A circuit for reducing the maximum magnitude of the total current on each
of a plurality of buses for an amplifier stage in a folding analog to
digital converter. Each amplifier stage bus couples multiple
transconductance circuits to a load. Also, each of the transconductance
circuits is configured to output a separate transconductance current to
its respective bus. Separate current source circuits are configured to
provide a separate source current locally at the output of each of the
transconductance circuits such that substantially less than the full
amount of each transconductance current reaches the respective bus.