Frequency Compensation Techniques for Low-Power Operational
Amplifiers is intended for professional designers of integrated
amplifiers, emphasizing low-voltage and low-power solutions.
The book bridges the gap between the professional designer's needs and
available techniques for frequency compensation. It does so by
explaining existing techniques and introducing several new techniques
including Hybrid Nested Miller compensation, Multipath Miller Zero
cancellation and Multipath Conditionally Stable compensation. All
compensation techniques are treated in a stage-number-based order,
progressing from a single transistor to circuits with six stages and
more. Apart from discussing the mathematical basis of the compensation
methods, the book provides the reader with the factual information that
is required for practicing the design of integrated feedback amplifiers
and many worked out examples. What is more, many bipolar and CMOS
operational amplifier realizations, along with their measurement
results, prove the effectiveness of the compensation techniques in
real-life circuits.
The text focuses on low-voltage, low-power integrated amplifiers. Many
of the presented bipolar circuits operate at supply voltages down to 1V,
while several CMOS amplifiers that function correctly just slightly
above this voltage are demonstrated. The lowest measured power
consumption amounts to 17muW for a class AB CMOS opAmp with 120dB gain.
Despite this attention to low voltage and low power, the frequency
compensation strategies provided are universally applicable. The
fundamental approach followed leads to efficient compensation strategies
that are well guarded against the parameter variations inherent to the
mass-fabrication of integrated circuits.
The book is essential reading for practicing analog design engineers and
researchers in the field. It is also suitable as a text for an advanced
course on the subject.
