CMOSインバータを用いた擬似差動OTAにおける同相入力の範囲の検討

• 吉田, 英一

• 谷本, 洋

抄録

We analyzed inverter-based pseudo-differential OTAs for their common-mode input range. In order to meet strong demands for OPA/OTAs operable from low power supply voltage, We investigated possibility of constructing inverter-based OTAs. CMOS inverters can operate from low power supply voltage; however, they have very narrow linear input range, and they are slngle-end amplifiers. Thus, we need common-mode suppression device when inverters are used to realize differential amplifiers. First, We analyzed a simple CMOS inverter and discussed requlrements to construct differential amplifier with inverters. Next, we analyzed three existing Pseudo-differential 0TAs, which are inverter-based OTAs, for their common-mode input ranges･ assuming 0.18 μm CMOS process. Finally, the common-mode input ranges are compared with that of a simple differential pair. We found that the inverter-based OTAs have comparable common-mode input range at 1.8 V power supply voltage; however, they have much wider common-mode input range at 1.0 V power supply voltage, than a simple differential pair. This shows the superiorlty Of inverter-based pseudo-differential Oms at low power supply voltage operation as low as 1 V･

収録刊行物

• 電気学会研究会資料. ECT, 電子回路研究会

  電気学会研究会資料. ECT, 電子回路研究会 ECT-06 (53), 7-10, 2006

  一般社団法人 電気学会

キーワード

• 同相入力電圧
• 動作点,擬似差動増幅器
• CMOSインバータ

詳細情報

• CRID: 1050571782530455808
• NII論文ID: 10018156706
• NII書誌ID: AN10441815
• Web Site: https://kitami-it.repo.nii.ac.jp/records/8570
• 本文言語コード: ja
• 資料種別: conference paper
• データソース種別:
  • IRDB
  • CiNii Articles