VTC INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G11B INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER 22116
 
  
 
H03K PULSE TECHNIQUE 10121
 
  
 
G05F SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES 694
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 3359
 
  
 
H03B GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS 360
 
  
 
H03F AMPLIFIERS 380
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 2157
 
  
 
B23D PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR 128
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 1446
 
  
 
G06G ANALOGUE COMPUTERS 152

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6297921 Write driver circuit having programmable overshoot and undershootApr 15, 99Oct 02, 01[G11B]
6226137 Voltage bias, current sense preamplifier using no AC-coupling capacitors for a dual strip magnetoresistive readerApr 02, 99May 01, 01[G11B]
6133768 Breakdown voltage compensation circuit for write driver transistorsApr 15, 99Oct 17, 00[H03K, H03B]
6020695 Three-phase generator boost circuitJul 23, 99Feb 01, 00[H02P]
6005733 Preamplifier bias circuit for use in an AC coupled magnetoresistive read head amplifierJun 12, 97Dec 21, 99[G11B]
5994951 Automatic-tuning circuit for integrated continuous-time MOSFET-C filtersJan 20, 98Nov 30, 99[H03K]
5990710 High performance write driver for magnetic inductive recording headJun 02, 97Nov 23, 99[H03B]
5986832 Write driver with Schottky diodes to improve switching rate and reliabilityJun 11, 97Nov 16, 99[G11B]
5982574 Automatic tracking frequency servo demodulation technique for DVCR applicationsOct 17, 97Nov 09, 99[G11B]
5942934 On-chip regulator providing good high frequency rejection and noise filtering from the supplyJul 09, 97Aug 24, 99[G05F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5641263 Bundle unscramblerExpiredJan 19, 96Jun 24, 97[B65G]
5612828 Write driver with improvements for risetimeExpiredSep 11, 95Mar 18, 97[G11B]
5591300 Single crystal silicon dry-etch endpoint based on dopant-dependent and thermally-assisted etch ratesExpiredJun 07, 95Jan 07, 97[H01L, G01N, H05H]
5398144 Bias generator for a low voltage differential read amplifierExpiredFeb 25, 93Mar 14, 95[G11B]
5227737 Method and apparatus for adjusting the pole positions of a differentiating amplifierExpiredDec 05, 90Jul 13, 93[H03G]
5206605 High breakdown voltage/low input capacitance amplifierExpiredMar 13, 92Apr 27, 93[H03F]
5087884 Open head detection circuit and methodExpiredJun 28, 90Feb 11, 92[G01R]
4964117 Timing synchronizing circuit for baseband data signalsExpiredOct 04, 88Oct 16, 90[H04L]
4959618 Differential charge pump for a phase locked loopExpiredFeb 16, 89Sep 25, 90[H03K, H03D]
4959697 Short channel junction field effect transistorExpiredFeb 20, 90Sep 25, 90[H01L]
4923824 Simplified method of fabricating lightly doped drain insulated gate field effect transistorsExpiredApr 27, 88May 08, 90[H01L]
4893036 Differential signal delay circuitExpiredAug 15, 88Jan 09, 90[H03K]
4870476 Integrated circuit packaging process and structureExpiredOct 24, 88Sep 26, 89[H01L]
4868425 Skew compensated RS422 bufferExpiredDec 07, 87Sep 19, 89[H03K]
4851838 Single chip successive approximation analog-to-digital converter with trimmable and controllable digital-to-analog converterExpiredDec 18, 87Jul 25, 89[H03M]
4847519 Integrated, high speed, zero hold current and delay compensated charge pumpExpiredOct 14, 87Jul 11, 89[H03K, H03F]
4843342 Differential amplifier with input bias current cancellationExpiredDec 09, 87Jun 27, 89[H03F]
4827222 Input offset voltage trimming network and methodExpiredDec 11, 87May 02, 89[H04F]
4818726 Process for curing epoxy encapsulant on integrated circuit diceExpiredMar 30, 88Apr 04, 89[H01L]
4782320 Mesh network for laser-trimmed integrated circuit resistorsExpiredNov 03, 86Nov 01, 88[H01C]

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