Patent ID: 9110648
Filing Date: 2015-08-18
Classification: G06F

Abstract:
1. A power supply circuit, configured to power an electronic device with functioning parts, the power supply circuit comprising: a power output port configured to connect to the electronic device; an operational amplifier comprising a non-inverting input port, an inverting input port, and a first output port, wherein, the non-inverting input port is grounded; a voltage adjusting circuit connected to the inverting input port of the operational amplifier, configured to receive a reference voltage and convert the reference voltage to an operational signal, and provide the operational signal to the inverting input port of the operational amplifier, wherein, the operational amplifier outputs a corresponding electric signal according to the operational signal; a feedback circuit comprising a feedback input port, a feedback output port, and a second output port, wherein, the feedback input port is electrically connected to the first output port of the operational amplifier, the feedback output port is connected to the inverting input port of the operational amplifier, the second output port is electrically connected to the power output port, the feedback circuit being configured to output a power supply voltage to the power output port based on the operational signal output by the voltage adjusting circuit via the second output port; and a current controlling circuit comprising a control port and a transmission port, wherein the control port is connected to the first output port, the transmission port is electrically connected to the power output port; the current controlling circuit is configured to output a power supply current to the power output port according to the electric signal output by the first output port.