INCREASED POWER EFFICIENCY IN DRIVER CIRCUITS

摘要

Methods and systems for sourcing and/or sinking current from power supplies of differing voltage levels. A driving circuit may, for example, receive power from first and second power supplies, where the first power supply provides current to the driving circuit at a first voltage level and the second power supply provides current to the driving circuit at a second voltage level, and where the first voltage is greater than the second voltage. As a result, the first power supply allows the driving circuit to provide current over a wide voltage range, and the second power supply allows the driving circuit to provide current at lower voltages with less power consumption.

主权项

1. A force/sense circuit, comprising:
first and second resistors; a driver configured to source driver current through the first and second resistors from a first power supply of a first voltage; a current injector configured to source injector current through the second resistor from a second power supply of a second voltage, wherein the magnitude of the first voltage is greater than the magnitude of the second voltage; a force output configured to conduct the driver current and the injector current to another circuit when electrically connected to the other circuit; and a sense output configured to transmit a signal corresponding with the sum of the driver current and the injector current.