A Low-Offset High CMRR Current-Mode Instrumentation Amplifier Using Differential Difference Current Conveyor
Küçük Resim Yok
Tarih
2014
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IEEE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Current-mode circuits are generally desirable for their high bandwidth. Moreover, current-mode instrumentation amplifiers have an advantage over voltage-mode counterparts that, they do not require precise resistor matching for a high CMRR. In this work, a current-mode instrumentation amplifier is proposed by employing Differential Difference Current Conveyor (DDCC). The proposed structure employs a single DDCC element, and an operational amplifier is used as a buffer or a final amplifier stage. After the explanation of the circuit, redundant output feedback (ROFB) circuit is presented to increase CMRR and to overcome the offset voltage at the output of the DDCC. The DDCC element is designed with 0.35 mu m technology and the proposed circuits are simulated using HSPICE. The proposed circuit with the feedback path provides more than 110 dB CMRR value at 1 MHz which is much higher than other current-mode implementations.
Açıklama
2014 21st IEEE International Conference on Electronics, Circuits and Systems (ICECS) -- DEC 07-10, 2014 -- Marseille, FRANCE
Anahtar Kelimeler
Current-Mode Circuits, Instrumentation Amplifier, DDCC, Current-Conveyor, CMRR
Kaynak
2014 21st Ieee International Conference On Electronics, Circuits And Systems (Icecs)
WoS Q Değeri
N/A
