Time-modulating circuits are commonly
used in switching applications. Switch-Mode
Power Supplies (SMPS) such as buck or boost
converters rely mainly on the dynamic
variation of the “on” and “off” time, depending
on external components, as well as loop
architecture.
An exponential function of output versus
input delivers an important advantage over its
linear alternative. In an exponential variation,
any Ä variation at any input value would
generate the same percentage difference in
output. This consideration is important when
designing complex control loops, due to ease
of calculations.
This paper presents a time modulator
architecture that offers a quasi-exponential
relation between input voltage and output time
delay.