IEEE Microwave and Wireless Components Letters · 2006 · 43 citations · 6 references
EngineeringElectrical EngineeringLow-power DesignMicroelectronicsSemiconductor DevicesDigital Integrated Circuit DesignDigital Integrated CircuitsHigh-frequency Semiconductor DevicesIntegrated Circuit DesignLow-power Digital Circuit DesignRadio-frequency Integrated CircuitsDigital Logic CircuitsDirect Digital SynthesisDynamic RangeFrequency SynthesisFrequency SynthesizersHeterojunction Bipolar TransistorsLow-power SynthesisRadio-frequency Integrated Circuit Design
A direct digital synthesizer (DDS) implemented in InP double heterojunction bipolar transistor (DHBT) technology is reported. The DDS has a ROM-less architecture and instead uses digital logic for phase conversion. The DDS operates up to a 13 GHz clock rate and is capable of synthesizing output frequencies up to 6.5 GHz. Measured spurious free dynamic range (SFDR)ranged from 34 dBc at low frequency control words (FCWs) to 26.67 dBc at high FCWs. The test circuit is implemented with 1646 transistors and consumes 5.42W of power
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