A direct conversion circuit that includes an in-phase and quadrature-phase
feedback path that reduces Direct Current (DC) offset. Each feedback path
includes a compensating mixer that generates an error correction voltage
that is passed through a loop gain circuit and an integrator. The
integrated signal is applied to the output of a low pass filter that
operates on the down-converted baseband signal. The direction conversion
circuit may not only down convert the received modulated signal using a
down-converting mixer into a baseband signal, but also, after performing
a passive low pass filtering to remove higher-order components, performs
up-conversion of the baseband signal using an up-converting mixer. This
allows active elements operating on the up-converted signal to introduce
less 1/f noise.