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Abstract —Intemally compensated CMOS op amps have been widely
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您需要 登录 才可以下载或查看,没有账号?注册  used in sampled-analog signaf processing applications over the past several
 years; however, the popular two-stage op amp suffers from poor ac power
 supply rejection to one of the power rails. This paper presents two circuits
 that overcome the PSRR problems of the earlier amplifiec one for virtual
 ground applications such as switched-capacitor integrators, and the other
 for buffer applications requiring wide common-mode input range. Small
 signal [email=an@ysis]an@ysis[/email] is developed for the open loop and PSRR responses of the
 two amplifiers. In addition, design guidelines are suggested and test results
 are presented.
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