ISCAS19_tutorial_v2a 2019.pdfOutline •Introduction

文件名称: ISCAS19_tutorial_v2a 2019.pdf

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详细说明：Outline •Introduction •Single-Bit DSModulation Techniques -Frequency synthesis with 2+-point modulation -Spread-spectrum clock generation by DSBBPLL -Phase-tracking receivers with 1b digital output -ToF-based secure transceivers with 1b DSTDC •SummaryOutline Introduction Single-Bit A2 Modulation Techniques Frequency synthesis with 2+-point modulation Spread- spectrum clock generation by△∑ BBPLL Phase-tracking receivers with 1b digital output ToF- pased secure transceivers with1b△∑TDC ● Summary Woogeun rhee ISCAS Tutoria 3of39 △Σ Modulation for Frequency Synthesis Miller T/ 1 ref P/FD charge pump LPF out Riley, JSSC93 1b Quantizer N+1 Oversampled Output N/N+1 .000100010001 二N+1/4 △一∑ K- modulator Oversampling noise shaping AF independent of Fvco, solely determined by FREF and digital bits No 1/f2 noise near carrier like random jittering method Enables direct-digital FM/PM Plays a critical role not only as lo but also as modulator Woogeun rhee ISCAS Tutoria 4of39 △Σ PLL With multi- Phase Quantizer QC 配 4 stage (110MHz) P/FD OP lout ring oscillator DW Q 880970Hz) requena control 3bit△∑ Defense '96 25w2 5略255 Rhee./SCAS'99 Quantization noise reduction with multiphase ring vco First△Σ PLL utilizing a multiphase ring vco Suffers a lot from noise coupling and mismatch in 0. 5um CMOs Woogeun rhee ISCAS Tutoria 5of39 △∑ PLL With multi- Level Quantizer 尺iey,JSSC93 Rhee. JSSC,00 8-level XE+D ∑)D“0.5(2 K +],1 b(t) M=1024 (1-z1) (1-2-1)3+(0.25+(1-2-1)+2(1 1-z-+0.522-0.12 N+2 ·1 b quantizer with ranae a·3 o quantizer with delay-free loop N-1 large input range → Not practical N-2 N-3 →No△ g reduction Single-bit Proposed Woogeun rhee ISCAS Tutoria 6of39 MASH VS. SLDSM 8-evel +) T Multi-stage noise shaping(MASh) Single-loop DSM(SLDSM) Cascaded 1st-order modulators Can control noise shaping function Unconditionally stable and number of quantizer level Easy implementation e.g. high-order with 1b output m output bits(2m output level) Limited input range for stability With m-th order modulator Higher idle tone than Mash in digital implementation Woogeun rhee ISCAS Tutoria 7of39 MASH VS. SLDSM: Frequency Domain Mkr11.8001000GHz Mkr11.8001000GHz 0 dB/diy Ref 0.00 dBm 449.530dBm 10 d B/div Ret 0.0o dBm -59.997dBm 40 个学时 Center span 500.0 kHz Center 1.8000500 GH #Res bw 510 Hz Sweep 7.33 s(1001 pts) #Res Bw 510 Hz VBW 510 Hz sweep 7.33 s(1001 pts) Mkr1 24, 000 MHz Mkr1 24 000 MHz lo gBIdiv Ref o oo dsm 0.011 dBm 10dB/div Ref 0.00 dBm -0.050dBm Center 24. 00 MH span 24.00 MHz Center 24.00 MHz Span 24.00 MHZ #Res Bw 100 kHz VBw 100 kHz Sweep 9.20 ms(1001 pts) #Res BW 100 kHz VBW 100 kHz Sweep 9.20 ms(1001 pts) MASH Shows better fractional spur performance, while sLDSM can achieve lower in-band noise (if not limited by vco noise) Woogeun rhee ISCAS Tutoria 8of39 MASH VS SLDSM: Time domain 10 的时时 0 200 4 2如: 100 6 Less spread pattern useful to mitigate PD nonlinearity Woogeun rhee ISCAS Tutoria 9of39 1b Quantization Linear or nonlinear? o Of course bi-level quantization is not a linear process Woogeun rhee ISCAS Tutoria 10of39

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