor [Ω]| 0 < Rg
Var Ta: Absolute temparature [K]| 0 < K
Var Vn: Input refered voltage noise of an Op.Amp. [V/√Hz]| 0 < Vn
Var In: Input current noise of an Op.Amp. [A/√Hz]| 0 < In

Output

REG y: Jhonson noise of the source resistance 'Rs' at 'Ta' [V/√Hz]
REG x: Input refered voltage noise of an operational amplifier [V/√Hz]

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