An Equivalent-Time Sampling Millimeter-Wave Ultra-Wideband Radar Pulse Digitizer in CMOS.
In: IEEE Transactions on Circuits & Systems. Part I: Regular Papers, Jg. 69 (2022-10-01), Heft 10, S. 3901-3914
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Zugriff:
In designing a mm-wave ultra-wideband pulse-Doppler radar IC, one of the main challenges encountered is to reduce the high power consumption of the circuitries in the IC. A direct-RF receiver can be used in the radar’s design to reduce the radar’s power consumption. However, a digitizer that can directly digitize mm-wave ultra-wideband radar pulses is needed to implement such a receiver. This work presents the design of such a digitizer, which comprises several multi-pass sub-ADCs that operate together. Each multi-pass sub-ADC works fundamentally like a flash ADC but comprises one comparator only. A test chip containing a 6-bit prototype of the digitizer is fabricated in a 40 nm CMOS technology. The prototype consumes 19.7 mW when operated at 4 GSa/s and can operate with input signal frequencies of up to 64 GHz while achieving a −1.7/−6 dBFS SNDR of 21.1/22.8 dB at 60 GHz (the corresponding FoM is 532/434 fJ/c-s). The digitizer has a relatively high effective parallel-equivalent input impedance at 60 GHz, which, in a radar IC implementation, allows it to be driven with a relatively low power-consuming 60 GHz RF buffer. These are achieved without the digitizer being fabricated in a much more advanced technology node. [ABSTRACT FROM AUTHOR]
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Titel: |
An Equivalent-Time Sampling Millimeter-Wave Ultra-Wideband Radar Pulse Digitizer in CMOS.
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Autor/in / Beteiligte Person: | Limi Jaya, Gibran ; Boon, Chirn Chye ; Chen, Shoushun ; Siek, Liter |
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Zeitschrift: | IEEE Transactions on Circuits & Systems. Part I: Regular Papers, Jg. 69 (2022-10-01), Heft 10, S. 3901-3914 |
Veröffentlichung: | 2022 |
Medientyp: | serialPeriodical |
ISSN: | 1549-8328 (print) |
DOI: | 10.1109/TCSI.2022.3190141 |
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