Single-Phase Energy Metering Chip with Built-in Calibration Function

• Youn-Sung Lee,
• Jeongwook Seo,
• Jungwook Wee,
• Mingoo Kang,
• Dong Ku Kim,

Vol. 9, No. 8, August 30, 2015
10.3837/tiis.2015.08.021, Download Paper (Free):

• energy meter
• analog front end
• computation engine
• Calibration
• SoC

Abstract

This paper presents a single-phase energy metering chip with built-in calibration function to measure electric power quantities. The entire chip consists of an analog front end, a filter block, a computation engine, a calibration engine, and an external interface block. The key design issues are how to reduce the implementation costs of the computation engine from repeatedly used arithmetic operations and how to simplify calibration procedure and reduce calibration time. The proposed energy metering chip simplifies the computation engine using time-division multiplexed arithmetic units. It also provides a simple and fast calibration scheme by using integrated digital calibration functionality. The chip is fabricated with 0.18-･m six-layer metal CMOS process and housed in a 32-pin quad-flat no-leads (QFN) package. It operates at a clock speed of 4096 kHz and consumes 9.84 mW in 3.3 V supply

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