Study of Suppressing Zero Point Drift for Direct Coupling Amplifier

• Main Authors: Yung-Hsien Hsieh, 謝永賢
• Other Authors: Ying-Shing Shiao
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/62921690281469067536

碩士 === 國立彰化師範大學 === 電機工程學系 === 96 === This thesis designs an integrator to measure the dc components of the direct coupled amplifier and feedback to the amplifier input node to suppress the zero-point drift so that there is no dc component at the amplifier output. The proposed circuits can not only sense the zero-drift of the amplifier but also dynamically compensate the level shift preventing feedback circulation from causing parts burning. The simulation and experimental results illustrate the integrator circuit with the ability to suppress the zero drift of the direct coupled amplifier that increase the lower frequency response from 504 Hz to 9 Hz.