IEEE Journal of Solid-State Circuits · 2003 · 57 citations · 14 references
EngineeringCommunicationElectrical EngineeringAnalog ElectronicsDigital CommunicationMicrowave EngineeringAnalog Integrated CircuitsAnalog IntegrationDigital Signal ProcessingMixed-signal Integrated Circuit DesignRadio-frequency Integrated CircuitsReceiver SystemsAutomatic Gain ControlDigital BroadcastingGain ControlNoise FigureRadio-frequency Integrated Circuit DesignReceiver DesignReceiver Front-endsTransceiver Architectures
A new architecture is presented for a single-chip tuner for digital terrestrial television, based on existing double conversion and direct conversion topologies. The new design forms part of a mixed-signal Digital Video Broadcasting-Terrestrial (DVB-T) receiver system, employing digital signal processing at baseband to ensure minimal performance requirements for the analog circuitry. To evaluate the potential performance of this new tuner/receiver system, high-level system simulations have been performed, followed by the construction of a prototype DVB-T receiver using a custom-designed analog ASIC which integrates all analog tuner blocks (including channel filtering) on one chip. Measured results from this chip, implemented in a 20-GHz bipolar technology, show an overall third-order input referred intercept point of 116 dBμV, a noise figure of 14 dB and an automatic gain control range of 71.4 dB, drawing 250 mA at a 5-V supply.
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