Patent ID: 8698475
Filing Date: 2014-04-15
Classification: H02M

Abstract:
1. A switching-mode power supply (SMPS), comprising: an output port configured to supply a load; a control signal generator having an input and an output, wherein the output is configured to provide a first control signal; a first switch configured to receive the first control signal, wherein the first switch is configured to regulate an output voltage at the output port; a ramp signal generator comprising an input and an output, wherein the input of the ramp signal generator is configured to receive the control signal, wherein the output of the ramp signal generator is configured to provide a ramp current signal in accordance with the control signal, and wherein the output of the ramp signal generator is coupled to the input of the control signal generator; and a resistor module converting the ramp current signal into a ramp voltage signal; wherein the resistor module shares a feedback circuit of the SMPS, and the feedback circuit comprising two resistors, and wherein the ramp voltage signal is configured to be adjusted by changing the resistance values of the two resistors.