A simplified design methodology for MOSFET-only wideband mixer

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In this paper we present a MOSFET-only implementation of a wideband Gilbert Cell. The circuit uses a commongate topology for a wideband input match, capable to cover the Wireless Medical Telemetry Service (WMTS) frequency bands of 600 MHz and 1.4 GHz. In this circuit the load resistors are replaced by transistors in triode region, to reduce area and cost, and minimize the effects of process and supply variations and mismatches. In addition, we obtain a higher gain for the same DC voltage drop, with a reduced impact on the noise figure (NF). The performance of this topology is compared with that of a conventional mixer with load resistors. Simulation results show that a peak gain of 20.6 dB (about 6 dB improvement) and a NF about of 11 dB for the 600 MHz band. The total power consumption is 3.6 mW from a 1.2 V supply.

Original languageEnglish
Pages (from-to)503-509
Number of pages7
JournalInternational Journal of Electronics and Telecommunications
Issue number4
Publication statusPublished - 1 Dec 2011


  • Active mixers
  • CMOS mixers
  • Gilbert cell
  • MOSFET-only circuits
  • Wideband mixers


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