In a receiver circuit for demodulating a high-frequency signal, a limiting
amplifier stage with a downstream sigma-delta converter is connected in
series with a mixer stage that transforms a high-frequency signal that is
supplied at its input into an intermediate-frequency signal. The
intermediate-frequency signal at the output of the limiting amplifier
stage is value-discrete and time-continuous. The described receiver
architecture has a high sensitivity, is substantially independent of
production tolerances, and occupies a small area; therefore, it is
particularly suitable for mobile radio applications.