Chapter 3 Offset-stabilized amplifiers 为了解决AZ离散时间的问题,TI的OPA335采用的multi-path的ping-pong结构,ping-pong其实就是两条AZ通路,一条在采用Vos另一条就作为信号通路,以实现信号传递的连续。OPA335的ping-pong作为低频通路,而信号恒在高频通路。 上图的ping-pong结构的voltage spike来自于Vb1在Va和Vc1...
失调稳态一种用来设计高精度运算放大器的技术。基本工作原理如下图所示。 Fig1 The concept of the offset-stabilized operational amplifier Gm2为主放大器,其失调为Vos。Gm4假想为是一个零失调的运放,它用来对Gm2的Vos进行处理。Gm3可以看作主放大器的辅助输入。Gm4在Gm3输入端产生一个输入电压,Gm3再产生一个...
Precision operational amplifiers (opamp) with 30V supply operation have been widely used to support industrial, instrumentation, and other applications [1]... Y Kusuda - IEEE Journal of Solid-State Circuits 被引量: 5发表: 2015年 加载更多来源...
operational amplifiersIn this paper, an offset-stabilized operational amplifier is described. The amplifier employs a chopper amplifier in a low frequency path to cancel the offset of a wide-bandwidth amplifier. A sample-and-hold circuit is used to reduce the chopper ripple, and the low frequency...
offset cancellationauto-zeroingchoppingchopper stabilizationripple reductionfrequency compensationSummary Instrumentation amplifiers are widely applied in a variety of ... G Meijer,M Pertijs,K Makinwa - John Wiley & Sons, Ltd 被引量: 8发表: 2014年 A 0.5-V power-efficient low-noise CMOS instrumentatio...
US6639460 * 2002年4月16日 2003年10月28日 Texas Instruments Incorporated Residual offset correction method and circuit for chopper stabilized amplifiersUS6639460 * Apr 16, 2002 Oct 28, 2003 Texas Instruments Incorporated Residual offset correction method and circuit for chopper stabilized amplifiers...
Residual offset correction method and circuit for chopper stabilized amplifiersAn improved circuit and technique are provided that facilitate residual offset correction during chopper stabilization of an amplifier circuit. A chopper stabilized amplifier can be configured with an additional gain stage configured...
Amplifiers for biological signals aimed to implantable medical devices require high gain and low noise, while maintaining very low power consumption. There... G Costa,A Arnaud,MR Miguez - DBLP 被引量: 5发表: 2010年 Dynamic Offset Cancellation in Operational Amplifiers and Instrumentation Amplifiers...
LIGHT amplifiersLIGHT sourcesQUANTUM opticsOPTOELECTRONIC devicesOptical frequency combs have been revolutionizing many research areas and are finding a growing number of real-world applications. While initially dominated by Ti:Sapphire and fiber lasers, optical frequency combs from modelocked diode-pumped ...
图1是一个斩波失调稳态放大器,Gm4决定整个运放的低频noise和offset。LPF是用来抑制Gm4斩波后带来的纹波(ripple),否则在最后输出波形上表现出很多高幅值毛刺。斩波后的残余失调电压Vos,res在上一篇文章中已经给出公式了。 Fig 2 Noise in chopper-stabilized amplifiers 图2它是斩波稳态放大器的斩波前后的噪声功率谱密...