IEEE Journal of Solid-State Circuits · 2007 · 105 citations · 11 references
EngineeringElectrical EngineeringAnalog ElectronicsMicrowave EngineeringRange ImprovementCmos Circuit DesignFeedback AmplifiersImpedance MatchingImpedance Matching CircuitsMixed-signal Integrated Circuit DesignRadio-frequency Integrated CircuitsBroadband Impedance MatchingCmos Analog Integrated CircuitsGain ControlInput Impedance MatchingLinearityMaximum GainMobile TelevisionTransconductance
A high dynamic range RF variable gain amplifier (RFVGA) suitable for mobile digital television (DTV) tuners is presented. Variable gain is achieved using a capacitive attenuator and current-steering transconductance (G <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> ) stages, which provide high linearity with relatively low power consumption. A novel broadband input impedance matching scheme based on resistive shunt-feedback is proposed. This scheme allows the RFVGA to achieve a low noise figure. A gain control technique suitable for CMOS current-steering variable gain amplifiers is described; it features 1 dB per step resolution, independent of process and temperature variations. The chip is fabricated in six-metal 0.18mum CMOS technology and consumes 12.2mA current from 1.8V supply. The RFVGA achieves 16dB maximum gain, 33dB gain control range, a 4.3dB noise figure, and an IIP3 higher than 25dBm
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A direct-conversion receiver for DVB-H
Philippe Antoine, P. Bauser, H. Beaulaton et al. · IEEE Journal of Solid-State Circuits · 2005 · 104 citations
M. Dawkins, A.P. Burdett, N. Cowley · IEEE Journal of Solid-State Circuits · 2003 · 57 citations