3 A SMART SENSOR WITH A NON-LINEAR RESPONSE

In the former version, the system has a linear response: If the entered value is increased by 3,

the result sent to the wave generator is also increased by 3. However, many systems present

non-linear behaviour either due to a non-linear input signal or to a non-linear output stage. In

such cases, non-linear transformation capabilities are required.

In this new case a response after the subtractor, as shown in Figure 4, is obtained by only

adding two symbols: A transformation table to pass from a linear evolution to a x2-like curve

and a limiter symbol to limit the total excursion. The transformation table is a standard ASCII

file with a very simple syntax : Input value, Output value, as shown in Figure 5.

Figure 4: Response Transformation Into A Non-Linear Curve

7/14