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this paper presents a novel instrumentation amplifier operating a differential current measurement from a resistive bridge. The proposed transimpedance instrumentation amplifier is constructed with two voltage opamps. One opamp is used to realize the current inversion and the second as a single input transimpedance amplifier. The resistive bridge is biased by a DC current and that it differs from...
For about a decade, Ultra-WideBand applications demonstrated its interest for radio and imaging applications in the [3.1–4.9 GHz] frequency band. In order to carry out such applications in other frequency domains, the instantaneous frequency of the impulse signal is commonly used. This paper describes the design of an Instantaneous Frequency Measurement system in order to show its feasibility for...
The goal of this paper is to present a scenario that optimizes a passive RFID data transmission without changing its standard. This procedure is based on the inventory process defined by the EPC Gen 2 protocol. An application of this procedure will be presented through a wireless temperature sensor concept and an ASIC implementation.
This paper presents some techniques to synthesize pulses in the context of IR-UWB. Pulse synthesizers are good candidates when different kinds of pulses are needed to comply with different standards or when the shape of the pulses needs to be modified. Two different approaches are described here. Voltage Controlled Delay Line (VCDL) based pulses are first described. For this family, two kinds of combiners...
This paper deals with the design of highly selective passive notch filter working at 2.4 GHz for 3.1–5 GHz UWB receiver system. The proposed filter aims to enable IEEE 802.11 b/g and UWB standard coexistence in the same terminal device. The filter topology is composed of two paths: the first path contains an all-pass function while the second path contains a band-pass one. By this way, the signal...
Healthcare applications requirements are presented in this paper and a state-of-the-art analysis shows that Impulse Radio Ultra-WideBand (IR-UWB) is particularly suitable in terms of energy efficiency for this type of short range communications for which different data rates are needed. Power saving strategies for emitters and receivers are then discussed and three examples of implementations are...
This paper presents a low power Impulse-Radio Ultra-WideBand (IR-UWB) receiver for low range and low data rates applications. The receiver adopts a non coherent detection with duty cycling that allows very low power consumption. The receiver operates in the high band of the UWB frequency band. It has been designed for the 7.2-8.5GHz bandwidth and covers channels 8, 9, 10, and 11 of the IEEE 802.15...
A fast I/Q imbalance compensation algorithm is presented. It is demonstrated through MATLAB simulations that with a few samples an image-to-signal ratio (ISR) lower than −25 dB was achieved. On the basis of digital processing of the received signal, this algorithm is compliant with low-cost and low-complexity wireless receivers because it does not require extra time and resources for calibration....
An ultra-wideband Voltage Controlled Oscillator (VCO) is presented in this paper. The circuit achieves fast startups and stops which allow wideband pulses to be generated. In addition, the VCO allows bipolar modulations as Binary Phase Shift Keying to be implemented without the need of a shaping circuit as a mixer. The proposed VCO has been integrated on a silicon area of 0.003mm2 in a 65nm CMOS technology...
A single chip CMOS 130 nm transceiver for UWB-IR communications was assembled and measured for further integration into a demonstrator aiming compatibility with the recently published IEEE802.15.6 standard for Body Area Networks. The transmitter achieves a 10.9 mA current consumption for the 15.6MHz pulse repetition frequency and 1.5V peak-to-peak voltage. The receiver is an innovative combination...
This paper is concerned with the analysis of the effect of packaging solution on the turn On/Off time of a Low Noise Amplifier (LNA) for 6–10 GHz duty cycled Impulse-Radio Ultra Wideband applications. The circuit turn On/Off time is conditioning by two terms. The first one is related to the time required by the internal LNA architecture to establish the biasing operating points. The second one is...
Actually, in the mobile application area, the reduction of power consumption appears to be a bottleneck when designing transceiver architectures for those systems. This is especially true when considering two large parts of the actual electronics market: Wireless Sensors Networks (WSN) and Internet of Things (IoT). Both of them require wireless communications and a large autonomy while being battery-powered.
This work presents a novel fast switching low power low noise amplifier (LNA) for 6–10 GHz ultra wide band applications using 0.13μm CMOS process from STMicroelectronics. The LNA operates at 1.2V. It achieves a high differential voltage gain about 46 dB with 4.4dB noise figure and a power consumption of 24mW. Fast on and off power switching is achieved by using differential amplifiers with DC coupled...
In this paper, the RF characteristics of the flexible Kapton-based substrate are investigated by using the microstrip ring resonator in order to characterize the relative permittivity (εr) and loss tangent (tanδ) of the substrate at Ultra Wide Band (UWB) range. A compact notch filter using the approach of phase cancellation between two signal paths is also reported here. The passive notch filter is...
The design of an UWB pulse generator is presented. The pulse generator is based on an elementary pulse combination technique which enables the emitted pulse to be precisely shaped. This technique is implemented with no inductor or passive network and can be used to ensure regulation compliance. This generator has been fully integrated in a 0.13 μm CMOS standard technology. Its area is 0.06mm2 only...
This paper presents the design of a fully integrated pulse generator which allows BPSK modulation to be implemented. This emitter is based on the response filter architecture and has been integrated in a 130nm CMOS technology with a 1.2V supply voltage on a silicon area of 2.88mm2. The bandwidth at −10dB is about 1.8GHz around 3.52GHz. The output dynamic voltage is equal to 1.72V peak to peak on a...
This paper presents an analysis of the power consumption of the UWB PHY layer of the IEEE 802.15.4a standard. This work focuses on the transmitter PHY layer implementation. The influence of the different modes settings on the power consumption is investigated. The considered implementations use an FPGA coupled with an UWB pulse generator implemented in an ASIC. The first PHY layer implementation is...
In this paper a novel tunable miniature active notch filter based on short circuited quarter-wavelength resonator is presented. This simple filter topology uses tunable Active Capacitance (AC) circuit and serves for trial purposes which are described below. Thanks to the use of a varactor diode in parallel within the AC circuit which allows a simultaneous tuning of the notch central frequency and...
A low power clock and data recovery (CDR) for low data rate applications is presented. The CDR circuit, implemented as a phase locked-loop (PLL), deals with very narrow pulses from an energy detector in a non-coherent Impulse Radio based Ultra Wide Band (IR-UWB) receiver. To considerably reduce the power consumption of such a receiver, the proposed circuit is intended to be used to turn off analog/RF...
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