The need for low-noise, highly-linear, programmable chirp generators makes digital phase-locked loops (DPLLs) an attractive solution for radar sensors. This paper presents a general analysis and comparison of the two main techniques enabling wideband frequency modulation (FM) in PLLs, namely the two-point injection and the pre-emphasis. It is shown that while the two topologies are equivalent in term of mismatch error suppression, the required input range for the time-to-digital converter (TDC) is substantially lower in the two-point injection scheme, thus relaxing the TDC power consumption and linearity.

Analysis of millimeter-wave digital frequency modulators for ubiquitous sensors and radars

CHERNIAK, DMYTRO;LEVANTINO, SALVATORE;SAMORI, CARLO;
2017

Abstract

The need for low-noise, highly-linear, programmable chirp generators makes digital phase-locked loops (DPLLs) an attractive solution for radar sensors. This paper presents a general analysis and comparison of the two main techniques enabling wideband frequency modulation (FM) in PLLs, namely the two-point injection and the pre-emphasis. It is shown that while the two topologies are equivalent in term of mismatch error suppression, the required input range for the time-to-digital converter (TDC) is substantially lower in the two-point injection scheme, thus relaxing the TDC power consumption and linearity.
2017 IEEE International Symposium on Circuits and Systems (ISCAS)
978-1-4673-6853-7
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/1032803
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