49 lines
963 B
Plaintext
49 lines
963 B
Plaintext
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*noise of a resistive divider
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*noise of a resistive divider with filter
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*noise as above after a noiseless amplifier with gain 5
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V1 1 0 dc 0 ac 1
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R1 1 2 10k
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R2 2 0 10k
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V21 21 0 dc 0 ac 1
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R21 21 22 10k
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R22 22 0 10k
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C22 22 0 1u
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a1 2 3 amp
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.model amp gain(in_offset = 0 gain = 5.0
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+ out_offset = 0)
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a2 22 23 amp
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.control
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noise v(2) V1 dec 10 1 100k
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print onoise_total inoise_total
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setplot noise1
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print onoise_spectrum[0] inoise_spectrum[0]
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noise v(3) V1 dec 10 1 100k
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print onoise_total inoise_total
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setplot noise3
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print onoise_spectrum[0] inoise_spectrum[0]
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noise v(22) V21 dec 10 1 100k
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print onoise_total inoise_total
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setplot noise5
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print onoise_spectrum[0] inoise_spectrum[0]
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noise v(23) V21 dec 10 1 100k
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print onoise_total inoise_total
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setplot noise7
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print onoise_spectrum[0] inoise_spectrum[0]
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set xbrushwidth = 2
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plot onoise_spectrum noise5.onoise_spectrum inoise_spectrum xlimit 1 1e5
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.endc
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.end
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