CMOS pulse generator based on spectral efficiently gated oscillator for UWB impulse radio

Kim, Wonjong; Kwon, Ickjin

doi:10.1587/elex.10.20130204

Cited by 6 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Drive amplifiers, which consume most of the current in the transmitter, consume significant amounts of current owing to static currents even when there is no input signal [16,[26][27][28][29][30]. Therefore, it is necessary to reduce the static current of the drive amplifier for the design of low-power sensor interfaces with duty-cycling operation.…”

Section: Drive Amplifiermentioning

confidence: 99%

“…The ultrawideband (UWB) transmitter based on a low-power pulse generator is suitable for RF energy-harvesting sensor applications because it enables low-power wireless transmission. However, the drive amplifier that transmits the output to the antenna needs high power consumption, and the linear drive amplifier consumes static current during the standby operation, which is the main cause of low efficiency [24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Energy-Efficient UWB Transmitter with Wireless Injection Locking for RF Energy-Harvesting Sensors

Kim

Heo

Kwon

2021

Sensors

Self Cite

View full text Add to dashboard Cite

An ultralow-power ultrawideband (UWB) transmitter with an energy-efficient injection-locked radio frequency (RF) clock harvester that generates a carrier from an RF signal is proposed for RF energy-harvesting Internet-of-Things (IoT) sensor applications. The energy-efficient RF clock harvester based on the injection-locked ring oscillator (ILRO) is proposed to achieve optimal locking range and minimum input sensitivity to obtain an injection-locked 450 MHz clock in ultralow-power operation. A current-starved inverter-based delay stage is adopted that allows delay adjustment by bias voltage to minimize dynamic current consumption while maintaining a constant delay regardless of changes in process, supply voltage, and temperature (PVT). To minimize static current consumption, a UWB transmitter based on a digital-based UWB pulse generator and a pulse-driven switching drive amplifier is proposed. The proposed injection-locked RF clock harvester achieves the best RF input sensitivity of −34 dBm at a power consumption of 2.03 μW, enabling energy-efficient clock harvesting from low RF input power. In ultralow-power operation, a 23.8% locking range is achieved at the RF injection power of –15 dBm to cope with frequency changes due to PVT variations. The proposed UWB transmitter with RF clock harvester achieves the lowest energy consumption per pulse with an average power consumption of 97.03 μW and an energy consumption of 19.41 pJ/pulse, enabling operation with the energy available in RF energy-harvesting applications.

show abstract

Section: Drive Amplifiermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Energy-Efficient UWB Transmitter with Wireless Injection Locking for RF Energy-Harvesting Sensors

Kim

Heo

Kwon

2021

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…An additional drive amplifier for driving 50‐Ω output loads generally consumes a large amount of power because of the static current [4, 6–14, 20, 21]. Although the static current can be reduced by switching the drive amplifier on/off, doing so causes unwanted signal distortions at the rising and falling edges of the switch signal [8, 11].…”

Section: Proposed Gaussian Pulse Generatormentioning

confidence: 99%

“…Therefore, a digital pulse generator requires an additional band-pass filter for pulse shaping to meet the FCC spectrum mask [5][6][7][8][9][10] and a large chip area for LC filters. However, Gaussian pulse-shaping circuits without a band-pass filter have been reported [4,[11][12][13][14][15][16][17][18][19][20][21]. To support various applications, the centre frequency and bandwidth need to be controlled.…”

Section: Introductionmentioning

confidence: 99%

CMOS impulse radio ultra‐wideband Gaussian pulse generator with variable channel and bandwidth

Choi

Kwon

2016

IET Circuits, Devices & Systems

Self Cite

View full text Add to dashboard Cite

A Gaussian pulse generator for an ultra-wideband impulse radio transmitter is presented. The proposed generator is based on digital intensive circuits, and the centre frequency and bandwidth of a pulse are controlled by a digitally tunable delay circuit and pulse-width control circuit. The Gaussian pulse is obtained by a weighted summing amplifier that is controlled by a digital switching signal without an additional LC filter. The amplifier uses a Gaussian pulse shaper that has tunable weighting factors with bandwidth control. The energy consumption of the pulse generator is 37.4 pJ/pulse, and sidelobe rejection of 20 dB is achieved without a filter.

show abstract

“…The ring oscillator is a crucial component that has been widely used in analog and digital applications [1,2,3,4]. It is an important circuit block in DC-DC converters due to its compact design, wide tuning range, and low power consumption [1].…”

Section: Introductionmentioning

confidence: 99%

A temperature-compensated CMOS ring oscillator for DC-DC converters

Xia

Guo

et al. 2013

IEICE Electron. Express

View full text Add to dashboard Cite

A novel current controlled CMOS ring oscillator is presented in this paper. Specially circuit structure and transistor parameters design is used to obtain good temperature coefficient. The designed ring oscillator circuit has been used in a CMOS step-up switching regulator controller which has been implemented using a 0.5 μm double poly double metal CMOS technology. The test result shows that the frequency is about 1.2 MHz and the error (Δf/f) is about 3.5% in the temperature range À20-100℃. The circuit is quite suitable for DC-DC converters.

show abstract

CMOS pulse generator based on spectral efficiently gated oscillator for UWB impulse radio

Cited by 6 publications

References 5 publications

An Energy-Efficient UWB Transmitter with Wireless Injection Locking for RF Energy-Harvesting Sensors

An Energy-Efficient UWB Transmitter with Wireless Injection Locking for RF Energy-Harvesting Sensors

CMOS impulse radio ultra‐wideband Gaussian pulse generator with variable channel and bandwidth

A temperature-compensated CMOS ring oscillator for DC-DC converters

Contact Info

Product

Resources

About