65nm CMOS Burst Generator for Ultra-Wideband Low Data Rate Systems

Marchaland, D.; Badets, Franck; Villegas, Martine; Belot, Didier

doi:10.1109/rfic.2007.380829

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…is the worst-case effective burst width and is given by (12) Here, is the inter-burst chip sequence with the worst-case peak power, which occurs when the chip sequence contains a minimum number of phase inversions. For single-pulse transmissions,…”

Section: B Predicting Pulsed-uwb Measurement Resultsmentioning

confidence: 99%

“…There are two distinct methods for generating UWB pulses using highly digital circuits: exciting a delay line [8], [10], or modulating the output of an oscillator [11], [12]. A ring oscillator-based solution can be advantageous since it requires fewer delay stages than an entire delay line, is highly amenable to bursting multiple pulses back-to-back, and can be used in conjunction with an integrated down-converting receiver.…”

Section: An Energy-efficient All-digital Uwb Transmittermentioning

confidence: 99%

“…A ring oscillator-based solution can be advantageous since it requires fewer delay stages than an entire delay line, is highly amenable to bursting multiple pulses back-to-back, and can be used in conjunction with an integrated down-converting receiver. For spectral compliance purposes, pulse shaping may be implemented in the delay-line approach by using variable current sources at the output of each delay cell [13]; ring oscillator-based designs can instead dynamically activate high-speed drivers in parallel [12].…”

Section: An Energy-efficient All-digital Uwb Transmittermentioning

confidence: 99%

See 2 more Smart Citations

An Energy-Efficient All-Digital UWB Transmitter Employing Dual Capacitively-Coupled Pulse-Shaping Drivers

Mercier

Daly

Chandrakasan

2009

IEEE J. Solid-State Circuits

117

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This paper presents an all-digital, non-coherent, pulsed-UWB transmitter. By exploiting relaxed center frequency tolerances in non-coherent wideband communication, the transmitter synthesizes UWB pulses from an energy-efficient, single-ended digital ring oscillator. Dual capacitively coupled digital power amplifiers (PAs) are used in tandem to attenuate low frequency content typically associated with single-ended digital circuits driving single-ended antennas. Furthermore, four level digital pulse shaping is employed to attenuate RF sidelobes, resulting in FCC compliant operation in the 3.5, 4.0, and 4.5 GHz IEEE 802.15.4a bands without the use of any off-chip filters or large passive components. The transmitter is fabricated in a 90 nm CMOS process and occupies a core area of 0.07 mm 2. The entirely digital architecture consumes zero static bias current, resulting in an energy efficiency of 17.5 pJ/pulse at data rates up to 15.6 Mb/s.

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Section: B Predicting Pulsed-uwb Measurement Resultsmentioning

confidence: 99%