Open AccessHigh CMRR Voltage Mode Instrumentation Amplifier Using a New CMOS Differential Difference Current Conveyor Realization
Author(s) -
Thouraya Ettaghzouti,
Néjib Hassen
Publication year - 2020
Publication title -
international journal of systems applications, engineering and development
Language(s) - English
Resource type - Journals
ISSN - 2074-1308
DOI - 10.46300/91015.2020.14.13
Subject(s) - current conveyor , cmos , instrumentation amplifier , biasing , electrical engineering , electronic circuit , electronic engineering , amplifier , common mode rejection ratio , differential amplifier , voltage , operational amplifier , computer science , engineering , resistor
This paper describes a new CMOS realization of differential difference current conveyor circuit. The proposed design offers enhanced characteristics compared to DDCC circuits previously exhibited in the literature. It is characterized by a wide dynamic range with good accuracy thanks to use of adaptive biasing circuit instead of a constant bias current source as well as a wide bandwidth (560 MHz) and a low parasitic resistance at terminal X about 6.86 Ω. A voltage mode instrumentation amplifier circuit (VMIA) composed of a DDCC circuit and two active grounded resistances is shown as application. The proposed VMIA circuit is intended for high frequency applications. This configuration offers significant improvement in accuracy as compared to the state of the art. It is characterized by a controllable gain, a large dynamic range with THD less than 0.27 %, a low noise density (22 nV/Hz1/2) with a power consumption about 0.492 mW and a wide bandwidth nearly 83 MHz. All proposed circuits are simulated by TSPICE using CMOS 0.18 μm TSMC technology with ± 0.8 V supply voltage to verify the theoretical results.