Analog/digital switching mixed mode amplifier and its applications for audio, regulator and TV아날로그/디지털 스위칭 혼합형 증폭기와 그 응용 : 오디오, 전원 및 TV

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Over the last several decades, there have been studied many amplifiers for the consumer electronics which are so familiar with human````s life. Amplifiers in electronics are used in a wide variety of applications in the areas of audio, TV, personal computer application and so on. A conventional analog amplifiers such as class A, class B and class AB based on the linear circuit technology, have very excellent distortion characteristics, but show considerably poor power efficiency and bulky volume for cooling. On the other hand, the class D digital switching amplifier, which adopts a pulse width modulation (PWM) technology, has high efficiency and small volume but relatively bad fidelity. This thesis presents analog / digital switching mixed mode amplifiers (MMA) and their applications for audio, regulator and TV. The proposed amplifier named MMA, more simply class k amplifier, simultaneously has only the advantages of conventional amplifiers, which are high fidelity (or low total harmonic distortion: THD) and high efficiency. It is composed of two amplifier circuits: one is analog amplifier and the other is digital amplifier. Analog amplifier plays a role of independent voltage source, which is responsible for high fidelity. On the other hand, digital amplifier works as a dependent current source, which is in charge of high efficiency. Digital amplifier supplies almost all the current needed in load, but analog amplifier merely supplies the rest of current, i.e., ripple current to compensate the distortion caused by the digital amplifier. In order to verify the operation principle as well as usefulness of MMA in commercial applications, the four kinds of prototypes, i.e., two kinds of audio power amplifiers, one regulator and one vertical deflection amplifier are implemented for the practical commercial applications. A novel mixed mode amplifier for high fidelity and high efficiency audio application is presented. To confirm the operation for audio application...
Advisors
Cho, Gyu-Hyeongresearcher조규형researcher
Description
한국과학기술원 : 전기및전자공학과,
Publisher
한국과학기술원
Issue Date
1999
Identifier
156197/325007 / 000955343
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 전기및전자공학과, 1999.8, [ vi, 121 p. ]

Keywords

Mixed mode; Digital; Analog; Amplifier; Regulator; 레귤레이터; 혼합; 디지털; 아날로그; 증폭기

URI
http://hdl.handle.net/10203/35814
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=156197&flag=dissertation
Appears in Collection
EE-Theses_Ph.D.(박사논문)
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