Design and Analysis of a 1.8-GHz Open-Loop Modulator for Phase Modulation and Frequency Synthesis Using TDC-Based Calibration
In: IEEE Transactions on Microwave Theory and Techniques, Jg. 65 (2017-10-01), S. 3975-3988
Online
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Zugriff:
A nonlinearity calibration technique is proposed for an open-loop phase modulator (PM), for wideband phase modulation, and for multiple-output, low-jitter clock generation. The design considerations and key performance aspects of the calibration technique are discussed. The PM integrates a digital phase-locked loop, local oscillator distribution network, and digital calibration. A prototype was implemented in 0.13- $\mu \text{m}$ CMOS 1.8-GHz Gaussian frequency shift keying (GFSK) transmitter integrated circuit. Measurements on the prototype show that out-of-band quantization noise is 56 dB lower than that of the signal when transmitting 20-Mb/s GFSK signal and the rms error is only 3.2%. The power consumption of the PM is 18 mW. The measured spurious tones of the clock generation unit are below −46 dBc.
Titel: |
Design and Analysis of a 1.8-GHz Open-Loop Modulator for Phase Modulation and Frequency Synthesis Using TDC-Based Calibration
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Autor/in / Beteiligte Person: | Nidhi, Nitin ; Pamarti, Sudhakar |
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Zeitschrift: | IEEE Transactions on Microwave Theory and Techniques, Jg. 65 (2017-10-01), S. 3975-3988 |
Veröffentlichung: | Institute of Electrical and Electronics Engineers (IEEE), 2017 |
Medientyp: | unknown |
ISSN: | 1557-9670 (print) ; 0018-9480 (print) |
DOI: | 10.1109/tmtt.2017.2697879 |
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