A 6-GHz All- Digital Fractional- N Frequency Synthesizer Using FIR- Embedded Noise Filtering Technique

作者：Lee I Ting; Lu Hung Yu; Liu Shen Iuan

来源：IEEE Transactions on Circuits and Systems II-Express Briefs, 2012, 59(5): 267-271.

DOI：10.1109/TCSII.2012.2188474

• All-digital
• delta-sigma modulator (DSM)
• digitally controlled oscillator (DCO)
• frequency synthesizer
• quantization noise
• time-to-digital converter (TDC)

A 6-GHz all-digital fractional-N frequency synthesizer using an FIR-embedded noise filtering technique is presented. This noise filtering technique is realized in the digital domain without multiple matched analog components. This fractional-N frequency synthesizer is fabricated in a 90-nm CMOS process, and it occupies 0.18 mm(2). Its power is 28.8 mW with a supply of 1.2 V. The measured out-of-band phase noise at an offset of half the reference frequency is improved by more than 13 dB around 6 GHz considering cancellation variations for different output frequencies.

• 出版日期2012-5
• 单位中国科学院电工研究所