← 返回 JSSC 论文列表JSSC 2006第12期Digital Circuits0.6μm/0.3μmNeural Network AcceleratorOp-Amp
A Micropower Chopper-Stabilized Operational Amplifier Using a SC Notch Filter Wit
提出了一种微功耗斩波稳定运算放大器,采用SC陷波滤波器消除斩波噪声。
1.8-5.5V, 17μA, 3μV输入偏移, 0.02μV/°C, 350kHz GBW, 125kHz斩波频率
微功耗斩波稳定SC陷波滤波器运算放大器CMOS
▸创新点1:斩波输入级 - 采用斩波技术显著降低输入失调电压和漂移,输入失调电压仅为3μV,漂移低至0.02μV/°C,提升了放大器的精度和稳定性(电路创新)。
▸创新点2:SC陷波滤波器消除斩波纹波 - 在连续时间信号路径中引入同步积分开关电容滤波器,有效抑制斩波频率相关的纹波噪声,提高信号纯净度(方法创新)。
▸创新点3:多路径嵌套米勒补偿保持高速信号路径 - 通过多路径嵌套米勒补偿技术,在保持高速信号路径不失真的同时,优化了放大器的频率响应和稳定性(系统创新)。
▸创新点4:宽电源电压范围与温度适应性 - 放大器支持1.8V至5.5V的宽电源电压范围,并在-40°C至125°C温度范围内稳定工作,适应多种应用场景(系统创新)。
Abstract
A micropower chopper stabilized opamp is presented.
The new topology incorporates a switched capacitor filter with
synchronous integration inside the continuous time signal path
virtually eliminating chopping noise. A three-stage amplifier with
multipath nested Miller compensation is modified to incorporate
chopping of the input stage, sinc filtering to notch any chopping
ripple, and a compensation scheme to maintain an undistorted
high-speed signal path. Characteristics of the amplifier presented
in