HYSTERESIS-CURRENT-CONTROLLED CLASS-D AMPLIFIER WITH ACTIVE CURRENT SENSING TECHNIQUES

• Main Authors: Chien-Tsung Lai, 賴健宗
• Other Authors: Juing-Huei Su Dr.Jiann-Jong Chen
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/03439832355051947277

碩士 === 龍華科技大學 === 電子系碩士班 === 94 === A hysteresis-current-controlled (HCC) class-D amplifier with active current sensing techniques is presented in this thesis. The proposed active current sensing circuit uses no passive elements to fully measure the bi-direction inductive load current in class-D amplifier. A hysteresis-current-controller is then used to control the measured current follow a reference signal. 　　The entire circuit contain an error amplifier, a hysterrsis-current-controlled circuit, a sample -and-hold circuit, an active current sensing circuit, a driver circuit……etc. The details of the entire circuit will be described thoroughly in this thesis. The class-D amplifier has been fabricated with TSMC 3.3-V, 0.35-μm double-poly quadruple-metal CMOS technology.