IEEE Journal of Solid-State Circuits · 2001 · 58 citations · 12 references
EngineeringElectrical EngineeringAnalog ElectronicsMicroelectronicsSemiconductor DevicesComplementary Metal-oxide-semiconductor TechnologyHigh-frequency Semiconductor DevicesIntegrated Circuit DesignMicrowave Integrated CircuitsMillimeter-wave CommunicationsRadio-frequency Integrated CircuitsBandwidthHigh-frequency ElectronicsLinearityMonolithic Microwave Integrated Circuit DesignRadio-frequency Integrated Circuit DesignSamplingSchottky Barrier DiodesSige Bicmos Design
High-performance multistage data converters and sub-sampling frequency downconverters typically require track and hold amplifiers (THAs) with high sampling rates and high linearity. This paper presents a THA for sub-sampling communications applications based on a diode bridge design with high-speed Schottky diodes and an improved current source approach for enhanced linearity. Implemented in a 45-GHz BiCMOS Si/SiGe process, this IC has an input bandwidth in excess of 10 GHz, consumes approximately 550 mW, and can accommodate input voltages up to 600 mV. With an input frequency of 8.05 GHz and a sampling frequency of 4 GHz, the THA has an IIP3 of 26 dBm and a spurious free dynamic range of 30 dB.
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