NOISE in OAs [SLYT-051 + SLVA043 + AN-104 + AN-358] Noise factor - - PowerPoint PPT Presentation

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Nov 21, 2022 206 likes •314 views

NOISE in OAs [SLYT-051 + SLVA043 + AN-104 + AN-358] Noise factor Noise figure Note: these are powers, not intensities; G is the power gain (1) (1) no, the numerator is R M R G (1) (1) (1) (1) from SLVA043A For the configuration as

SLIDE 1

NOISE in OAs

[SLYT-051 + SLVA043 + AN-104 + AN-358]

SLIDE 2

 Noise factor  Noise figure

Note: these are powers, not intensities; G is the power gain

SLIDE 3

SLIDE 4

SLIDE 5

(1)

(1) no, the numerator is RMRG

SLIDE 6

(1) (1) from SLVA043A (1) (1)

SLIDE 7

SLIDE 8

For the configuration as differential amp. See SLVA043A For the fully differential opamp see SLYT051

SLIDE 9

Which is worse, en or in? It depends...

 In this example (Av=1) dependence on the source

resistance is shown OPA227: low en OPA277: low in

in makes more

noise on a larger Rs