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Design of a 65 nm CMOS 8 GHz wideband: track-and-hold, for radio astronomy and cosmology applications

D. Mattos P. Hellmuth 1 Cyril Recoquillon S. Gauffre 2, 3, 4, 5, 6 Ph. Cais 5, 6, 2, 3, 4 J.-L. Pedroza 1 J.-B. Be'Gueret Alain Baudry 2, 3, 4, 5, 6
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
Abstract : In modern millimeter and sub-millimeter communication systems, particle physics, neutrino astronomy, and for passive applications in radio astronomy or remote atmospheric sensing, the trend is to eliminate analog functional blocks, such as mixers and filters, by converting the signal into the digital domain as early as possible in the processing chain. Therefore, fast analog-to-digital converters (ADC) are needed. Track-and-hold (TAH) circuits can reduce time constraints by holding the analog input value while comparators are sampled, in order to minimize the aperture time errors. This article describes the design of a TAH using the 65 nm CMOS technology from STMicroelectronics. A fully differential architecture has been adopted. The circuit exhibits a −3 dB input bandwidth wider than 8 GHz. At 8 GHz, the maximum sampling frequency, the measured overall power consumption and gain are 178 mW and −2 dB, respectively. The TAH core dissipates around 40 mW. The measured total harmonic distortion (THD) at Nyquist sampling conditions is about −37 dB. The circuit die area is 1.1 mm². Page %P Loading... Close Plain text Download PDF (1 228 KB) Analog Integrated Circuits and Signal Processing Analog Integrated Circuits and Signal Processing Look Inside Share Share this content on Facebook Share this content on Twitter Share this content on LinkedIn Within this Article: 1. Introduction 2. Track and hold circuit design 3. Implementation 4. Circuit performance 5. Conclusion 6. References 7. References Other actions * Export citations * Register for Journal Updates * About This Journal * Reprints and Permissions
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Submitted on : Monday, December 17, 2012 - 12:25:40 PM
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D. Mattos, P. Hellmuth, Cyril Recoquillon, S. Gauffre, Ph. Cais, et al.. Design of a 65 nm CMOS 8 GHz wideband: track-and-hold, for radio astronomy and cosmology applications. Analog Integr Circ Sig Process, 2012, 73, pp.779-787. ⟨10.1007/s10470-012-9915-7⟩. ⟨in2p3-00762427⟩



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