Multi-function Current Differencing Cascaded Transconductance Amplifier (MCDCTA) and Its Application to Current-Mode Multiphase Sinusoidal Oscillator

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• 作者：Jie Jin
• 关键词：Current ; mode circuit ; Multifunction current differencing cascaded transconductance amplifier (MCDCTA) ; Multiphase sinusoidal oscillator (MSO) ; Analog integrated circuit
• 刊名：Wireless Personal Communications
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：86
• 期：2
• 页码：367-383
• 全文大小：2,047 KB
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• 作者单位：Jie Jin (1)
  
  1. College of Information Science and Engineering, Jishou University, Jishou, 416000, People’s Republic of China
  
• 刊物类别：Engineering
• 刊物主题：Electronic and Computer Engineering
  Signal,Image and Speech Processing
  Processor Architectures
  
• 出版者：Springer Netherlands
• ISSN：1572-834X

文摘

In this study, a new versatile active element, namely multifunction current differencing cascaded transconductance amplifier (MCDCTA) is proposed. The proposed MCDCTA enjoys the advantages of low voltage, low-input and high-output impedance, wide bandwidth etc., and it simplifies the design of the current-mode analog signal processing circuit greatly, especially the design of high-order filter and oscillator circuits. Moreover, an example, a new current-mode multiphase sinusoidal oscillator (MSO) using the proposed MCDCTA is described in this paper. The proposed MSO consists only one MCDCTA and minimum grounded passive elements, it could provide 2n (n ≧ 2) output current signals with equally phase difference, and the output current signals are all at high output impedance terminals. The oscillation condition and the oscillation frequency of the MSO could be linearly and electronically adjusted by controlling the bias currents of MCDCTA, and it is suitable for variable frequency oscillator application. The operation of the proposed oscillator has been verified through PSPICE simulation and experimental results. Keywords Current-mode circuit Multifunction current differencing cascaded transconductance amplifier (MCDCTA) Multiphase sinusoidal oscillator (MSO) Analog integrated circuit