SG11201903115PA - Protection circuit - Google Patents

Abstract

INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 17 May 2018 (17.05.2018) WIPO I PCT olimion °nolo III 01111101 Dii DID Immo oimIE (10) International Publication Number WO 2018/089124 Al (51) International Patent Classification: H02H 9/04 (2006.01) GO1R 31/3183 (2006.01) G01R 31/319 (2006.01) (21) International Application Number: PCT/US2017/053868 (22) International Filing Date: 28 September 2017 (28.09.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 15/346,230 08 November 2016 (08.11.2016) US (71) Applicant: TERADYNE, INC. [US/US]; 600 Riverpark Drive, North Reading, Massachusetts 01864 (US). (72) Inventors: KIRKISH, Brian; 609 Sandpiper Ct., Al- gonquin, Illinois 60102 (US). NOWAKOWSKI, Don- ald Joseph; c/o Teradyne, Inc., 600 Riverpark Drive, North Reading, Massachusetts 01864 (US). CRESS, Mark Christopher; 6125 S. Teresa Drive, Chandler, Arizona 85249 (US). (74) Agent: PYSHER, Paul A. et al.; Choate, Hall & Ste- wart LLP, Two International Place, Boston, Massachusetts 02110 (US). (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, JO, 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, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, (54) Title: PROTECTION CIRCUIT 10 POSITIVE LIMITING CIRCUIT 13 20 CURRENT SINK 19 GENERATOR 25 26 15 27 18 ATE, INCLUDING PIN DUT 41 CHANNEL 4 ELECTRONICS 31 38 CURRENT 30 SOURCE GENERATOR 32 14 NEGATIVE LIMITING CIRCUIT FIG. 1 cc cc (57) : An example system includes a channel over which signals are transmitted between test equipment and a device under O test (DUT); and limiting circuitry to limit a voltage on the channel. The limiting circuitry includes a PN-junction device connected to pass current in response to the voltage on the channel exceeding a limit. C [Continued on next page] WO 2018/089124 Al MIDEDIMOMOIDIONDEIDIONIMEIHOHOEHEMOVOIS TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(11)) Published: — with international search report (Art. 21(3))