Low‐power quadrature generators for body area network applications

Masuch, Jens; Delgado‐Restituto, Manuel

doi:10.1002/cta.783

Cited by 5 publications

(5 citation statements)

References 25 publications

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“…Their applications include communication, control, and instrumentation systems [ 30 , 31 , 32 ]. Biquadratic filters and oscillators can be applied to biomedical systems [ 33 , 34 , 35 ]. Therefore, low-voltage supply and low-power consumption are mainly considered for these applications.…”

Section: Introductionmentioning

confidence: 99%

0.3-Volt Rail-to-Rail DDTA and Its Application in a Universal Filter and Quadrature Oscillator

Khateb

Kumngern

Kulej

et al. 2022

Sensors

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This paper presents the extremely low-voltage supply of the CMOS structure of a differential difference transconductance amplifier (DDTA). With a 0.3-volt supply voltage, the circuit offers rail-to-rail operational capability. The circuit is designed for low-frequency biomedical and sensor applications, and it consumes 357.4 nW of power. Based on two DDTAs and two grounded capacitors, a voltage-mode universal filter and quadrature oscillator are presented as applications. The universal filter possesses high-input impedance and electronic tuning ability of the natural frequency in the range of tens up to hundreds of Hz. The total harmonic distortion (THD) for the band-pass filter was 0.5% for 100 mVpp @ 84.47 Hz input voltage. The slight modification of the filter yields a quadrature oscillator. The condition and the frequency of oscillation are orthogonally controllable. The frequency of oscillation can also be controlled electronically. The THD for a 67 Hz oscillation frequency was around 1.2%. The circuit is designed and simulated in a Cadence environment using 130 nm CMOS technology from United Microelectronics Corporation (UMC). The simulation results confirm the performance of the designed circuits.

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Section: Introductionmentioning

confidence: 99%

0.3-Volt Rail-to-Rail DDTA and Its Application in a Universal Filter and Quadrature Oscillator

Khateb

Kumngern

Kulej

et al. 2022

Sensors

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“…As a result, the single-balance MIXER was chosen to minimize power consumption (high priority). In addition, the prior work in [11] proposes a passive front-end zero-IF architecture for low energy Bluetooth applications, which is driven by a quadrature voltage-controlled oscillator (QVCO) [13]. Although the topology achieves high sensitivity and high speed operation, the QVCO presents a tradeoff between phase noise and quadrature accuracy in a fundamental coupling scheme.…”

Section: Measurement Results and Discussionmentioning

confidence: 99%

Fully integrated 2.45‐GHz OOK receiver for wireless sensor networks

Gong

Chang

Tsou

2016

Circuit Theory & Apps

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SUMMARYThis paper introduces an optimized receiver architecture using the current-reuse technique to improve receiver sensitivity while minimizing power consumption. An ISM band wireless receiver with OOK modulation was implemented in the TSMC 0.18-μm CMOS process. The receiver contains an RF front end, an LC-tank based LO VCO, an IF amplifier and an OOK demodulator. In addition, the IF amplifier features a self-mixing elimination mechanism which allows the BER to upgrade more than one order of magnitude. Measurement results show a sensitivity of À63 dBm given a BER of 10 À3 . Using the gain-improving method, the sensitivity is improved by 4 dB (100-kbps data rate). Including the bias circuit, overall power consumption is less than 383 μW under a 1.2-V supply, providing an alternate solution for wireless radio applications.

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“…3) is designed to operate from the same low supply voltage as the VCO (0.65V). Like [5] it uses two Dynamic Single-Transistor-Clocking (DSTC) latches, that operate alternatively, based on a clock at twice the output frequency. The gates are biased through resistors to allow for enough speed while operating with the low supply voltage.…”

Section: Circuit Designmentioning

confidence: 99%

A 65-nm CMOS 250uW quadrature LO generation circuit

Bryant

Sjöland

2012

2012 IEEE/MTT-S International Microwave Symposium Digest

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This paper presents a quadrature LO generation circuit with ultra-low power consumption. Apart from applications such as such as sensor networks and medical implants, we show that it could even be used as part of a secondary WCDMA receiver, since most of the time the signal conditions are significantly relaxed compared to the worst case scenario. Consisting of an oscillator and frequency divider, the circuit, manufactured in 65nm CMOS, consumes less than 250μW from a 0.65V supply while operating in the 2.14GHz band.

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Low‐power quadrature generators for body area network applications

Cited by 5 publications

References 25 publications

0.3-Volt Rail-to-Rail DDTA and Its Application in a Universal Filter and Quadrature Oscillator

0.3-Volt Rail-to-Rail DDTA and Its Application in a Universal Filter and Quadrature Oscillator

Fully integrated 2.45‐GHz OOK receiver for wireless sensor networks

A 65-nm CMOS 250uW quadrature LO generation circuit

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