10Gbps Optical Receiver and VCSEL Driver in 0.13um CMOS ...

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sensitivity of the whole receiver. Fig 2.5(a) shows a noiseless TIA with an equivalent noise current source, i n,TIA , at the input. This current source is chosen such that, together with the noiseless TIA, it produces the same noise at the output as the real noisy TIA. The Input-Referred Noise Current Spectrum, 2 I TIA (f) n, , has the typical frequency dependence shown in Fig 2.5(b). Since this spectrum is not white it is not sufficient to specify a value at a single frequency. For a meaningful comparison of the TIA noise performance it is necessary to look at the (a) (b) Figure 2.5 (a) Input-referred noise current, and (b) typical power spectrum whole spectrum up to about (2 x BW 3-dB ). Furthermore, the sensitivity of the TIA depends on a combination of the noise spectrum and the frequency response |Z T (f)|. The Input-Referred RMS Noise Current, or Total Input-Referred 11
Noise Current, i rms n,TIA (f), is determined by integrating the output-referred noise spectrum up at least 2 x BW 3-dB and dividing it by the passband transimpedance value. Written in the squared form, we have: i 2 n , TIA 1 2 2 = ZT ( f ) ⋅ In, TIA( f ) df 2 ∫ (2.4) Z T where |Z T (f)| is the frequency response of the transimpedance. The total input-referred noise current directly determines the sensitivity of the TIA: pp rms i S 2Q ⋅ In, TIA = (2.5) where Q is the quality factor for desired bit error rates (BERs). The Averaged Input-Referred Noise Current Density is defined as the input- rms referred rms noise current, , divided by the square-root of the 3- dB bandwidth. Again, it is important that the averaging is carried out over the output-referred noise spectrum rather than the input-referred noise spectrum, . I 2 n, TIA i n , TIA 2.1.2.2 TIA Topologies Generally there are two types of TIA topologies, open loop TIAs 12
Page 1 and 2: 10-Gb/s Optical Receiver and VCSEL
Page 4 and 5: Contents Figure Index______________
Page 6 and 7: Figure 2.12 (a) Common-Gate and (b)
Page 8 and 9: Table Index Table 1. Measurement Re
Page 10 and 11: low-noise characteristics. However,
Page 12 and 13: Chapter Ⅰ Introduction 1.1 Optica
Page 14 and 15: An optical communication system gen
Page 16 and 17: Chapter Ⅱ 10-Gb/s Optical Receive
Page 18 and 19: performance of receiver. The photod
Page 20 and 21: Photodiode C PD I in TIA + V out -
Page 24 and 25: and feedback TIAs. The goal when de
Page 26 and 27: performance of this device comes at
Page 28 and 29: + V in - + + LA - - + V out - Figur
Page 30 and 31: 2.2 10-Gb/s Optical Receiver Analog
Page 32 and 33: inversely proportional to BW 3-dB .
Page 34 and 35: common-gate configuration. For exam
Page 36 and 37: 2.14 shows schematic of DC offset c
Page 38 and 39: ω 3− dB GBW Our work Figure 2.16
Page 40 and 41: in Fig 2.20. Optical receiver maint
Page 42 and 43: 3.1 Background 3.1.1 VCSEL CHAPTER
Page 44 and 45: electrical and optical dBs. As indi
Page 46 and 47: 3.2 Design of VCSEL Driver 3.2.1 Pr
Page 48 and 49: 3.3 Simulation Results Figure 3.6 E
Page 50 and 51: (b) Figure 4.1 Microphotographs of
Page 52 and 53: MM410C (optical power monitor and a
Page 54 and 55: transimpedance amplifiers and limit
Page 56 and 57: (d) Figure 4.4 Eye Patterns of the
Page 58 and 59: CHAPTER Ⅴ Conclusion In this diss
Page 60 and 61: Bibliography [1] Wei-Zen Chen and D
Page 62 and 63: [12] Behnam Analui and Ali Hajimiri
Page 64 and 65: 국문요약 CMOS 0.13-μm 공정
Page 66: 다. 본 연구에서 설계된 광

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