Topic
Voltage-controlled oscillator
About: Voltage-controlled oscillator is a research topic. Over the lifetime, 23896 publications have been published within this topic receiving 231875 citations. The topic is also known as: VCO.
Papers published on a yearly basis
Papers
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TL;DR: A data-aided frequency and symbol synchronization scheme for M-QAM OFDM signals is suggested and the acquisition and tracking performance of the synchronization system are evaluated using simulation for a 4-PSK signal constellation.
Abstract: A data-aided frequency and symbol synchronization scheme for M-QAM OFDM signals is suggested. At first, the phase discriminator (PD) and frequency discriminator (FD) for, respectively, the symbol and frequency synchronization loop are described. Second, the transfer function and design parameters of the loop filters are provided. The acquisition and tracking performance of the synchronization system are evaluated using simulation for a 4-PSK signal constellation. The cases of additive white Gaussian noise (AWGN) and frequency and time selective multipath Rayleigh channels are separately tested.
76 citations
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TL;DR: In this article, the authors present the first quadrature RF receiver front-end where, in a single stage, low-noise amplifier (LNA), mixer and voltage-controlled oscillator (VCO) share the same bias current.
Abstract: This paper presents the first quadrature RF receiver front-end where, in a single stage, low-noise amplifier (LNA), mixer and voltage-controlled oscillator (VCO) share the same bias current. The new structure exploits the intrinsic mixing functionality of a classical LC tank oscillator providing a compact and low-power solution compatible with low-voltage technologies. A 0.13-mum CMOS prototype tailored to the GPS application is presented. The experimental results exhibit a noise figure of 4.8 dB, a gain of 36 dB, an IIP3 of -19 dBm with a total power consumption of only 5.4 mW from a voltage supply of 1.2 V
76 citations
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TL;DR: In this paper, a 192 GHz cross-coupled push-push voltage controlled oscillator (VCO) is fabricated using the UMC 013 /spl mu/m CMOS logic process.
Abstract: A 192 GHz cross-coupled push-push voltage controlled oscillator (VCO) is fabricated using the UMC 013 /spl mu/m CMOS logic process The VCO can be tuned from 1914 to 1927 GHz The VCO provides output power of /spl sim/-20 dBm and phase noise of /spl sim/-100 dBc/Hz at 10 MHz offset, while consuming 11 mA from a 15 V supply
76 citations
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01 Jul 1998TL;DR: A phase interpolated frequency synthesizer with on-chip tuning includes a voltage controlled oscillator, a fractional-N divider, phase compensation and on chip tuning circuits, a phase detector, and a loop filter.
Abstract: A phase interpolated frequency synthesizer with on chip tuning includes a voltage controlled oscillator, a fractional-N divider, phase compensation and on chip tuning circuits, a phase detector, and a loop filter. The phase compensation and on chip tuning circuits compensate for the phase lag from the fractional-N divider. The phase compensation circuit can include a series of voltage controlled delay elements with the tuning circuit providing a control voltage.
76 citations
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03 Apr 2012TL;DR: For the first time, a tunable high-power oscillator at sub-mm-Wave frequencies in low-power (LP) bulk CMOS is introduced in this work.
Abstract: Sub-mm-Wave and terahertz frequencies have many applications such as medical imaging, spectroscopy and communication systems. CMOS signal generation at this frequency range is a major challenge due to the limited cut-off frequency of transistors and their low breakdown voltage. A recent work has demonstrated generation of high power at a fixed frequency in the sub-mm-Wave range using a harmonic oscillator [1]. However, for most applications a tunable signal source is necessary. In previous works, frequency multipliers are used as an alternative for tunable power generation above 150GHz [2]. In this work, for the first time we introduce a tunable high-power oscillator at sub-mm-Wave frequencies in low-power (LP) bulk CMOS.
75 citations