Difference Transconductance Amplifiers and Their Applications
Haochen Yan · Applied and Computational Engineering · 2025
As technology advances, the size requirements for Complementary Metal Oxide Semiconductors (CMOS) continue to decrease, creating the need for emerging components to meet the requirements. These components are numerous and complex, with many uses and different functions, which are easy to confuse for scholars. This article reviews existing literature to specifically introduce two differential transconductance amplifiers, namely Voltage Differential Transconductance Amplifier (VDTA) and Current Differential Transconductance Amplifier (CDTA), This paper also outlines their working principles and their respective applications, such as VDTA used as a filter and four-quadrant multiplier and divider, and CDTA used as a modulator and biosensor. Additionally, these two amplifiers can be combined as a memristor. By reviewing these existing experiments, readers can get some specific knowledge that can help them distinguish various transconductance amplifiers, as well as understand the directions and fields in which these amplifiers can be applied. Finally, it points out that despite the promising development of VDTA and CDTA, the scenarios and conditions for their use still need to be further studied. It also proposes future prospects for these technologies.