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This paper presents a two-stage power-efficient class-AB operational transconductance amplifier (OTA) based on an adaptive biasing circuit suited to low-power dissipation and low-voltage operation. The OTA shows significant improvements in driving capability and power dissipation owing to the novel adaptive biasing circuit. The OTA dissipates only 0.4 µW from a supply voltage of ±0.6 V and exhibits excellent high driving, which results in a slew rate improvement of more than 250 times that of the conventional class-AB amplifier. The design is fabricated using 0.18-µm CMOS technology. [ABSTRACT FROM AUTHOR]

In this paper, an online education tool for assisting the teaching and learning of the IEEE 1500 standard testability method, used to support the testing of complex system-on-a-chip (SoC) integrated circuits (ICs), is developed and presented. The tool is an Internet browser based tool that supports the ability to investigate key aspects of the standard and its application to embedded core-based IC designs. The tool allows the user to create VHDL descriptions of both the test circuitry and the function circuitry via the Internet browser interface. The key considerations for developing this tool were to provide a computer based learning tool to support the teaching and learning of the standard and its application. This paper is an extended version of a paper presented at the EDUCON 2012 conference in April 2012. [ABSTRACT FROM AUTHOR]