Low-noise high-gain large-bandwidth transimpedance ampli?er with cascode-type preamplifier for cryogenic STM

• 作者： 梁迎新 ( 1 ) ;
• 作者单位： 1.安阳师范学院物理与电气工程学院;
• 提交时间：2022-12-29

英文摘要:A low-noise high-gain large-bandwidth transimpedance amplifier (TIA) for cryogenic scanning tunneling microscope (CryoSTM) is proposed. The TIA connected with the tip-sample component in CryoSTM is called as CryoSTM-TIA. The CryoSTM-TIA has a transimpedance gain of 10 Gohm, a bandwidth of over 100 kHz, and an equivalent input noise current power spectral density less than 4 (fA)2/Hz at 100 kHz. The low inherent noise of the CryoSTM-TIA is due to its special design: (1) its pre-amplifier (Pre-Amp) is made of the low-noise cryogenic high electron mobility transistors; (2) the cascode-type configuration for the Pre-Amp is used to avoid Miller effect to reduce its input capacitance CA; (3) the capacitance of the cable connected the Pre-Amp input to the tip, i.e.CI, is minimized; (4) thermal noise sources, such as the feedback resistor, are placed in the cryogenic zone. Its high gain and large-bandwidth are realized together, due to the application of the frequency compensation in the feedback loop, the reduced CA, and the minimized CI. This apparatus can be used for fast high-energy-resolution measurements of scanning tunneling spectra for low conductivity materials, especially for measuring their scanning tunneling shot noise spectra.

• 来自： 梁迎新
• 期刊： Journal of Low Temperature Physics
• 分类： 工程与技术科学 >> 物理学相关工程与技术 工程与技术科学 >> 仪器仪表技术 电子与通信技术 >> 电子技术 物理学 >> 交叉学科物理及相关领域的科学与技术
• 说明： 已发表在Journal of Low Temperature Physics
• 投稿状态： 已在期刊出版
• 引用： ChinaXiv:202212.00180 (或此版本 ChinaXiv:202212.00180V1)
  (DOI:10.12074/202212.00180V1)
  (CSTR:32003.36.ChinaXiv.202212.00180.V1)
• 推荐引用方式：梁迎新.(2022).Low-noise high-gain large-bandwidth transimpedance amplifier with cascode-type preamplifier for cryogenic STM.Journal of Low Temperature Physics.CSTR:32003.36.ChinaXiv.202212.00180.V1 (点此复制)