D类功放中高性能三角波积分器的设计  

A High Performance Triangle Wave Integrator Design for Class-D Amplifier

作　　者：冯旭[1] 王松林[1] 来新泉[1] 王慧[1] 

机构地区：[1]西安电子科技大学机电工程学院,陕西西安710071

出　　处：《微电子学与计算机》2009年第3期220-223,共4页Microelectronics & Computer

摘　　要：设计了一款应用于音频D类功率放大器中的积分器,用于产生PWM调制所需的三角波信号.积分器内部高增益、宽输出摆幅的高速运放大大提升了积分器的性能,有效地提高了D类功放的效率.本设计基于0.6μmBCD工艺,经Cadence环境仿真验证,内部运放开环增益高达103dB,单位增益带宽达到6.8MHz,而且压摆率不受限制;积分器输出三角波中心电平稳定在3V,且摆幅高达5V.The paper presents an integrator design for audio Class-D amplifier,The integrator produces triangle wave signal which is needed by pulse width modulator of Class-D Amplifier.The integrator comprises a high-gain and wide voltage output swing operational amplifier,which promotes the integrator s performance greatly and enhances the Class-D amplifier s efficiency.The circuit is designed based on the 0.6μm BCD process.The simulation under Cadence conditions shows that the interior op-amp achieves an open-loop ...

关 键 词：压摆率 高增益 宽输出摆幅 积分器 D类功放 

分 类 号：TN722.75[电子电信—电路与系统]