A Common Source Input Cross Coupled Quad CMOS Mixer*

  • Authors:

  • P. J. Sullivan;B. A. Xavier;W. H. Ku

  • Affiliations:

  • Department of Electrical and Computer Engineering, University of California, San Diego, CA, 92093-0408;Department of Electrical and Computer Engineering, University of California, San Diego, CA, 92093-0408;Department of Electrical and Computer Engineering, University of California, San Diego, CA, 92093-0408

  • Venue:
  • Analog Integrated Circuits and Signal Processing - Special issue: papers from the 40th midwest symposium
  • Year:
  • 1999

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Abstract

A CMOS doubly balanced mixer circuit is implemented with a source follower input and a cross coupled mixing quad. The circuit employs an all N-channel configuration and is suitable for high frequency applications. As a down-converter with an RF input of 2.0 GHz and an IF output of 200 MHz, the mixer demonstrates 9 dB of conversion loss with a corresponding input referred third order intercept of 0 dBm. As an up-converter with an IF input frequency of 400 MHz and an RF output of 2.4 GHz, the mixer demonstrates 14 dB of conversion loss.