===== Noise Syntax =====

//This section contains descriptions which are not implemented yet in simualtor. Work is in progress.//

Spice .noise command syntax is implemented:

''.noise V(<N1>[,<N2>]) <VIN> <ac_description>''

  * <N1>, <N2> - output node numbers, if N2 is omited ground is implied;
  * <VIN> - input AC source at which noise power will be calculated;
  * <ac_description>  - gnucap AC simulation statement.

Here are some examples:

  * ''.noise V(6) Vin dec 10 20 20k'' 

- noise at node 6 w.r.t. ground, calculated to **Vin**, noise power densinty will be calculated 
using **10** points per **dec**ade (logarithmic scale) in frequency range from **20Hz** to **20KHz**


  * ''.noise V(6,3) VSRC oct 2 10 10k'' 

- noise between nodes 6 and 3, calculated to **VSRC**, noise power densinty will be calculated 
using **2** points per **oct**ave (logarithmic scale) in frequency range from **10Hz** to **10kHz**