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...
Fig 1 Chopper offset-stabilized amplifier 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...
In this paper, a very low-offset continuous time amplifier has been presented. It has the fully differential structure and uses an Auto-zeroed offset stabilization technique. This structure consists of two phases in which the offset value is sampled in the first phase and then subtracted from ...
A Low-Noise Low-Offset Chopper-Stabilized Capacitive-Readout Amplifier for CMOS MEMS AccelerometersingentaconnectDigest of Technical Papers of the Solid State Circuits Conference
In this paper, a very low-offset continuous time amplifier has been presented. It has the fully differential structure and uses an Auto-zeroed offset stabilization technique. This structure consists of two phases in which the offset value is sampled in the first phase and then subtracted from ...
The amplifier has less than 1.5 $mu{hbox{V}}$ offset at a 16-kHz chopper frequency, a unity gain frequency of 1.3 MHz with a 50-pF load, and draws 700 $mu{hbox {A}}$ from a 5-V supply. The amplifier was realized in a 0.7 $mu{hbox {m}}$ CMOS process, and has an ...
As a result of the quite long pulses emitted by this laser, coherent octave-spanning SC generation for CEO beat detection could not be directly achieved from the laser output, but required external amplification using an Yb:fiber amplifier and pulse compression. An average power of 300 mW ...
In addition, a feedforward stage can be configured around the additional gain stage to facilitate increased overall stability in the amplifier.doi:US6639460 B1Thomas L. BotkerUSUS6639460 * 2002年4月16日 2003年10月28日 Texas Instruments Incorporated Residual offset correction method and circuit for...
A chopper-stabilized amplifier includes a main signal path having first and second chopping circuits at the inputs and outputs of a transconductance amplifier, and an auto-correction feedback loop. The feedback loop includes a transconductance amplifier connected to amplify the chopped output from ...
A chopper-stabilized amplifier includes a main signal path having first and second chopping circuits at the inputs and outputs of a transconductance amplifier, and an auto-correction feedback loop. The feedback loop includes a transconductance amplifier connected to amplify the chopped output from ...