45 lines
1.0 KiB
Plaintext
45 lines
1.0 KiB
Plaintext
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* noise of a resistive divider
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* noise of a resistive divider, lower resistor noiseless
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* noise of a resistive divider with filter
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* 'set behavior = lta' is required
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.model res1 resistorva has_noise=1 R=10K
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.model noiseless resistorva has_noise=0 R=10K
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V1 1 0 dc 0 ac 1
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n1 1 2 res1
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R2 2 0
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V11 11 0 dc 0 ac 1
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n11 11 12 res1
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n12 12 0 noiseless
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V21 21 0 dc 0 ac 1
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n21 21 22 res1
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n22 22 0 res1
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C22 22 0 1u
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.control
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pre_osdi resistor.osdi
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noise v(2) V1 dec 10 1 100k 1
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echo **resistive divider**
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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(12) V11 dec 10 1 100k
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echo **resistive divider, lower resistor noiseless**
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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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echo **resistive divider with filter**
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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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set xbrushwidth=2
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plot onoise_spectrum inoise_spectrum xlimit 1 1e5
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.endc
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.end
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