1.5 µW wake‐up‐receiver for biotelemetry applications

Whitehall, Sean E.; Saavedra, Carlos E.

doi:10.1002/mop.30850

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…In [23] it is found that the sensitivity signal-to-noise ratio (SNR) of an envelope detection circuit can be expressed as…”

Section: Sensitivitymentioning

confidence: 99%

“…In [23] it is found that the sensitivity signal‐to‐noise ratio (SNR) of an envelope detection circuit can be expressed as

SNR = \frac{i_{s}^{2}}{i_{n}^{2}} = \frac{V_{normals}^{4} C_{env}}{10 k_{normalB} T V_{normalT}^{2}}

where

i_{n}^{2}

and

v_{n}^{2}

are the thermal noise power expressed by current or voltage, respectively, and referred to the receiver input.

V_{s}

is the amplitude of the input signal voltage,

C_{env}

is the enveloped detection capacitor,

k_{B}

is Boltzmann's constant, T is the temperature in Kelvin, and

V_{T}

is the thermal voltage.…”

Section: Circuit Designmentioning

confidence: 99%

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Low‐power low data rate FM‐UWB receiver front end

Whitehall

Saavedra

2018

IET Circuits, Devices & Systems

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This study introduces a frequency modulated ultra-wideband (FM-UWB) receiver optimised for low power and fast start-up. The receiver consists of a front end amplifier converting a frequency modulated signal to an amplitude modulated signal which is applied to an envelope detector. The receiver front end is for 500 MHz channels centred at 3450 and 3950 MHz. The amplifier uses passive gain and four cascaded gain stages to achieve high radio-frequency gain without the need for superregeneration. By simplifying the architecture this way, the front end has a 5 μs wake-up time to enable efficient duty-cycling. The measured front end receives a signal at −68 dBm while consuming 600 μW of power (excluding a test buffer) from a 1 V supply. Fabrication was done using the IBM 130-nm CMOS technology on a 1 mm × 1 mm loose die.

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“…In [23] it is found that the sensitivity signal-to-noise ratio (SNR) of an envelope detection circuit can be expressed as…”

Section: Sensitivitymentioning

confidence: 99%

“…In [23] it is found that the sensitivity signal‐to‐noise ratio (SNR) of an envelope detection circuit can be expressed as

SNR = \frac{i_{s}^{2}}{i_{n}^{2}} = \frac{V_{normals}^{4} C_{env}}{10 k_{normalB} T V_{normalT}^{2}}

where

i_{n}^{2}

and

v_{n}^{2}

are the thermal noise power expressed by current or voltage, respectively, and referred to the receiver input.

V_{s}

is the amplitude of the input signal voltage,

C_{env}

is the enveloped detection capacitor,

k_{B}

is Boltzmann's constant, T is the temperature in Kelvin, and

V_{T}

is the thermal voltage.…”

Section: Circuit Designmentioning

confidence: 99%

Low‐power low data rate FM‐UWB receiver front end

Whitehall

Saavedra

2018

IET Circuits, Devices & Systems

Self Cite

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show abstract

“…The receiver portion for FM‐UWB is based on an RF amplifier or filter that introduces a slope in the frequency response. The amplifier or filter converts the FM wireless signal to an amplitude‐modulated signal from which the sub‐carrier is recovered using an envelope detector such as described and utilised in [16] or [17]. State‐of‐the‐art receivers have power consumptions of 432 and 580 μW with sensitivities of −70 and −80 dBm in [9, 14], respectively.…”

Section: Introductionmentioning

confidence: 99%

Compact 640 μW frequency‐modulated ultra‐wideband transmitter

Whitehall

Saavedra

2018

IET Circuits, Devices & Systems

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This study reports a frequency-modulated ultra-wideband transmitter optimised for low-power consumption. The chip includes a sub-oscillator tunable from 0.1 to 4 MHz, a radio-frequency oscillator tunable from 3.0 to 4.5 GHz, and an output power amplifier with a matching network. Depending on the channel selected, the measured transmitter consumes between 440 and 640 μW of power to produce −14 dBm continuously to a 50 Ω load. Two power supplies are used to reduce the effect of wasted voltage headroom between circuit blocks. Fabrication is done using the International Business Machines Corporation 130 nm complementary metal-oxide-semiconductor technology on a 1 mm × 1 mm loose die, the circuit occupies 0.2 mm 2 .

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1.5 µW wake‐up‐receiver for biotelemetry applications

Cited by 2 publications

References 14 publications

Low‐power low data rate FM‐UWB receiver front end

Low‐power low data rate FM‐UWB receiver front end

Compact 640 μW frequency‐modulated ultra‐wideband transmitter

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