Abstract
This paper presents a negative impedance converter (NIC) based on graphene field effect transistors (GFETs) for VHF applications. The NIC is designed following Linvill’s open circuit stable (OCS) topology. The DC modelling parameters of GFET are extracted from a device measured by Meric et al. [IEEE Electron Devices Meeting, 23.2.1 (2010)] Estimated parasitics are also taken into account. Simulation results from Keysight Advanced Design System (ADS) show good NIC performance up to 200 MHz and the value of negative capacitance is directly proportional to the capacitive load. In addition, it has been shown that by varying the supply voltage the value of negative capacitance can also be tuned. The NIC stability has been tested up to 2 GHz (10 times the maximum operation frequency) using Nyquist stability criterion to ensure there are no oscillation issues.
Highlights
Jing Tian,a Deepak Singh Nagarkoti,a Khalid Z
This paper presents a negative impedance converter (NIC) based on graphene field effect transistors (GFETs) for VHF applications
The DC modelling parameters of GFET are extracted from a device measured by Meric et al [IEEE Electron Devices Meeting, 23.2.1 (2010)] Estimated parasitics are taken into account
Summary
Jing Tian,a Deepak Singh Nagarkoti,a Khalid Z. (Received 4 April 2016; accepted 24 May 2016; published online 1 June 2016) This paper presents a negative impedance converter (NIC) based on graphene field effect transistors (GFETs) for VHF applications. Simulation results from Keysight Advanced Design System (ADS) show good NIC performance up to 200 MHz and the value of negative capacitance is directly proportional to the capacitive load.
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