SG11201810578UA - Delta sigma modulator for and method of generating a digital output voltage - Google Patents

Abstract

AmplifierReference capacitor Sensor element Feedback capacitor 206 —208 10 W O 20 17 / 209690 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 07 December 2017 (07.12.2017) WIP0 I o DID lII D Homionoilimo liflo oimIE (10) International Publication Number WO 2017/209690 Al PCT (51) International Patent Classification: H03M 3/00 (2006.01) H03111 1/36 (2006.01) (21) International Application Number: PCT/SG2017/050269 (22) International Filing Date: 24 May 2017 (24.05.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 10201604413S 01 June 2016 (01.06.2016) SG (71) Applicants: AGENCY FOR SCIENCE, TECHNOL- OGY AND RESEARCH [SG/SG]; 1 Fusionopolis Way, #20-10 Connexis North Tower, Singapore 138632 (SG). NANYANG TECHNOLOGICAL UNIVERSITY [SG/SG]; 50 Nanyang Avenue, Singapore 639798 (SG). (72) Inventors: NARASIMMAN, Neelakantan; c/o Indus- try Development, Institute of Microelectronics, 2 Fusio- nopolis Way, #08-02 Innovis Tower, Singapore 138634 (SG). NAG, Dipankar; c/o Industry Development, Insti- tute of Microelectronics, 2 Fusionopolis Way, #08-02 limo- vis Tower, Singapore 138634 (SG). CHAI, Kevin Tshun Chuan; c/o Industry Development, Institute of Microelec- tronics, 2 Fusionopolis Way, #08-02 Innovis Tower, Sin- gapore 138634 (SG). KIM, Tae Hyoung; c/o Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (SG). (74) Agent: VIERING, JENTSCHURA & PARTNER LLP; P.O. Box 1088, Rochor Post Office, Rochor Road, Singa- pore 911833 (SG). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, (54) Title: DELTA SIGMA MODULATOR FOR AND METHOD OF GENERATING A DIGITAL OUTPUT VOLTAGE (57) : Various embodiments may provide a delta sigma modulator for FIG.2 generating a digital output voltage. The delta sigma modulator may include a capacitance-to-voltage converter for converting a sensed continuous-in-time ap- plied capacitance signal to a delta analog output voltage signal. The modulator may also include an integrator circuit arrangement configured to generate an ana- log output voltage signal based on the delta analog output voltage signal. The modulator may additionally include a quantizer circuit arrangement configured to generate the digital output signal based on the analog output voltage signal. The modulator may further include a voltage digital-to-analog converter configured to generate the analog charging voltage based on the digital output signal, there- by generating the delta analog output voltage signal based on the digital output signal. Switch capacitor arrangement Switching mechanis 14 Quantizer circuit arrangement Voltage digital-to-analog converter [Continued on next page] 200 202 Capacitance-to- voltage converter 212 Integrator circuit arrangement — 216 218 220 WO 2017/209690 Al MIDEDIMOMMIDIRMEM001010110110110MMOVOIMIE MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3))