Patent ID: 7906950
Filing Date: 2011-03-15
Classification: H02M

Abstract:
1. A method of tuning a switching power supply, the power supply comprising: at least one switching transistor; a filter circuit disposed between the switching transistor and the output of the power supply, the filter circuit having a design impedance; a pulse generator that drives the switching transistor; a programmable filter connected to the output of the filter circuit; a digital signal processor (‘DSP’) connected to the output of the filter circuit, the DSP configured to program the programmable filter; and a tuning control circuit connected to the output of the filter circuit, to the pulse generator, and to the DSP; the method comprising: calculating by the DSP, from sampled voltage values of a tuning pulse driven through the filter circuit by the pulse generator, the actual impedance of the filter circuit; and programming, by the DSP, the programmable filter, setting the combined impedance of the filter circuit and the programmable filter to the design impedance of the filter circuit.