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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...
Cardiovascular Diseases (CVD) causes as many deaths as cancer in Europe. A method to detect them consists in tracking the heartbeat rate from ECG signal. In this case, QRS complexes have to be localized and it is proposed here to use an energy detector to enable this. It can be integrated in an analog circuit and can also address low power and low cost applications such as consumer embedded electronics...
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...
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...
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.
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...
A Digital CMOS BPSK modulator is presented in this paper. PSPICE simulation results of the proposed modulator are presented using BSIM3v3 transistors process parameter of the TSMC-0.18μm 1.8V CMOS technology. Between 1.6V to 1.8V supply voltage, the carrier frequency of the proposed modulator is scalable between 2.3GHz and 2.6GHz. Due to its symmetry, the proposed digital BSK modulator is fully differential.
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...
The design of a remotely UHF powered UWB transmitter is presented in 0.13µm CMOS standard process. Power harvesting unit is based on a Dickson voltage multiplier and UWB pulse generator uses filtered combined edge method. Multi-Vt technique and CMOS logic allows pulse generator power consumption between two consecutive pulses to be reduced enough to be remotely powered. It achieves FCC compliant pulses...
A low power CMOS energy detector for 3.1-10.6 GHz non-coherent impulse-radio UWB receivers is implemented in a 0.13 μm CMOS process. The detector architecture is based on a squarer circuit realized with MOS transistors biased in the sub-threshold region. The squared signal is integrated using a low pass amplifier that allows the receiver gain to be optimized. A comparator with a tunable threshold...
This paper presents the design of a fully integrated ultra-wideband (UWB) pulse generator for the Federal Communications Commission (FCC) 3.1-10.6-GHz band. This generator is reserved for medium rate applications and achieves pulses for an on-off keying (OOK) modulation, pulse position modulation, or pulse interval modulation. This UWB transmitter is based on the impulse response filter method, which...
The design of a fully tunable pulse generator using only logic cells is presented and simulated with 0.13µm standard CMOS process. The generator is based on the elementary pulse combination and can synthesize different UWB pulse shapes. The generator uses logic gates to achieve the elementary pulses and a H-bridge to make the combination which leads to a zero DC power consumption. To achieve FCC compliant...
The design of an UWB pulse generator is presented in the context of low cost applications. The pulse generator is fully integrated in a 0.13 mum CMOS technology and achieves 1 Vpp magnitude pulses with only 2.25 pJ of energy consumed by pulse and 1.2 V voltage supply. The generation method used in this design is well suited for packaged IC using wire bond interconnections. Tow methods of interconnection...
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