* noise of a resistive divider
* noise of a resistive divider, lower resistor noiseless
* noise of a resistive divider with filter
* 'set behavior = lta' is required

.model res1 resistorva has_noise=1 R=10K
.model noiseless resistorva has_noise=0 R=10K
V1 1 0 dc 0 ac 1
n1 1 2 res1
R2 2 0

V11 11 0 dc 0 ac 1
n11 11 12 res1 
n12 12 0 noiseless

V21 21 0 dc 0 ac 1
n21 21 22 res1 
n22 22 0 res1 
C22 22 0 1u

.control
pre_osdi resistor.osdi
noise v(2) V1 dec 10 1 100k 1
echo **resistive divider**
print onoise_total inoise_total
setplot noise1
print onoise_spectrum[0] inoise_spectrum[0]
noise v(12) V11 dec 10 1 100k
echo **resistive divider, lower resistor noiseless**
print onoise_total inoise_total
setplot noise3
print onoise_spectrum[0] inoise_spectrum[0]
noise v(22) V21 dec 10 1 100k
echo **resistive divider with filter**
print onoise_total inoise_total
setplot noise5
print onoise_spectrum[0] inoise_spectrum[0]
set xbrushwidth=2
plot onoise_spectrum inoise_spectrum xlimit 1 1e5
.endc

.end