42 lines
935 B
Plaintext
42 lines
935 B
Plaintext
* 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
|
|
|
|
V1 1 0 dc 0 ac 1
|
|
R1 1 2 10k
|
|
R2 2 0 10k
|
|
|
|
V11 11 0 dc 0 ac 1
|
|
R11 11 12 10k
|
|
R12 12 0 10k noisy=0
|
|
|
|
V21 21 0 dc 0 ac 1
|
|
R21 21 22 10k
|
|
R22 22 0 10k
|
|
C22 22 0 1u
|
|
|
|
.control
|
|
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
|
|
|
|
|