Inventor · disambiguated record
Johannes O. Voorman
Also filed as: VOORMAN JOHANNES · VOORMAN JOHANNES O · VOORMAN JOHANNES OTTO
62 granted patents·1 pending application·1,210 citations·filing 1975–2003
99Inventor score
Top patents by PatentIndex Score
63 records- 0197US4252995ARadio broadcasting system with transmitter identificationPHILIPS CORP·Filed 1978·Granted Feb 24, 1981·155 cites·7 claims
- 0296US4914408AAsymmetric polyphase filterPHILIPS CORP·Filed 1989·Granted Apr 3, 1990·97 cites·3 claims
- 0394US4485357ACircuit for amplitude and phase modulation of carrier signal by two respective input signalsPHILIPS CORP·Filed 1982·Granted Nov 27, 1984·104 cites·15 claims
- 0493US4723110ATransconductance amplifierPHILIPS CORP·Filed 1987·Granted Feb 2, 1988·46 cites·20 claims
- 0588US6515812B1Servo format for hard disks, preferably hard disksKONINKL PHILIPS ELECTRONICS NV·Filed 2000·Granted Feb 4, 2003·26 cites·18 claims
- 0685US5589777ACircuit and method for testing a disk drive head assembly without probingHEWLETT PACKARD CO·Filed 1995·Granted Dec 31, 1996·62 cites·20 claims
- 0785US4926135ABalanced integrator-filter arrangementPHILIPS CORP·Filed 1989·Granted May 15, 1990·33 cites·21 claims
- 0884US5619386AArrangement for reading information from a track on a record carrier comprising a fast settling read amplifier for magneto-resistive headsPHILIPS CORP·Filed 1994·Granted Apr 8, 1997·54 cites·28 claims
- 0980US5124705AAnalog-to-digital signal converter comprising a multiple sigma-delta modulatorPHILIPS CORP·Filed 1991·Granted Jun 23, 1992·43 cites·14 claims
- 1078US6788749B2Erasure based instantaneous loop control in a data receiverKONINKL PHILIPS ELECTRONICS NV·Filed 2000·Granted Sep 7, 2004·29 cites·2 claims
- 1171US4780690AFilter arrangement having a transconductance circuitPHILIPS CORP·Filed 1987·Granted Oct 25, 1988·18 cites·8 claims
- 1270US5668676AMagnetic head write amplifier including current mirrors and switchable current sourcesPHILIPS CORP·Filed 1995·Granted Sep 16, 1997·25 cites·14 claims
- 1369US5559646ABalanced arrangement for reading information from a track on a record carrier which arrangement includes amplifier circuits containing cut-off capacitors which are cross-coupled to reduce noisePHILIPS CORP·Filed 1994·Granted Sep 24, 1996·19 cites·31 claims
- 1467US5105163ABalanced filter circuit having a single amplifierPHILIPS CORP·Filed 1990·Granted Apr 14, 1992·20 cites·7 claims
- 1566US6940670B2Method of reading magnetic information which is immunized against thermal asperitiesKONINKL PHILIPS ELECTRONICS NV·Filed 2000·Granted Sep 6, 2005·6 cites·9 claims
- 1666US4210882ADelay network comprising a chain of all-pass sectionsPHILIPS CORP·Filed 1977·Granted Jul 1, 1980·12 cites·9 claims
- 1765US5525930AFrequency compensation circuit for stabilizing a differential amplifier with cross-coupled transistorsPHILIPS CORP·Filed 1994·Granted Jun 11, 1996·20 cites·5 claims
- 1864US4016435ACurrent stabilizing arrangementPHILIPS CORP·Filed 1975·Granted Apr 5, 1977·14 cites·10 claims
- 1963US5469475ATransmitter comprising an eletronic arrangement for generating a modulated carrier signalPHILIPS CORP·Filed 1991·Granted Nov 21, 1995·41 cites·16 claims
- 2063US5103228ASigma-delta modulatorPHILIPS CORP·Filed 1991·Granted Apr 7, 1992·23 cites·4 claims
- 2162US5157343AElectronic arrangement for receiving a modulated carrier signalPHILIPS CORP·Filed 1991·Granted Oct 20, 1992·38 cites·16 claims
- 2261US5790336AArrangement comprising a magnetic write head, and write amplifier with capacitive current compensationPHILIPS CORP·Filed 1997·Granted Aug 4, 1998·21 cites·23 claims
- 2360US4017750ACircuit arrangement for effectively making integrated impedances accuratePHILIPS CORP·Filed 1976·Granted Apr 12, 1977·10 cites·6 claims
- 2459US5943368ATransmission, recording and reproduction of a digital information signalPHILIPS CORP·Filed 1997·Granted Aug 24, 1999·14 cites·20 claims
- 2559US4193033AQuadrature transposition stagePHILIPS CORP·Filed 1978·Granted Mar 11, 1980·11 cites·4 claims
- 2658US7313060B2Optical disk system with non-linearly controlled amplifierKONINKL PHILIPS ELECTRONICS NV·Filed 2003·Granted Dec 25, 2007·3 cites·18 claims
- 2755US6381082B1Arrangement for reading information form a record carrierPHILIPS CORP·Filed 1999·Granted Apr 30, 2002·11 cites·5 claims
- 2854US4798982AActive symmetrical balance hybrid circuitPHILIPS CORP·Filed 1987·Granted Jan 17, 1989·18 cites·6 claims
- 2954US4629973ACurrent stabilizing circuit operable at low power supply voltagesPHILIPS CORP·Filed 1984·Granted Dec 16, 1986·11 cites·3 claims
- 3054US4431976AAdaptive filterPHILIPS CORP·Filed 1981·Granted Feb 14, 1984·10 cites·7 claims
- 3152US6118833AFast acquisition method for obtaining data from a transmission channel and a data receiver for carrying out this methodPHILIPS CORP·Filed 1997·Granted Sep 12, 2000·27 cites·16 claims
- 3252US5952880AVariable-gain amplifier with pseudo-logarithmic gain control for generating two control currentsPHILIPS CORP·Filed 1997·Granted Sep 14, 1999·16 cites·9 claims
- 3352US5063356ABalanced filter circuit having a controllable balanced current multiplierPHILIPS CORP·Filed 1990·Granted Nov 5, 1991·11 cites·13 claims
- 3451US4090138AFSK Transmitter having frequency band-limitationPHILIPS CORP·Filed 1976·Granted May 16, 1978·11 cites·6 claims
- 3549US4322811AClamping circuit for an adaptive filterPHILIPS CORP·Filed 1980·Granted Mar 30, 1982·8 cites·2 claims
- 3648US4786880AFilter arrangementPHILIPS CORP·Filed 1987·Granted Nov 22, 1988·8 cites·9 claims
- 3748US4747068AAdaptive filterPHILIPS CORP·Filed 1986·Granted May 24, 1988·10 cites·1 claims
- 3847US6091558ADevice for write compensation in magnetic media recordingPHILIPS CORP·Filed 1997·Granted Jul 18, 2000·8 cites·16 claims
- 3946US5103117ALatch circuitPHILIPS CORP·Filed 1991·Granted Apr 7, 1992·8 cites·3 claims
- 4044US6324028B1Recording apparatus provided with a write driver circuitPHILIPS CORP·Filed 1999·Granted Nov 27, 2001·7 cites·20 claims
- 4144US4647790AData signal correction circuitPHILIPS CORP·Filed 1985·Granted Mar 3, 1987·7 cites·6 claims
- 4243US6288859B1Device for write compensation in magnetic-media recordingPHILIPS CORP·Filed 1999·Granted Sep 11, 2001·6 cites·5 claims
- 4342US6304396B1Arrangement for reading information from a magnetic record carrierPHILIPS CORP·Filed 1999·Granted Oct 16, 2001·11 cites·12 claims
- 4442US6134065AMethod and device utilizing erasure information as a reliability indicator in an information mediumPHILIPS CORP·Filed 1996·Granted Oct 17, 2000·7 cites·20 claims
- 4541US7433292B2Optical disk system with delay-difference detector without delay linesKONINKL PHILIPS ELECTRONICS NV·Filed 2003·Granted Oct 7, 2008·0 cites·8 claims
- 4641US6188250B1Peak detection apparatusPHILIPS CORP·Filed 1999·Granted Feb 13, 2001·12 cites·16 claims
- 4740US6137647AAutomatic gain control circuit for use in detecting servo pulses for controlling the position of a read head in a hard disk drivePHILIPS CORP·Filed 1998·Granted Oct 24, 2000·7 cites·9 claims
- 4840US4264975AReceiver for frequency modulated signals having two quadrature channelsPHILIPS CORP·Filed 1979·Granted Apr 28, 1981·4 cites·3 claims
- 4939US5859566AElectronic circuit comprising complementary transconductors for filters and oscillatorsPHILIPS CORP·Filed 1997·Granted Jan 12, 1999·7 cites·13 claims
- 5039US2006163607A1Upside-down photo detectorKONINKL PHILIPS ELECTRONICS NV·Filed 2003·Application pending·0 cites
Showing the top 50 of 63 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →