mos运放输入极设计

Teresa

【文件名】:0665@52RD_输入极设计.rar
【格　式】:rar
【大　小】:191K
【简　介】:A rail to rail input common mode range is an important requirement in operational amplifiers for some applications. The most common method for
implementing full range operation is by using a complementary differential pair. It is simply a compound structure that consists of NMOS and PMOS differential pairs connected in parallel. The compound structure achieves rail to rail operation; however, it produces variations in the transconductance over the input common mode range. The variations obstruct the design of an optimal operational amplifier. This paper discusses sources and solutions for the transconductance variations. Several reported approaches to solve the problem will be evaluated. They reduce the variations to 5-28% depending on
the technique and method of implementation used. This is a significant improvement over 100% variations we get from complementary differential pair without utilizing any constant gm technique.
【目　录】:
1. Introduction
2. Rail to Rail Operation
3. The Input Stage
4. Constant Transconductance Input Stage
5. Conclusion