Ultra-low-power, ultra-low-voltage 2.12 GHz colpitts oscillator using inductive gate degeneration

Rottava, Rodrigo Eduardo; Santos, Carlyle Camara; Sousa, Francinalva Cordeiro de; Lima, Robson Nunes de

doi:10.1109/newcas.2013.6573614

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…2(a), the negative conductance should be greater than the load conductance in its one-port network when the oscillator starts up. The operating frequency is determined by inductors and capacitors generated from its one-port network [29]. The negative conductance is always generated by using a positive feedback amplifier, which is used to maintain the sustained oscillation.…”

Section: Base Inductor Feedbackmentioning

confidence: 99%

“…Therefore, it would make the frequency of the Colpitts VCO shift from its design goal or even make it not oscillate as the PVT varies when the value of L g is used at the resonance point or near it. In order to avoid this condition, the value of L g is determined as that is discussed in [29]. As a result, L g used in this design is at the left side of the curve as shown in Fig.…”

Section: Base Inductor Feedbackmentioning

confidence: 99%

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A low-power high-output-efficiency bipolar Colpitts VCO using base inductive feedback and Q-factor enhancement for analog signal acquisition

Huang

Jiang

Yang

et al. 2020

IEICE Electron. Express

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A low-power Colpitts VCO with high output efficiency that uses base inductive feedback and Q-factor enhancement techniques is proposed in this paper. The base inductive feedback technique employs an inductor at the base of the bipolar transistor to generate a feedback enhancement effect and reduce the start-up current. The Q-factor enhancement technique adopts a capacitor voltage divider at the output of the Colpitts VCO to improve the DC-to-RF efficiency. The mechanisms are theoretically analyzed, and then a 433 MHz Colpitts VCO is designed to verify the scheme. Its DC consumption is as low as 270 µW while the operating frequency is 433 MHz. Finally, the Colpitts VCO is applied in a wireless neural signal recording system and works well. Thus, the presented VCO is suitable for analog signal acquisition system in the extremely power-constrained wireless scenarios. key words: Colpitts VCO, Inductive feedback, Q-factor enhancement, DCto-RF efficiency, Low power Classification: Devices, circuits and hardware for IoT and biomedical applications

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Section: Base Inductor Feedbackmentioning

confidence: 99%

Section: Base Inductor Feedbackmentioning

confidence: 99%

A low-power high-output-efficiency bipolar Colpitts VCO using base inductive feedback and Q-factor enhancement for analog signal acquisition

Huang

Jiang

Yang

et al. 2020

IEICE Electron. Express

View full text Add to dashboard Cite

show abstract

“…As a consequence, a low start‐up voltage oscillator needs to be implemented. The LC resonant circuit is one of the most suitable for this task [ Rottava et al ., ; Hajimiri and Lee , ] since it provides low‐voltage operation with just one MOS transistor between ground and power supply. We propose using a LC resonant circuit with degeneration LC impedances (see Figure ) that requires a lower start‐up voltage with respect to the simple LC oscillator.…”

Section: Architecture Of the Power Management Circuitmentioning

confidence: 99%

UHF front‐end feeding RFID‐based body sensor networks by exploiting the reader signal

et al. 2016

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This paper presents an integrated, high‐sensitivity UHF radio frequency identification (RFID) power management circuit for body sensor network applications. The circuit consists of a two‐stage RF‐DC Dickson's rectifier followed by an integrated five‐stage DC‐DC Pelliconi's charge pump driven by an ultralow start‐up voltage LC oscillator. The DC‐DC charge pump interposed between the RF‐DC rectifier and the output load provides the RF to load isolation avoiding losses due to the diodes reverse saturation current. The RF‐DC rectifier has been realized on FR4 substrate, while the charge pump and the oscillator have been realized in 180 nm complementary metal oxide semiconductor (CMOS) technology. Outdoor measurements demonstrate the ability of the power management circuit to provide 400 mV output voltage at 14 m distance from the UHF reader, in correspondence of −25 dBm input signal power. As demonstrated in the literature, such output voltage level is suitable to supply body sensor network nodes.

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An 80 mV Startup Voltage Fully Electrical DC–DC Converter for Flexible Thermoelectric Generators

et al. 2016

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Ultra-low-power, ultra-low-voltage 2.12 GHz colpitts oscillator using inductive gate degeneration

Cited by 5 publications

References 8 publications

A low-power high-output-efficiency bipolar Colpitts VCO using base inductive feedback and Q-factor enhancement for analog signal acquisition

A low-power high-output-efficiency bipolar Colpitts VCO using base inductive feedback and Q-factor enhancement for analog signal acquisition

UHF front‐end feeding RFID‐based body sensor networks by exploiting the reader signal

An 80 mV Startup Voltage Fully Electrical DC–DC Converter for Flexible Thermoelectric Generators

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