Suppression of VCO pulling effects using even-harmonic quiet transmitting circuits

Yue Wu, Tianyu Jia, B. Xia, Xinlong Ma, Li Kang, Xiaodong Yang
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引用次数: 2

Abstract

VCO TX pulling could seriously degrade transmitter performance. Unlike previous works that focus on alleviating the problem on the victim side(i.e. VCO or LO generator), we explored methods on suppressing the pulling tone generation at the transmitter side both magnetically and electrically. Magnetic differential structures and harmonic notch are employed for TX inductor/transformer and active circuits to reduce the pulling. Measurement results showed > 25dB reduction of pulling tone at +7dBm output power with <;10.5% DEVM_pk for 8-DPSK bluetooth modulation.
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用均匀谐波安静传输电路抑制压控振荡器的拉效应
VCO TX拉拔会严重降低发射机性能。不像以前的作品,重点是减轻受害者方面的问题(即。VCO或LO发生器),我们探索了在磁和电两方面抑制发射机侧拉音产生的方法。TX电感/变压器和有源电路采用磁差动结构和谐波陷波来减小牵引力。测量结果表明,在8-DPSK蓝牙调制下,在+7dBm输出功率下,当DEVM_pk < 10.5%时,拉音降低> 25dB。
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Theoretical analyses and modeling for nanoelectronics A 66 dB SNDR pipelined split-ADC using class-AB residue amplifier with analog gain correction Suppression of VCO pulling effects using even-harmonic quiet transmitting circuits A 6-bit 10-GS/s 63-mW 4x TI time-domain interpolating flash ADC in 65-nm CMOS A 0.01 mm2 fully-differential 2-stage amplifier with reference-free CMFB using an architecture-switching-scheme for bandwidth variation
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