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Creators/Authors contains: "Lin, Chung-Ching"

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  1. Free, publicly-accessible full text available June 16, 2025
  2. Pavan Hanumolu, Kenichi Okada (Ed.)
  3. In the baseband time delay (TD) elements used for delay compensation in discrete-time beamformers, phase interpolator (PI) plays a crucial role as the resolution of the PI defines the delay resolution of the TD. In this paper, we present a process and temperature invariant high-resolution and highly linear low-power PI. The proposed PI uses current integration which generates an adaptable constant slope-and-swing ramp signal to achieve low power. By switched-capacitor bias generation, the PI linearity is enhanced with 0.2 LSB DNL and 0.3 LSB INL, respectively. The 7-bit PI is realized in 65nm CMOS technology can generate the full range delay with a resolution of 8psec with the input of 1GHz. The PI consumes a power of 345μW and occupies an active area of 0.021mm2. Keywords—Ramp-rate tracking, constant slope-and-swing, phase interpolator, ramp-based, baseband time delay 
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