A kind of switch current source with high order LC filter output

Author

Liu, Bumin ; Fu, Cuiqin ; Que, Bincheng

Author_Institution

Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2010

fDate

28-30 July 2010

Firstpage

518

Lastpage

521

Abstract

A kind of switch current source with feedback loop compensation is presented in this paper to solve the problem that switching current source can not be applied in high-precision circuit. A good tradeoff has been made by this type of switch current source in improving the dynamic response and reducing low ripple. At the beginning of the paper, the model of BUCK-type circuit is built after analyzing the circuit. Next, the main factor which affects the stability of the system, the filter, is emphasized. The contradiction of high out band rejection and high stability which exists in LC filter is pointed out. To solve this problem, the program of feedback loop compensation is proposed; to verify this program the simulation result is presented. Finally, the implementation circuit of switch current source with high order LC filter output is presented.

Keywords

circuit feedback; switched current circuits; switched mode power supplies; feedback loop compensation; high order LC filter output; switch current source; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems (ICCCAS), 2010 International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-8224-5

Type

conf

DOI

10.1109/ICCCAS.2010.5581924

Filename

5581924