Proceedings ArticleDOI
A multiple modulator fractional divider
B. Miller,B. Conley +1 more
- pp 559-568
Reads0
Chats0
TLDR
In this article, a CMOS integrated fractional-N divider is presented, which allows the spectrum of error energy to be shaped so that fractional synthesis error energy is pushed away from the carrier.Abstract:
Based on oversampling A/D conversion technology which allows the spectrum of error energy to be shaped so that fractional synthesis error energy is pushed away from the carrier, a CMOS integrated fractional-N divider is presented. A complete fractional-N phase locked loop (PLL) which was constructed utilizing only the CMOS divider, a dual modulus prescaler, a simple loop filter, and a voltage controlled oscillator is discussed. The resulting PLL is shown to exhibit no fractional spurs. >read more
Citations
More filters
Proceedings ArticleDOI
Integrated circuits for data transmission over twisted-pair channels
David A. Johns,D. Essig +1 more
TL;DR: In this paper, typical architectures and future challenges in designing integrated circuits for data transmission over twisted-pair wire channels are discussed, and two main applications are addressed-HDSL and fast-Ethernet.
Journal ArticleDOI
Design and implementation of a low-voltage fast-switching mixed-signal-controlled frequency synthesizer
TL;DR: A new frequency synthesizer based on combining the analog phase-locked loop (PLL) and the all digital PLL (ADP LL) is presented, which achieves high frequency resolution, broad frequency range, high switching speed, and low supply voltage.
Journal ArticleDOI
A Class of Quantizers With DC-Free Quantization Noise and Optimal Immunity to Nonlinearity-Induced Spurious Tones
TL;DR: The previously published successive requantizer results are extended to enable the design of successive requanizers whose quantization noise running sum sequences attain such immunity to nonlinearity-induced spurious tones up to arbitrarily high orders of distortion.
Journal ArticleDOI
A New Mechanism Producing Discrete Spurious Components in Fractional- $N$ Frequency Synthesizers
TL;DR: A new phenomenon-based on cross-coupling and sampling of the nonharmonically related signals present in such synthesizers is proposed, capable of producing a family of spurious components of identical form to fractional spurs.
Dissertation
Automatic calibration of modulated fractional-N frequency synthesizers
TL;DR: A technique for in service automatic calibration of a modulated phase locked loop (PLL) frequency synthesizer has been developed and provides greater accuracy in the modulation than what is possible via offline methods of calibration.
References
More filters
Journal ArticleDOI
A Use of Double Integration in Sigma Delta Modulation
TL;DR: A modulator that employs double integration and two-level quantization is easy to implement and is tolerant of parameter variation.
Journal ArticleDOI
A 16-bit oversampling A-to-D conversion technology using triple-integration noise shaping
TL;DR: A highly stable triple-integration noise-shaping technology which permits greater accuracy for monolithic audio A/D converters is discussed and a 16-bit 24-kHz bandwidth A-D converter LSI with digital filters was successfully fabricated in 2-/spl mu/m CMOS technology.
Journal ArticleDOI
Oversampled Sigma-Delta Modulation
TL;DR: This paper rigorously derive several basic properties of a simple discrete-time single integrator loop sigma-delta modulator with an accumulate-and-dump demodulator and shows that when the input is constant, the state sequence of the integrator in the encoder loop can be modeled exactly as a linear system in an appropriate space.
Book
Frequency synthesis by phase lock
TL;DR: The Elementary Phase-Locked Synthesizer, Modulation, Sidebands and Noise Spectrums, and its Applications: Large-Signal Performance, Natural Acquisition.
Book ChapterDOI
The Structure of Quantization Noise from Sigma-Delta Modulation
James C. Candy,O. Benjamin +1 more
TL;DR: Simple algebraic expressions for this modulation noise and its spectrum in terms of the input amplitude are derived and can be useful for designing oversampled analog to digital converters that use sigma-delta modulation for the primary conversion.