An impedance network. The network includes a plurality of impedance elements,
at least one end terminal, and a wiper terminal. The network also includes a first
plurality of switching elements selectively providing tap positions to the at least
one end terminal, selectable at a first specified increment of impedance elements
in the plurality of impedance elements. The network further includes a second plurality
of switching elements selectively providing a tap positions to the wiper terminal,
selectable at a second specified increment of impedance elements in the plurality
of impedance elements.