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Analog Impairments Correction of Quadrature Mixers in Stand Alone Receivers

Monday, October 17, 2011 -
4:00pm to 4:50pm
KEC 1001

Speaker Information

Radu Fetche
IC Design Engineer
Rohde and Schwarz USA


<p>In a complex radio communication system most of the radio’s impairments are digitally corrected, assisted by the digital <span data-scayt_word="baseband" data-scaytid="1">baseband</span> processor/controller. There are applications where the radio is placed on a separate die from the digital <span data-scayt_word="baseband" data-scaytid="2">baseband</span> processor for performance or business related reasons. These stand alone radios are analog in nature with digital content only in the ADC, <span data-scayt_word="baseband" data-scaytid="3">baseband</span> filtering and <span data-scayt_word="PLL" data-scaytid="4">PLL</span>.</p> <p><br> This talk will focus on the techniques used for correction of the <span data-scayt_word="quadrature" data-scaytid="5">quadrature</span> mixer impairments in the analog domain. Several options are presented to correct for phase and amplitude imbalance, second and third order nonlinearity and the local oscillator leakage.</p>

Speaker Bio

Radu Fetche is an IC design engineer at Rohde and Schwarz USA in Beaverton OR. Prior to joining Rhode and Schwarz USA, he was a senior design engineer with the TV and Radio Group of MAXIM Integrated Products in Hillsboro OR. His research focuses on high-performance microwave and radio circuits for communications and measurement applications.