支持快速OOK/BFSK/ BPSK调制的高q FBAR谐振振荡器可重构调制器设计

IF 5.2 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems I: Regular Papers Pub Date : 2025-04-18 DOI:10.1109/TCSI.2025.3559727

Dong Liang;Hui Zhang;Yetong Wang;Linhao Ma;Shiyue Ma;Zhijun Zhou;Fanyi Meng;Kaixue Ma;Keping Wang

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引用次数: 0

摘要

提出了一种基于振荡器的可重构调制器，以支持多模快速调制。采用交叉耦合振荡器与快速开关薄膜体声谐振器（FBAR）组成的直接调制结构，提高了快速OOK/BFSK调制下的频率稳定性。为了避免额外的反相电路，调制器差分支路采用换极性开关结构实现高效节能的BPSK调制，该结构也被复用作为OOK/BFSK调制的缓冲级，避免负载效应。此外，还提出了一种自适应快速交换技术，以提高OOK/BFSK调制的数据速率和能量效率。该调制器采用180nm CMOS工艺制造。两个fbar的自由振荡频率分别为962 MHz和990 MHz，测得的相位噪声分别为-137.3 dBc/Hz@1MHz和-137.1 dBc/Hz@1MHz。对于OOK/BFSK/BPSK调制，所提出的调制器具有280/ 225 /67.6 pJ/bit的能量效率和5.63/4.20/ 5.55%的有效值EVM，数据速率为10/10/50 Mbps。

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Design of Oscillator-Based Reconfigurable Modulator With High-Q FBAR Resonators Supporting Fast OOK/BFSK/ BPSK Modulation

An oscillator-based reconfigurable modulator is proposed to support multi-mode and fast modulation. A direct-modulation structure composed of the cross-coupled oscillator with the fast-switched film bulk acoustic resonator (FBAR) is used to enhance the frequency stability under fast OOK/BFSK modulation. To avoid extra phase-reversal circuitry, a polarity-swapped switching structure is employed in the differential branches of the modulator to achieve energy-efficient BPSK modulation, and this structure is also reused as a buffer stage for OOK/BFSK modulation to avoid the loading effect. In addition, an adaptive fast-switching technique is also proposed to improve OOK/BFSK modulation data rate and energy efficiency. The modulator is fabricated in a 180 nm CMOS technology. The free-running oscillation frequencies with two FBARs are 962 MHz and 990 MHz, and the measured phase noises are -137.3 dBc/Hz@1MHz and -137.1 dBc/Hz@1MHz, respectively. For OOK/BFSK/BPSK modulation, the proposed modulator demonstrated 280/325/67.6 pJ/bit energy efficiency and 5.63/4.20/5.55 % rms EVM with 10/10/50 Mbps data rates.

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来源期刊

IEEE Transactions on Circuits and Systems I: Regular Papers 工程技术-工程：电子与电气

CiteScore

9.80

自引率

11.80%

发文量

441

审稿时长

2 months

期刊介绍： TCAS I publishes regular papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: - Circuits: Analog, Digital and Mixed Signal Circuits and Systems - Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic - Circuits and Systems, Power Electronics and Systems - Software for Analog-and-Logic Circuits and Systems - Control aspects of Circuits and Systems.