An 8 bits, RF UHF-Band DAC based on interleaved bandpass delta sigma modulator assisted by background digital calibration

Aghasharif, Farshad; Malekpour, Mohammad‐Reza; Bigdeli, Reza; Torkzadeh, Pooya

doi:10.1016/j.vlsi.2021.11.001

Cited by 1 publication

(1 citation statement)

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“…DSM technology is known for its ability to provide high resolution and dynamic range. For example, a multimode 8 to 4 bits delta sigma digital-to-analog converter (DAC) is proposed in reference [4], and a FIR filter is used in the design to reduce error and SNDR deterioration. A team designed a high over-sampling rate (OSR) pulse transmitter for FPGA applications [5] and explored the implementation of DSM parallel topology and technology.…”

Section: Introductionmentioning

confidence: 99%

An all-digital RF transmitter architecture based on jitter-enhanced PWM for flexible frequency applications

Long,

Chen,

et al. 2024

Preprint

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We propose a novel flexible jitter-enhanced pulse width modulation(PWM) hardware architecture, which aims to improve the modulation resolution while reducing the requirement of PWM frequency.The architecture creatively distributes the jitter effect uniformly to every radio frequency(RF) cycle corresponding to the same baseband cycle by controllable jitter, which provides a new modulation resolution growth method in the time domain. The architecture provides flexibility to adapt to different basebands and radio frequencies. By using jitter, the modulation resolution of this paper can improve 5.32 bit at most, and the EVM performance can reach -40.63db. The architecture proposed in this paper can use lower PWM frequency of 200MHz, which greatly reduces the frequency requirement of switching power amplifier in RF transmitting system. The jitter method proposed in this paper significantly improves the low modulation resolution of the traditional PWM all-digital RF transmitter and greatly changes the efficiency of all digital transmitters in the wireless communication system.

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Section: Introductionmentioning

confidence: 99%