Future directions and technology requirements of wireless communications

Mochida, Y.; Takano, Takeshi; Gambe, H.

doi:10.1109/iedm.2001.979393

Cited by 3 publications

(2 citation statements)

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“…(2) and (5), G m can be obtained in terms of V offset , V inp and the aspect ratio of transistors M 1 and M 2 as…”

Section: Mixer Circuit Designmentioning

confidence: 99%

“…The downlink of cellular phones in the next generation of mobile communication systems is expected to use orthogonal frequency division multiplexing (OFDM) as the multiple access scheme and quadrature phase-shift keying (QPSK) data modulation, operating at a data rate of 100 Mbps [1,2]. This high data rate translates into high channel bandwidth which in turn requires good RF receiver front-end linearity to accommodate the dynamic range necessary to maintain the Bit-Error-Rate (BER) of the received signal.…”

Section: Introductionmentioning

confidence: 99%

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8 GHz 1V, CMOS quadrature downconverter for wireless applications

Mahmoudi

Salama

2006

Analog Integr Circ Sig Process

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The design and implementation of an 8 GHz CMOS quadrature downconverter, achieving simultaneously low voltage supply operation and good linearity is presented in this paper. This is achieved by relaxing the inherent tradeoff between power conversion gain and linearity governing all active mixers and implementing a mixer using a new version of the bias-offset technique. The quadrature generator uses active inductors embodied in the LO buffer, and provides easy tuning by relaxing the coupling between amplitude and phase tuning of the outputs. It also provides reduced power consumption by eliminating the buffers located between the quadrature generator and the mixers. A prototype implemented in a 0.18 µm CMOS technology occupies an area of 0.44 × 0.3 mm 2 , operates from a 1V power supply and features an IIP3 of +3.5 dBm, an IIP2 of better than +48 dBm, an input compression point of −5.5 dBm, a power conversion gain of +6.5 dB for the mixers and a quadrature phase and amplitude matching of better than 1.5 • and 1 dB respectively over a bandwidth of 100 MHz after tuning. The overall power consumption of the quadrature downconverter is 25.8 mW.

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“…(2) and (5), G m can be obtained in terms of V offset , V inp and the aspect ratio of transistors M 1 and M 2 as…”

Section: Mixer Circuit Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%