Journal ArticleDOI
A 0.4–6-GHz Frequency Synthesizer Using Dual-Mode VCO for Software-Defined Radio
TLDR
In this paper, a dualmode voltage-controlled oscillator (DMVCO) and a DMVCO-based wideband frequency synthesizer for software-defined radio applications are presented.Abstract:
This paper presents a dual-mode voltage-controlled oscillator (DMVCO) and a DMVCO-based wideband frequency synthesizer for software-defined radio applications. The DMVCO allows the synthesizer to leverage single-sideband (SSB) mixing, a power efficient approach, for high-frequency local oscillator (LO) signal generation, without the need of poly-phase filter or quadrature voltage-controlled oscillator (QVCO). When compared to the QVCO approach, the DMVCO solution allows the synthesizer to provide continuous LO signals without frequency gaps. The synthesizer is implemented in a 0.13-μm CMOS technology, occupying an active area of 2.2 mm2 and consuming 34-77 mW of power. It provides in-phase and quadrature-phase LO signals over the frequency bands of 0.4-3- and 5-6 GHz and differential LO signals from 0.4 to 6 GHz, supporting major wireless standards including DVB-T, GSM, WCDMA, TD-SCDMA, WLAN802.11 a/b/g, and Bluetooth. The measured phase noises are -135 and -124 dBc/Hz at 3-MHz offset under 1.8- and 5.15-GHz carriers, respectively. The measured spurious tones are less than - 42 dBc at the SSB mixer output.read more
Citations
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Proceedings Article
Injection-Locked CMOS Frequency Doublers for μ-Wave and mm-Wave Applications
TL;DR: In this article, the same topology where a push-push pair injects a double frequency tone locking an autonomous differential oscillator is adopted, allowing the design of voltage-controlled oscillators running at a frequency lower than required with advantage in terms of signal spectral purity and frequency tuning range.
Journal ArticleDOI
24-GHz Injection-Locked Frequency Tripler With Third-Harmonic Quadrature Phase Generator
Dongseok Shin,Kwang-Jin Koh +1 more
TL;DR: The presented third-harmonically quadrature phasing technique increases an injection-locking range effectively with the minimizing injection signal loss compared with prior conventional injection techniques employing phase shifters at the fundamental frequency.
Journal ArticleDOI
A 0.03- to 3.6-GHz Frequency Synthesizer With Self-Biased VCO and Quadrature-Input Quadrature-Output Frequency Divider
TL;DR: A 30 MHz–3.6 GHz wideband frequency synthesizer with a self-biased oscillator and quadratures-input quadrature-output (QIQO) dividers for software-defined radio applications is presented in this brief.
Journal ArticleDOI
A 0.045- to 2.5-GHz Frequency Synthesizer With TDC-Based AFC and Phase Switching Multi-Modulus Divider
TL;DR: In order to suppress the quantization noise caused by the sigma-delta modulator (SDM) in the MMD, the loop division step is reduced from 2 to 0.5 by adopting the PS technique.
Proceedings ArticleDOI
Very Wide Range Frequency Synthesizer Architecture for Avionic SDR Applications
TL;DR: A very wide range frequency synthesizer architecture appropriate to avionic software defined radio (SDR) applications and using the advanced design system (ADS) simulation tool and SpectreRF simulator is presented.
References
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Journal ArticleDOI
Design issues in CMOS differential LC oscillators
Ali Hajimiri,Thomas H. Lee +1 more
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Proceedings ArticleDOI
A 900 MHz CMOS LC-oscillator with quadrature outputs
TL;DR: In this article, the authors present a 900 MHz oscillator circuit implemented in 1 /spl mu/m CMOS that affords modestly low-phase noise, has variable frequency with large output swing, and provides quadrature-phase outputs from two identical coupled oscillators, connected in such a way that they exert a mutual squelch when their relative phase is not in Quadrature.
Journal ArticleDOI
The Path to the Software-Defined Radio Receiver
TL;DR: The receiver's flexible analog baseband samples the channel of interest at zero IF, and is followed by clock-programmable downsampling with embedded filtering, giving a tunable selectivity that exceeds that of an RF prefilter, and a conversion rate that is low enough for A/D conversion at only milliwatts.