Continuous‐time four‐quadrant modulator with inherent PVT cancellation. Issue 10 (1st May 2016)

• Record Type: Journal Article
• Authors: Al‐Tamimi, K.; Thiyagarajan, P.; El‐Sankary, K.
• Is Part Of: Electronics letters. Volume 52:Issue 10(2016)
• Page Start: 807
• Page End: 808
• Publication Date: 2016-05-01
• Subjects: modulators -- voltage multipliers -- low‐power electronics; continuous‐time four‐quadrant modulator -- PVT cancellation -- continuous‐time four‐quadrant multiplier -- subthreshold region -- process‐voltage‐temperature variation cancellation -- low voltage supply -- ultra‐low power dissipation -- anti‐log cancellation technique -- bio‐potential acquisition systems -- input‐output signals -- frequency doubler -- linear variable gain amplifier; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2016.0347
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A continuous‐time four‐quadrant multiplier in subthreshold region is presented. Besides its simplicity, the structure features inherent process–voltage–temperature (PVT) variation cancellation while working under low voltage supply and dissipating an ultra‐low power. The PVT variation was alleviated through an inherent log/anti‐log cancellation technique, making it as a good candidate for bio‐potential acquisition systems. The input and output signals are currents resulting in a wider bandwidth and larger dynamic range compared with the voltage‐mode counterparts. The circuit is versatile and can be configured as a modulator, frequency doubler, and linear variable gain amplifier as shown in theory and simulation results.