Voltage controlled ring oscillator with wide tuning range and fast voltage swing

Retdian, Nicodimus; Takagi, Shigetaka; Fujii, Nobuo

doi:10.1109/apasic.2002.1031567

Cited by 57 publications

(27 citation statements)

References 1 publication

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“…The maximum clock is up to 40 MHz with the variation of 5%. Since the frequency of the ring-type oscillator is easily affected by the variation of the power supply, the voltage regulated ring oscillator [8] is preferred to use in this design.…”

Section: Voltage Controlled Ring Oscillatormentioning

confidence: 99%

Low power multi-channel capacitive touch sensing unit using capacitor to time conversion method

Park

Kim

Lee

et al. 2012

2012 IEEE International Symposium on Circuits and Systems

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This paper presents a multi-channel capacitive touch sensing unit for SoC applications. This unit includes a simple common processing unit and switch array to detect the touch sensing input by capacitive-time(C-T) conversion method. This touch sensor ASIC is designed based on the Capacitive-Time(C-T) conversion method to have advantages of small current and chip area, and the minimum resolution of the unit is 41 fF per count with the built-in sensing oscillator, LDO regulator and I2C for no additional external components. This unit is implemented in 0.18 um CMOS process with dual supply voltage of 1.8 V and 3.3 V. The total power consumption of the unit is 60 uA and the area is 0.26 mm 2 .

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Section: Voltage Controlled Ring Oscillatormentioning

confidence: 99%

Low power multi-channel capacitive touch sensing unit using capacitor to time conversion method

Park

Kim

Lee

et al. 2012

2012 IEEE International Symposium on Circuits and Systems

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“…The three most common voltage-controlled oscillator (VCO) topologies that have been mainly exploited, include relaxation VCOs, adjustable delay ring oscillators as well as delay-interpolating ring oscillators [3]. Multiple decade (typically 4-5 decades) frequency control has been demonstrated with both relaxation [4,5] as well as ring oscillators [6,7]. Although the reported maximum frequencies for these oscillators extend to hundreds of MHz or even low GHz, these architectures generally suffer from high power consumption and high phase noise.…”

Section: Introductionmentioning

confidence: 99%

A translinear SiGe BiCMOS current-controlled oscillator with 80 Hz–800 MHz tuning range

Loizos

Sotiriadis

Cauwenberghs

2008

Analog Integr Circ Sig Process

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A 3-phase current controlled sinusoidal oscillator, tunable over a wide range of frequencies is presented. The oscillator comprises a ring of 3 cascaded differential G m -C low-pass filter stages, implemented in a fully translinear, NPN-only circuit. Closed-form analytical expressions are derived to quantify both frequency and amplitude tuning, as a function of two current biases. Experimental results from a 0.5 lm SiGe BiCMOS chip demonstrate 7 decades of tuning range, from 80 Hz to 800 MHz, as well as low harmonic distortion. Power consumption scales with oscillation frequency, measuring 2 lW/MHz The circuit serves a range of applications including agile communications, analog built-in self-test, stochastic adaptive control, spectroscopy, and bioinstrumentation.

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“…To extend the tuning range and improve the linearity of VCO, linear controllable CMOS resistors is used as mirror tail current sources of differential amplifiers [1], self-regulating supply noise [2] and shunt-shunt feedback delay cell [3].In this paper, another approach to regulate the VCO oscillation frequency is discussed.…”

Section: Introductionmentioning

confidence: 99%

A dual-path three-stage VCO with wide tuning range

Yang

Jiang

2007

2007 7th International Conference on ASIC

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In this paper, a full integrated high-speed ring VCO is designed. The VCO consists of three stages, each of which is composed of a fast path and a slow path while the outputs of both paths are summed. Since the 0.25um CMOS technology and 3.3v voltage supply, the VCO has a wide operating frequency ranging from 800MHz to 2.1GHz with a high gain of 1.08GHz/V. PLL and frequency synthesizer will be the potential applications.

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Voltage controlled ring oscillator with wide tuning range and fast voltage swing

Cited by 57 publications

References 1 publication

Low power multi-channel capacitive touch sensing unit using capacitor to time conversion method

Low power multi-channel capacitive touch sensing unit using capacitor to time conversion method

A translinear SiGe BiCMOS current-controlled oscillator with 80 Hz–800 MHz tuning range

A dual-path three-stage VCO with wide tuning range

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