A very high-sensitivity CMOS power detector for high data rate biotelemetry applications

Whitehall, Sean E.; Saavedra, Carlos E.

doi:10.1109/newcas.2014.6934004

Cited by 3 publications

(4 citation statements)

References 7 publications

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“…The signal is first amplified passively by the resonance of inductor L r and parasitic capacitances at the gate of M2. The passive gain, similar to that shown in [19], is given by

\frac{V_{g}}{V_{i} n} = \frac{(1 / j ω C_{eq})}{j ω L_{normalr} + R_{normalp} + (1 / j ω C_{eq})}

where L r is the series inductance to the gate of M2 and C eq is the equivalent capacitance at node V g . Inductor L r is tuned for resonance with C eq , cancelling the reactive components in the denominator to give

\frac{V_{g}}{V_{in}} = \frac{(1 / j ω C_{eq})}{R_{p}} = - \frac{normalj ω L_{r}}{R_{p}} = - j Q_{normalL}

where

Q_{L}

is the quality factor of inductor L r .…”

Section: Circuit Designmentioning

confidence: 84%

“…The signal is first amplified passively by the resonance of inductor L r and parasitic capacitances at the gate of M2. The passive gain, similar to that shown in [19], is given by…”

Section: Rf Front-end Amplifiermentioning

confidence: 91%

“…Implementing the resistance as a transistor results in the lower capacitive loading compared to available technology resistors, similar to the biasing of the front RF amplifier. Envelope detection is implemented at transistor M2 by applying the input to the gate of M2 and taking the rectified output at the drain, as in [19, 21, 22]. The envelope detector is biased with 10 μA of current while the IF amplifiers consume 5 μA each.…”

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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“…The signal is first amplified passively by the resonance of inductor L r and parasitic capacitances at the gate of M2. The passive gain, similar to that shown in [19], is given by

\frac{V_{g}}{V_{i} n} = \frac{(1 / j ω C_{eq})}{j ω L_{normalr} + R_{normalp} + (1 / j ω C_{eq})}

\frac{V_{g}}{V_{in}} = \frac{(1 / j ω C_{eq})}{R_{p}} = - \frac{normalj ω L_{r}}{R_{p}} = - j Q_{normalL}

where

Q_{L}

is the quality factor of inductor L r .…”

Section: Circuit Designmentioning

confidence: 84%

“…The signal is first amplified passively by the resonance of inductor L r and parasitic capacitances at the gate of M2. The passive gain, similar to that shown in [19], is given by…”

Section: Rf Front-end Amplifiermentioning

confidence: 91%

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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“…The signal is passively amplified using a series LC circuit similar to the one analyzed in . The analysis of the front end is greatly simplified by assuming that C bias and R bias are large enough not to be included in the simplified schematic from Figure .…”

Section: Circuit Designmentioning

confidence: 99%

1.5 µW wake‐up‐receiver for biotelemetry applications

Whitehall

Saavedra

2017

Micro & Optical Tech Letters

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16] Gielis JA. A generic geometric transformation that unifies a wide range of natural and abstratic shapes. Am J Bot. 2003;90 (3):333-338.[17] Wentworth SM. AbstractThis article presents a microwave wake-up receiver for biotelemetry applications. The circuit is designed using 130 nm CMOS technology and it consists of a passive amplification front end filter, envelope detector and baseband frequency amplifier with variable feedback filtering. The receiver is designed to operate at 7.6 GHz and measured results show that it has a sensitivity of 240 dBm while drawing just 3 lA from a 0.5 V supply. The presented work has the smallest known area and exhibits a competitive tradeoff between DC power, sensitivity, and bit rate. K E Y W O R D S biotelemetry, CMOS, CMOS RF design, low power RFIC design, wakeup receiver

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A 3V 890μA 13.56MHz OOK receiver with sensitivity improvement by base-band amplifier for short-range wireless biotelemetry application

Tamtrakarn

2016

2016 IEEE 11th Conference on Industrial Electronics and Applications (ICIEA)

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A very high-sensitivity CMOS power detector for high data rate biotelemetry applications

Cited by 3 publications

References 7 publications

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

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

1.5 µW wake‐up‐receiver for biotelemetry applications

A 3V 890μA 13.56MHz OOK receiver with sensitivity improvement by base-band amplifier for short-range wireless biotelemetry application

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