Page 130 - The Art and Science of Analog Circuit Design
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James M. Bryant
nents, it may be isolated with a transformer close to the driver. Such an
arrangement is shown in Figure 9-17. (The nature of the connection from
the transformer to the load may present its own problems—but supply
decoupling is not one of them.)
A correctly terminated transmission line constrains HF signal currents
so that, to the supply decoupling capacitors, the load appears to be adja-
cent to the driver. Even if the line is not precisely terminated, it will con-
strain the majority of the return current and is frequently sufficient to
prevent ground current problems.
Figure 9-17.
Constant
Current
Source
Figure 9-18.
Having considered issues of resistance, capacitance, and inductance, it is
clear that breadboards must be designed to minimize the adverse effects
of these phenomena. The basic principle of a breadboard is that it is a
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