Abstract: This disclosure is directed towards systems and methods that may prevent backpowering of a voltage source during a current monitoring operation. In a first example circuit, a switch may be used to mitigate an offset voltage of an operational amplifier. In a second and third example, a resistor may be used to generate an opposing voltage to the offset voltage to mitigate the offset voltage of the operational amplifier. Other examples are described that may mitigate sensing dead zones of some of the solutions and/or that may mitigate temperature variations changing an effectiveness of the mitigation.

Abstract: A regulator circuit included in a computer system may include a control circuit and multiple pass circuits that source respective supply currents to a regulated power supply node by adjusting respective conductance values between an input power supply node and the regulated power supply node. The number of pass circuits can be adjusted on a design-by-design basis based on a threshold load current for the regulator circuit or on a threshold conductance between the input power supply node and the regulated power supply node. The control circuit adjusts the respective conductance values using a combination of respective sense currents generated by the multiple pass circuits along with a reference voltage and a voltage level of the regulated power supply node.