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Search result: 17 of 56 |
(WO/2008/001298) DISC DRIVE AND PHOTO-DETECTOR CIRCUITS
- Biblio. Data
- Description
- Claims
- National Phase
- Notices
- Documents
| Latest bibliographic data on file with the International Bureau
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| IPC: | G11B 7/005 (2006.01), G11B 7/09 (2006.01), G11B 7/13 (2006.01) | |||||||||||
| Applicants: | KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1, NL-5621 BA Eindhoven (NL) (All Except US). BAKX, Johannes Leopoldus [NL/NL]; (NL) (US Only). | |||||||||||
| Inventor: | BAKX, Johannes Leopoldus; (NL). | |||||||||||
| Agent: | KONINKLIJKE PHILIPS ELECTRONICS N.V.; c/o Hema Sridhar, Philips Intellectual Property & Standards, Philips Electronics India Limited, Manyata Tech Park, Nagavara, Bangalore 560 045 (IN). | |||||||||||
| Priority Data: |
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| Title: | DISC DRIVE AND PHOTO-DETECTOR CIRCUITS | |||||||||||
| Abstract: | A method of reducing power dissipation in a variable-gain photo-detector circuit is described. The variable-gain photo-detector circuit has an output to output a main spot signal and at least one side spot signal. The main spot (M) and the side spot (Si or S2) are formed by separating a light beam into a main beam and at least one side beam and focusing the main beam on the main spot (M) and the side beam on at least one side spot (Si or S2) on an optical record carrier. The method processes the main spot signal with a first averaging circuit (1000) having a first cut-off frequency. The side spot signal is processed with a second averaging circuit (2000) having a second cut-off frequency. The second cut-off frequency is lower than the first cut-off frequency. The above technique reduces power dissipation in the variable-gain photo-detector circuit and is useful for all optical devices. | |||||||||||
| Designated States: |
AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. African Regional Intellectual Property Org. (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW) Eurasian Patent Organization (EAPO) (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM) European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, PL, PT, RO, SE, SI, SK, TR) African Intellectual Property Organization (OAPI) (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). | |||||||||||
| Publication Language: | English (EN) |
| Filing Language: | English (EN) |
