Shahed University

An Ultra?Low Power Programmable Current Gain Amplifier with a Novel Current Gain Controller Structure for IoT Applications

Ali Reza Ghorbani | M. B. Ghaznavi-Ghoushchi

URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=137718
Date :  2020/07/29
Publish in :    Wireless Personal Communications

Link :  https://doi.org/10.1007/s11277-020-07547-0
Keywords :Internet of Things (IOT), Programmable gain amplifier (PGA), Current mode, FVF structure, Low power, Subthreshold region

Abstract :
In this paper a novel structure is introduced for programming current gain amplifier that works in near subthreshold regime. The flipped voltage follower is utilized to achieve different gain and the subthreshold MOS is using in order to decrease power consumption. Class AB structure is used to attain a wide dynamic range. These techniques are led to achieving low complexity and low area and ultra-low power compare to previous PGA. Moreover, by using the resistor the current is converted to voltage in output node, hence, the voltage gain is achieved simply by using this structure. The post-layout simulation result shows the proposed structure could provide current gain from 0 to 25 dB, while constant bandwidth of 10 MHz. However, the power consumption of the proposed PCGA is only 120 nW with ± 0.6 V supply. These results are verified by the post-simulations of the proposed PCGA that performed by 65 nm standard CMOS technology.