Driving method and related apparatus for improving power efficiency of an operational transconductance amplifier

摘要

A driving method for improving power efficiency of an operational transconductance amplifier. The operational transconductance amplifier comprises a first current route and a second current route symmetrical to the first current route. Both of the first current route and the second current route comprise a plurality of transistors. Each of the transistors of the first current route has a smaller width/length ratio than the corresponding transistors of the second current route. The driving method comprises turning on the transistors of the first current route for outputting a reference current so that the second current route outputs a mirror current, which is greater than the reference current, corresponding to the reference current.