Ripple suppression method, circuit and load driving circuit thereof
AssigneeSilergy Semiconductor Technology (Hangzhou) LTD
InventorsQiukai Huang, Jian Deng
Life of this patent
Estimating the term…
Abstract
A method of suppressing ripple can include: (i) coupling a switching converter and a load in series between output terminals of a signal source; and (ii) controlling a difference voltage between an input voltage signal and an output voltage signal of the switching converter to vary with a voltage signal generated by the signal source to maintain a load current signal flowing through the load as a DC signal.
Claims19
A method of suppressing ripple, the method comprising:
- a) coupling a switching converter and a load in series between output terminals of a signal source;
- b) controlling a difference voltage between an input voltage signal and an output voltage signal of said switching converter to vary with a voltage signal generated by said signal source to maintain a load current signal flowing through said load as a DC signal;
- and
- c) controlling an average value of said difference voltage to be zero.
The method of claim1, wherein the controlling said difference voltage to vary with said voltage signal generated by said signal source comprises:
- a) controlling said switching converter to store a portion of output energy of said source signal when said voltage signal is greater than a predetermined signal;
- and
- b) controlling said switching converter to release energy when said voltage signal is not greater than said predetermined signal, in order to provide energy to said load together with said source signal.
A ripple suppression circuit, comprising:
- a) a switching converter coupled in series with a load between output terminals of a signal source;
- and
- b) wherein a difference voltage between an input voltage signal and an output voltage signal of said switching converter follows the variation of a voltage signal generated by said signal source, in order to maintain a load current signal of said load as a DC value, wherein an average value of said difference voltage is zero.
Dependencies are inferred from the claim text.