The accompanying Fig P410 shows only the asymptotes of a Bod

The accompanying Fig. P4.10 shows only the asymptotes of a Bode plot. The char- acteristic response is used for gain enhancement-increasing the gain over a small

Solution

In electrical engineering and control theory, a Bode plot /bodi/ is a graph of the frequency response of a system. It is usually a combination of a Bode magnitude plot, expressing the magnitude (usually in decibels) of the frequency response, and a Bode phase plot, expressing the phase shift. Both quantities are plotted against a horizontal axis proportional to the logarithm of frequency. Given that the decibel is itself a logarithmic scale, the Bode amplitude plot is log–log plot, whereas the Bode phase plot is a lin-log plot.[1]
As originally conceived by Hendrik Wade Bode in the 1930s, the plot is only an asymptotic approximation of the frequency response, using straight line segments.[2] However, with the advent of low cost computing, it is often taken nowadays to mean the precise plot of the actual frequency response.