* Thermal noise floor of a 1k resistor = sqrt(4kTR) = 4.07 nV/rtHz, flat.
* The spectral-density vectors live in the noise1 plot; select it first.
* NOTE onoise_spectrum is stored in V/sqrt(Hz) already (NOT squared).
V1 in 0 DC 0 AC 1
R1 in out 1k
C1 out 0 1p
.noise v(out) V1 dec 10 1 1k
.control
  run
  setplot noise1
  print onoise_spectrum[0]
.endc
.end