A UWB-IR Transmitter With Digitally Controlled Pulse Generator

Norimatsu, Takayasu; Fujiwara, Ryosuke; Kokubo, Masaru; Miyazaki, Makoto; Maeki, Akira; Ogata, Yuji; Kobayashi, Shinsuke; Koshizuka, Noboru; Satoh, Ken

doi:10.1109/jssc.2007.897137

Cited by 132 publications

(71 citation statements)

References 9 publications

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“…However, the principle of this approach is validated with a measured pulse amplitude of 220 mV pp . Triangular pulses and a charge pump can also be used to vary the amplitudes of the elementary pulses (Norimatsu et al, 2007). The value of the current in the charge pump sets the amplitude of the triangle.…”

Section: Ultra Wideband 142mentioning

confidence: 99%

Design of CMOS UWB Pulse Generators

Gaubert¹,

Bourdel²

2010

Ultra Wideband

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Analysis of the current state of the artThe techniques normally used for generating pulses in low-cost monolithic technology (CMOS or BiCMOS) are different from those usually used in hybrid technologies. The latter mainly use edge combination methods generated from SRD diodes via quarter-wave lines or stubs (Jeongwoo Han et al., 2004). In a low-cost context, these techniques are not possible, as they cannot be integrated into the desired technologies. We shall present here only the following techniques:Baseband pulse transposition -Baseband pulse filtering -Synthesis by pulse combination.This analysis is performed using circuits that have been built and measured and that can be found in the literature. Before commencing this analysis, it is necessary to point out that the figure of merit often used in pulse generation is the energy consumed by the pulse. This criteria is subject to a caveat, as it often fails to take into account the power consumed between two pulses, which means it is only relevant if the system is combined with power management (sometimes difficult to achieve, depending on the topology of the circuit). This is why we shall be presenting, wherever possible, an estimate of the total energy consumed by the pulse (Ec t =P DC /D S ) that take into account the average consumption between two pulses. The energy consumed per pulse will then be used to quantify the energy consumed during the pulse alone (), and if this is not given, it will be approximated as follows: E c =P DC *. Moreover, in order to be completely suitable, the energy consumed by the total pulse must be compared to the energy of the pulse produced (E p ) by way of the energy efficiency per pulse (n=E p /Ec t ). As this energy is rarely given, it will be estimated by assuming that the pulse is a sinusoid modulated by a gate of width  and amplitude V p (E p =.V p 2 /2R 0 ).

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Section: Ultra Wideband 142mentioning

confidence: 99%

Design of CMOS UWB Pulse Generators

Gaubert¹,

Bourdel²

2010

Ultra Wideband

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“…The transmitter consists of a programmable delay line, an edge combiner, and a pad driver. The use of highly digital architectures realized in deep submicron CMOS processes allows for significant savings in energy while also requiring minimal die area [5], [6], [7], [8]. All of the proposed transmitter circuits are fully digital, and thus no analog bias currents are required and power is only consumed through digital switching events (CV 2 ) and subthreshold leakage current.…”

Section: A All-digital Transmittermentioning

confidence: 99%

Ultra-low-power UWB for sensor network applications

Mercier

Daly

Bhardwaj

et al. 2008

2008 IEEE International Symposium on Circuits and Systems (ISCAS)

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Abstract-Long distance, low data-rate UWB communication for sensor network applications requires a highly energy efficient transceiver combined with circuit and system-level optimizations to maximize range. A custom pulsed-UWB transceiver chipset in 90nm CMOS is presented that targets these aggressive specifications. The transceiver efficiently communicates at data rates from 0-to-16.7Mbps in three 550MHz-wide channels in the 3.1 to 5GHz band by using pulse position modulation (PPM). The transmitter uses an all-digital architecture and calibration technique to synthesize pulses with programmable width and center frequency. The non-coherent receiver operates at 0.65V and performs channel selection filtering, energy detection, and bit-slicing. As FCC regulations limit the maximum transmit power of UWB communication, a run-length limiting technique is presented to reduce energy requirements when maximizing range at low data rates.

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“…Furthermore, in multiband UWB RF system, the carrier frequency of UWB impulse should be changed to avoid the collisions among the users in different bands. As for the transmitter of IR-UWB transceiver, many literatures about the digitally synthesized topology and the switched VCO type have been recently reported [1][2][3][4][5][6]. The carrierfree digitally synthesized transmitter has some drawbacks such as the undesired digital noise and much more sidelobe due to the waveform shape while it has the merits of inductorless small chip area and low power consumption.…”

Section: Introductionmentioning

confidence: 99%

A 6.5 - 8.5 GHz CMOS UWB Transmitter Using Switched LC VCO

Park²,

Ha³

2015

JSTS:Journal of Semiconductor Technology and Science

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Abstract-A 6.5 -8.5 GHz CMOS UWB transmitter is implemented using 0.18 μm CMOS technology. The transmitter is mainly composed of switched LC VCO and digital pulse generator (DPG). Using RF switch and DPG, the uniform power and sidelobe rejection are achieved irrespective of the carrier frequency. The measured UWB carrier frequency range is 7 ~ 8 GHz and the pulse width is tunable from 1 to 2 ns. The measured energy efficiency per pulse is 2.1 % and the power consumption is 0.6 mW at 10 Mbps without the buffer amplifier. The chip core size is 0.72 mm 2 .

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A UWB-IR Transmitter With Digitally Controlled Pulse Generator

Cited by 132 publications

References 9 publications

Design of CMOS UWB Pulse Generators

Design of CMOS UWB Pulse Generators

Ultra-low-power UWB for sensor network applications

A 6.5 - 8.5 GHz CMOS UWB Transmitter Using Switched LC VCO

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