Precision rectifier circuit using current-mode approach and grounded resistors

ABSTRACT

This article is devoted to a new circuit proposal for precision rectification, which is designed using current feedback operational amplifiers. The new proposed circuit operation is clearly discussed, circuit analysis is performed and the workability is verified through extensive simulations carried out using PSPICE software. The in-built model library of used current feedback operational amplifier (namely, AD844) is used for simulating the proposed circuit. The performance metrics for the proposed circuit, which are verified includes signal precision of 100 mV, signal frequency of 1 MHz and linearity range of ±200 mV and output adjustment through auxiliary scaling block. Other features include low output impedance (100 Ω) for voltage mode cascading, high input impedance for one-half cycle of input, and employment of grounded resistors only. These features are apt for proposed circuit’s actual application perspective for voltage-mode analog design, since cascading requirements are easily fulfilled and use of grounded resistors benefit integration aspects.

KEYWORDS:

• Analog circuit design
• current-mode circuits

Acknowledgments

The author thanks anonymous reviewers for constructive comments and the Editor-in-Chief for his recommendation.

Disclosure statement

No potential conflict of interest was reported by the author.

Additional information

Notes on contributors

Sudhanshu Maheshwari

Sudhanshu Maheshwari is working as full Professor in Department of Electronics Engineering, AMU, India since 2013. He joined the department as Lecturer in 2000, prior to which he worked at HBTI, Kanpur, India for four years. He has published more than 150 research papers, mostly in referred international journals. His area of research is current mode analog circuit design. He also serves as invited reviewer for most of the high impact circuits and systems' journals.