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A High-Performance Operational Amplifier for High-Speed High-Accuracy Switch-Capacitor Cells
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ning, Ning Chen, Da |
| Copyright Year | 2007 |
| Abstract | A high-speed high-accuracy fully different- tial operational amplifier (op-amp) is realized based on no-Miller-capacitor feedforward (NMCF) compensation scheme. In order to achieve a good phase margin, the NMCF compensation scheme uses the positive phase shift of left-half-plane (LHP) zero caused by the feedforward path to counteract the negative phase shift of the non-dominant pole. Compared to traditional Miller compensation method, the op-amp obtains high gain and wide band synchronously without the pole-splitting effect while saves significant chip area due to the absence of the Miller capacitor. Simulated by the 0.35 µm CMOS RF technology, the result shows that the open-loop gain of the op-amp is 118 dB with the unity gain-bandwidth (UGBW) of 1 GHz, and the phase margin is 61owhile the settling time is 5.8 ns when achieving 0.01% accuracy. The op-amp is especially suitable for the front-end sample/hold (S/H) cell and the multiplying D/A converter (MDAC) module of the high-speed high-resolution pipelined A/D converters (ADCs). |
| Starting Page | 366 |
| Ending Page | 369 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| Volume Number | 5 |
| Alternate Webpage(s) | http://www.ccs.asia.edu.tw/ezfiles/2/1002/img/446/0704-20.pdf |
| Alternate Webpage(s) | http://www.journal.uestc.edu.cn/archives/2007/4/5/366-36951052.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
