This allows for good design techniques. The following shows how to get the bias values in Spice. This can also be placed in the circuit file as .OP and a run command issued in Spice. Line 2, the display shows all the nodes that can be measured. Lines 3 and 4 display the same information by using two different format commands.
Spice only gives the current values for a limited number of devices.
A spice trick is to insert a zero dc voltage source in between the desired wire and then measure the current of this zero voltage source. The frequency that marks the F -3dB upper edge of the passband and the beginning of the transition to the stopband. Refers to a device adding harmonics that were not in the original signal. Usually an amplifier's frequency response is given for the range over which it can reproduce the input signal within an accuracy of 3 db. These are the upper and lower frequencies at which output falls below the rated power by more than 3 dB. Because this figure is not clearly definitive, the prospective buyer should know how the designer has arrived at his specification.