About SPICE |
SPICE Basics |
Running SPICE |
CIRCUIT COLLECTION
SPICE Commands |
SPICE Downloads |
About |
Contact |
Home
How does each component error
impact the circuit error?
Back to EBA Series
What is Sensitivity (S)?
Examples
What is S good for?
Direct Units Normalized Example: Sensitivity of offset voltage to bias current. Example: Sensitivity of gain to resistor tolerance. Offset Error Calc Gain Error Calc Example:
ibias = 100nA
S = 1000 (V/A)
∆Voffset = ibias * S
= 100nA * 1000 (V/A)
= 100uVExample:
R1_Tol = 0.1%
S = 0.5
∆K/K = R1_Tol * S
= 0.1% * 0.5
= 0.05%
Suppose you have an amplfier defined by a gain of K = R2/R1+1. How does a change in R2 cause a change in K?
The gain error is defined as a ratio where K is the ideal gain and K' is
the actual gain with errors.
The Ideal Gain K and Actual Gain K’ can be written as
For a numerical example check out the next topic (link below).
Let's apply Sensitivity Analysis to a simple Offset and Gain Error Example.
Back to EBA Series