Analog design is one of the more difficult aspects of electrical engineering. The main reason is the apparently
vague decisions an experienced designer makes in optimizing his circuit. To enable fresh designers, like students
electrical engineering, to become acquainted with analog circuit design, structuring the analog design process
is of utmost importance.
Structured Electronic Design: Negative-Feedback Amplifiers presents a design methodology for negative-feedback
amplifiers. The design methodology enables to synthesize a topology and to, at the same time, optimize the
performance of that topology.

Key issues in the design methodology are orthogonality, hierarchy and simple models. Orthogonality enables
the separate optimization of the three fundamental quality aspects: noise, distortion and bandwidth. Hierarchy
ensures that the right decisions are made at the correct level of abstraction. The use of simple models, results
in simple calculations yielding maximum-performance indicators that can be used to reject wrong circuits relatively
fast.

The presented design methodology divides the design of negative-feedback amplifiers in six independent steps.
In the first two steps, the feedback network is designed. During those design steps, the active part is assumed
to be a nullor, i.e. the performance with respect to noise, distortion and bandwidth is still ideal.

In the subsequent four steps, an implementation for the active part is synthesized. During those four steps
the topology of the active part is synthesized such that optimum performance is obtained. Firstly, the input stage
is designed with respect to noise performance. Secondly, the output stage is designed with respect to clipping
distortion. Thirdly, the bandwidth performance is designed, which may require the addition of an additional
amplifying stage. Finally, the biasing circuitry for biasing the amplifying stages is designed.
By dividing the design in independent design steps, the total global optimization is reduced to several local
optimizations. By the specific sequence of the design steps, it is assured that the local optimizations yield
a circuit that is close to the global optimum. On top of that, because of the separate dedicated optimizations,
the resource use, like power, is tracked clearly.

Structured Electronic Design: Negative-Feedback Amplifiers presents in two chapters the background and an
overview of the design methodology. Where after, in six chapters the separate design steps are treated with
great detail. Each chapter comprises several exercises. An additional chapter is dedicated to how to design
current sources and voltage source, which are required for the biasing. The final chapter in the book is
dedicated to a thoroughly described design example, showing clearly the benefits of the design methodology.

In short, this book is valuable for M.Sc.-curriculum Electrical Engineering students, and of course, for
researchers and designers who want to structure their knowledge about analog design further.

Download File Size:10 MB

---