高增益及寬頻轉導運算放大器之設計

The Design of a High-Gain and Wide Bandwidth Operational Transconductance Amplifier

李元彪(Yuan-Piao Lee) ； 陳德修(Te-Hsiu Chen) ； 林根右(Ken-Yu Lin) ； 林文彬(Wen-Pin Lin)

《科學與工程技術期刊》 6卷1期 (2010/03) Pp. 51-56

https://doi.org/10.7117/JSET.201003.0051

摘要

運算放大器發展至今已有相當歷史，高增益、高穩定度運算放大器，可運用在計算機等，用途相當廣汎。本晶片設計使用國家晶片中心所提供之0.35微米製程。運用疊接差動對搭配疊接電流源，達到高增益之目標。本晶片經模擬其電壓增益可達60.9dB、頻寬高達289MHz、而相位邊限可達到70°、和功率消耗僅爲432.0μW，因此本設計是爲一高增益高穩定度運算放大器。

關鍵字

運算放大器 ； 高增益 ； 高穩定 ； 疊接差動對 ； 疊接電流源

並列摘要

The development of the operation amplifier has a long history. This device can be applied to computers because of its high-gain and high-stability properties as well as its wide use in many applications. In this research a chip was designed and fabricated by 0.35 micron processes in which the high-gain purpose is achieved by using a cascade differential pair and a cascade current mirror. In a simulation to evaluate the designed chip, the gain reached 60.9 dB; the bandwidth, 289 MHz; the phase margin, 70°; and the power consumption, only 432.0 μW. Therefore, the designed operation amplifier can appropriately be called a high-gain and high-stability chip.

並列關鍵字

operation amplifier ； high-gain ； high-stable ； cascade differential pair ； cascade current mirror