Volume 34 Issue 7
Jul.  2008
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Song Dan, Zhang Xiaolin, Xia Wenboet al. Low voltage NMOS bulk-biased folded-cascode Gilbert mixer[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(7): 844-848. (in Chinese)
Citation: Song Dan, Zhang Xiaolin, Xia Wenboet al. Low voltage NMOS bulk-biased folded-cascode Gilbert mixer[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(7): 844-848. (in Chinese)

Low voltage NMOS bulk-biased folded-cascode Gilbert mixer

  • Received Date: 20 Jun 2007
  • Publish Date: 31 Jul 2008
  • By using the bulk-biased technology and folded-cascode approach, the problem of stacking input-and switching-transistors within 0.8V supply voltage was solved. A low voltage N channel metal-oxide-semiconductor (NMOS)bulk-biased folded-cascode Gilbert mixer (BBFCM) was implemented in a SMIC 0.18μm CMOS process. The mixer was used in some double-system receiver, which includes the global position system(GPS) system. In order to test the performance of the mixer, take the GPS signal for example:the frequency of the radio frequency (RF) signal, local oscillator (LO) and the intermediate frequency (IF) signal are 1575.42MHz,1570MHz and 5.42MHz, respectively. Measurement results show that the mixer features a conversion gain (Gc) of higher than 15.66dB, a dual sideband (DSB) noise figure of 16.5dB, an input 1dB compression point (P-1dB) of approximate -10dBm, and consumes approximate 1.07mW at a power supply voltage of 0.8V.Although the mixer consumes very low power, it still provides reasonable gain as well as linearity. The mixer can be applied to the electronics system within the realm of the aviation aerospace.

     

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