A 90-NM CMOS low-power down-converter for 3- to 5-GHz ultra-wideband wireless systems

2008 ◽  
Vol 50 (10) ◽  
pp. 2577-2581
Author(s):  
Giuseppina Sapone ◽  
Giuseppe Palmisano
Keyword(s):  
Low Power ◽  
Wireless Systems ◽  
Ultra Wideband ◽  
5 Ghz

A linear, ultra wideband, low-power, 2.1-5 GHz, VCO

2010 ◽  
pp. n/a-n/a ◽  
Author(s):  
Athanasios Tsitouras ◽  
Fotis Plessas ◽  
Grigorios Kalivas
Keyword(s):  
Low Power ◽  
Ultra Wideband ◽  
5 Ghz

scholarly journals A Low-Power Squaring Circuit with Regulated Output and Improved Settling Time in 180 nm CMOS for 3–5 GHz IR-UWB Applications

2021 ◽  
Vol 19 ◽  
pp. 79-84
Author(s):  
Daniel Schrüfer ◽  
Jürgen Röber ◽  
Timo Mai ◽  
Robert Weigel
Keyword(s):  
Transfer Function ◽  
Power Consumption ◽  
Low Power ◽  
Cmos Technology ◽  
Settling Time ◽  
Ultra Wideband ◽  
Quadratic Term ◽  
Slew Rate ◽  
Data Rates ◽  
5 Ghz

Abstract. This paper demonstrates a low-power squaring circuit for 3–5 GHz non-coherent Impulse-Radio Ultra-Wideband (IR-UWB) receivers for Pulse Position Modulation (PPM) in a low-cost 180 nm CMOS technology. The squaring, which is the key element in typical IR-UWB receivers, is performed exploiting the non-linear transfer function of a MOS transistor. For a high gain at low power consumption the transistor is biased in the moderate inversion region, where the second-order derivative of the transconductance gm and, as a result, the quadratic term in the transfer function reaches a maximum. A control loop was implemented to set the dc output voltage to a defined value and thus to allow a comparison of the squarer output signal with a defined threshold voltage, which can easily be set and adjusted (e.g. by a DAC). To speed up the settling time of the output and hence to reach higher data rates, a novel slew-rate booster is implemented at the output. Thereby, the squarer is capable of data rates of up to 15.6 Mbit s−1, which is more than two times higher compared to the circuit without the slew-rate booster, while only consuming 72.4 µW in addition. In the extracted post-layout simulations the whole circuitry consumes 724 µA at a 1.8 V power supply, resulting in a power consumption of 1.3 mW.

A Low-Power Low-Data Rate Impulse Radio Ultra-Wideband (IR-UWB) Transmitter

2017 ◽  
Vol 26 (03) ◽  
pp. 1740013 ◽  
Author(s):  
Ifana Mahbub ◽  
Samira Shamsir ◽  
Syed K. Islam
Keyword(s):  
Low Power ◽  
Biomedical Application ◽  
Short Pulse ◽  
Impulse Radio ◽  
Data Rate ◽  
Ultra Wideband ◽  
Modulation Scheme ◽  
Sleep Mode ◽  
Operating Voltage ◽  
5 Ghz

A low-power and low-data-rate (100 kbps) fully integrated CMOS impulse radio ultra-wideband (IR-UWB) transmitter for biomedical application is presented in this paper. The transmitter is designed using a standard 180-nm CMOS technology that operates at the 3.1-5 GHz frequency range with more than 500 MHz of channel bandwidth. Modulation scheme of this transmitter is based on on-off keying (OOK) in which a short pulse represents binary “1” and absence of a pulse represents binary “0” transmission. During the ‘off’ state (sleep mode) the transmitter consumes only 0.4 μW of power for an operating voltage of 1.8 V while during the impulse transmission state it consumes a power of 36.29 μW. A pulse duration of about 3.5 ns and a peak amplitude of the frequency spectrum of about -47.8 dBm/MHz are obtained in the simulation result which fully complies with Federal Communication Commission (FCC) regulation.

3D localization for subcentimeter-sized devices

2021 ◽  
Vol 64 (3) ◽  
pp. 117-125
Author(s):  
Rajalakshmi Nandakumar ◽  
Vikram Iyer ◽  
Shyamnath Gollakota
Keyword(s):  
Metropolitan Area ◽  
Ultra Wideband ◽  
Phase Information ◽  
Noise Floor ◽  
Localization System ◽  
Coin Cell ◽  
3D Localization ◽  
Button Cell ◽  
Iot Devices ◽  
5 Ghz

The vision of tracking small IoT devices runs into the reality of localization technologies---today it is difficult to continuously track objects through walls in homes and warehouses on a coin cell battery. Although Wi-Fi and ultra-wideband radios can provide tracking through walls, they do not last more than a month on small coin and button cell batteries because they consume tens of milliwatts of power. We present the first localization system that consumes microwatts of power at a mobile device and can be localized across multiple rooms in settings such as homes and hospitals. To this end, we introduce a multiband backscatter prototype that operates across 900 MHz, 2.4 GHz, and 5 GHz and can extract the backscatter phase information from signals that are below the noise floor. We build subcentimeter-sized prototypes that consume 93 μW and could last five to ten years on button cell batteries. We achieved ranges of up to 60 m away from the AP and accuracies of 2, 12, 50, and 145 cm at 1, 5, 30, and 60 m, respectively. To demonstrate the potential of our design, we deploy it in two real-world scenarios: five homes in a metropolitan area and the surgery wing of a hospital in patient pre-op and post-op rooms as well as storage facilities.

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