CAJ | 학술논문

采用迟滞比较器的自激振荡功率放大器,在音频功放、DSL线路驱动器及数据转换器等方面得到了较好的应用.但由于其强非线性的特性,分析其行为特性较为困难.本文从时域出发分析了1阶和2阶系统的振荡频率,以线性化的比较器增益为基础分析了系统增益,给出了3次谐波失真的经验公式,不仅简洁、直观,而且具有较高的精度.这些结果经Matlab仿真验证,可以给电路设计者较好的指导作用.
채용지체비교기적자격진탕공솔방대기,재음빈공방、DSL선로구동기급수거전환기등방면득도료교호적응용.단유우기강비선성적특성,분석기행위특성교위곤난.본문종시역출발분석료1계화2계계통적진탕빈솔,이선성화적비교기증익위기출분석료계통증익,급출료3차해파실진적경험공식,불부간길、직관,이차구유교고적정도.저사결과경Matlab방진험증,가이급전로설계자교호적지도작용.
The self-oscillating power amplifier employing hysteretic comparator has a lot of applications in audio power amplifiers, DSL line drivers and data converters. The analysis of its behavior, however, is difficult because it is a hard non-linear system. In this paper, aimed at the first- and second-order systems, the oscillating frequencies are analyzed from the point view of the time domain. The system gains are reached based on the linearized gain of the comparator. The empirical equations of the third-order harmonic distortion are not only concise and intuitive, but also accurate. These results that are verified by the Matalb simulation can give a guideline to the circuit designers.