Firing actuator power supply system

摘要

A method and apparatus supply electrical current to a firing actuator of a printhead die across a high side switching transistor in a source follower arrangement and supply a regulated voltage, that is no greater than a concurrent voltage at a drain of the HSS transistor, to a gate of the high side switching transistor.

主权项

1. An apparatus comprising:
a first nozzle; a first firing actuator associated with the first nozzle; and a firing actuator power supply system comprising: an internal power supply path; a first high side switching (HSS) transistor in a source follower arrangement, the first HSS transistor having a drain electrically connected to the internal power supply path and a source electrically connected to a first end of the first firing actuator; and a voltage regulator having an input electrically connected to the internal power supply path and an output electrically connected to a gate of the first HSS transistor, the voltage regulator to provide the gate of the first HSS transistor with a controlled voltage no greater than a concurrent voltage at the drain.