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Current source; DTMOS; noise figure; switched biasing; UMC.

In this paper, dynamic threshold MOSFET (DTMOS) based down conversion Gilbert mixer is proposed for medical implant communication services (MICS) receiver design using UMC 180 nm CMOS process. The current source helpers and switched biasing technique are used to progress the performance of theDTMOS based Gilbert mixer. The proposed design operates at a radio frequency (RF) of 403 MHz with a maximum conversion gain of 12.5 dB at 5 dBm of LO power. The 1 dB compression point and third order input intercept point (IIP3) for the proposed design is - 8.79 dBm and 3.92 dBm respectively, with a noise figure(NF) of 6.6 dB at an intermediate frequency (IF) of 10 MHz. This design circuit works in 0.9 V supply voltage and consumes a dc power of 0.55 mW with the chip area of 0.035 9 0.037 mm2. So, this design with high conversion gain and better noise performance is a suitable block for MICS applications.

SHASANKA SEKHAR ROUT¹ KABIRAJ SETHI¹

1. Department of Electronics and Telecommunication Engineering, VSS University of Technology, Burla 768018, India

Published

January 2020

Manuscript received

12 October 2018

Manuscript revised

16 October 2019

Accepted

20 October 2019

Final version published online

21 December 2019