Assignee
VTC INC
US·75 granted patents·1,743 citations·filing 1985–1999
Top patents by PatentIndex Score
75 records- 0195US4847519AIntegrated, high speed, zero hold current and delay compensated charge pumpVTC INC·Filed 1987·Granted Jul 11, 1989·78 cites·15 claims
- 0293US4638187ACMOS output buffer providing high drive current with minimum output signal distortionVTC INC·Filed 1985·Granted Jan 20, 1987·242 cites·32 claims
- 0392US4959697AShort channel junction field effect transistorVTC INC·Filed 1990·Granted Sep 25, 1990·116 cites·2 claims
- 0488US5287231AWrite circuit having current mirrors between predriver and write driver circuits for maximum head voltage swingVTC INC·Filed 1992·Granted Feb 15, 1994·36 cites·19 claims
- 0588US5134584AReconfigurable memoryVTC INC·Filed 1988·Granted Jul 28, 1992·59 cites·17 claims
- 0687US5282094ACurrent mirror having a base current compensation circuit with a compensation mirror and a voltage clampVTC INC·Filed 1993·Granted Jan 25, 1994·32 cites·14 claims
- 0783US5880626AActive damping for a disk drive write circuitVTC INC·Filed 1996·Granted Mar 9, 1999·42 cites·10 claims
- 0882US5291347AWrite driver with H-switch synchronizing transistorsVTC INC·Filed 1993·Granted Mar 1, 1994·26 cites·8 claims
- 0981US5488518AProgrammable pre-amplifier using a serial shift register to output a plurality of control signalsVTC INC·Filed 1994·Granted Jan 30, 1996·31 cites·3 claims
- 1080US4959618ADifferential charge pump for a phase locked loopVTC INC·Filed 1989·Granted Sep 25, 1990·33 cites·10 claims
- 1180US4827222AInput offset voltage trimming network and methodVTC INC·Filed 1987·Granted May 2, 1989·26 cites·8 claims
- 1277US5345346APositive feedback low input capacitance differential amplifierVTC INC·Filed 1993·Granted Sep 6, 1994·27 cites·17 claims
- 1377US4851838ASingle chip successive approximation analog-to-digital converter with trimmable and controllable digital-to-analog converterVTC INC·Filed 1987·Granted Jul 25, 1989·29 cites·5 claims
- 1476US5612828AWrite driver with improvements for risetimeVTC INC·Filed 1995·Granted Mar 18, 1997·43 cites·28 claims
- 1576US5311146ACurrent mirror for low supply voltage operationVTC INC·Filed 1993·Granted May 10, 1994·26 cites·25 claims
- 1675US5856891AMR resistive-biasing scheme providing low noise high common-mode rejection and high supply rejectionVTC INC·Filed 1997·Granted Jan 5, 1999·27 cites·32 claims
- 1774US5757215ACommon-gate pre-driver for disc drive write circuitVTC INC·Filed 1997·Granted May 26, 1998·28 cites·20 claims
- 1872US4782320AMesh network for laser-trimmed integrated circuit resistorsVTC INC·Filed 1986·Granted Nov 1, 1988·26 cites·6 claims
- 1971US6020695AThree-phase generator boost circuitVTC INC·Filed 1999·Granted Feb 1, 2000·23 cites·25 claims
- 2071US4843342ADifferential amplifier with input bias current cancellationVTC INC·Filed 1987·Granted Jun 27, 1989·19 cites·16 claims
- 2171US4713611ABurn-in apparatus for integrated circuits mounted on a carrier tapeVTC INC·Filed 1986·Granted Dec 15, 1987·33 cites·11 claims
- 2270US5914630AMR head preamplifier with output signal amplitude which is independent of head resistanceVTC INC·Filed 1997·Granted Jun 22, 1999·31 cites·14 claims
- 2370US5157559AAdjustable bandwidth differentiating amplifier for a magnetic disk driveVTC INC·Filed 1991·Granted Oct 20, 1992·29 cites·14 claims
- 2469US5900779ADifferential transimpedance amplifierVTC INC·Filed 1997·Granted May 4, 1999·32 cites·13 claims
- 2569US5793551AAmplifier having a differential input capacitance cancellation circuitVTC INC·Filed 1995·Granted Aug 11, 1998·21 cites·13 claims
- 2669US5751171APredriver for fast current switching through a two-terminal inductive loadVTC INC·Filed 1996·Granted May 12, 1998·21 cites·21 claims
- 2769US4779047ABurn-in apparatus for integrated circuits mounted on a carrier tapeVTC INC·Filed 1987·Granted Oct 18, 1988·29 cites·18 claims
- 2867US5781046APush-and-pull driver circuit for driving an H-bridge coupled to a two-terminal inductive loadVTC INC·Filed 1995·Granted Jul 14, 1998·20 cites·5 claims
- 2966US5986832AWrite driver with Schottky diodes to improve switching rate and reliabilityVTC INC·Filed 1997·Granted Nov 16, 1999·16 cites·20 claims
- 3066US4893036ADifferential signal delay circuitVTC INC·Filed 1988·Granted Jan 9, 1990·16 cites·11 claims
- 3166US4774492ASlotted integrated circuit resistorVTC INC·Filed 1986·Granted Sep 27, 1988·14 cites·22 claims
- 3265US5257146AMagnetic head swing clamp and cross-talk eliminator for read/write preamplifierVTC INC·Filed 1992·Granted Oct 26, 1993·18 cites·21 claims
- 3364US5534818APreamplifier noise filtering circuitVTC INC·Filed 1995·Granted Jul 9, 1996·19 cites·8 claims
- 3464US4728902AStabilized cascode amplifierVTC INC·Filed 1986·Granted Mar 1, 1988·14 cites·12 claims
- 3562US5894237AWrite driver with buffer circuits between pull-up resistors and upper drive transistorsVTC INC·Filed 1997·Granted Apr 13, 1999·16 cites·12 claims
- 3662US5258877AData separator having a restart circuitVTC INC·Filed 1992·Granted Nov 2, 1993·16 cites·20 claims
- 3762US4885485ACMOS Output buffer providing mask programmable output drive currentVTC INC·Filed 1988·Granted Dec 5, 1989·25 cites·26 claims
- 3860US5373402ASystem and method for writing servo information and data to a plurality of magnetic discsVTC INC·Filed 1993·Granted Dec 13, 1994·12 cites·16 claims
- 3960US5260842AData separator having an accurate delay circuitVTC INC·Filed 1992·Granted Nov 9, 1993·15 cites·22 claims
- 4060US4964117ATiming synchronizing circuit for baseband data signalsVTC INC·Filed 1988·Granted Oct 16, 1990·24 cites·12 claims
- 4158US5532631AActive pull-down write driver for three-terminal inductive loadVTC INC·Filed 1994·Granted Jul 2, 1996·13 cites·15 claims
- 4258US4771228AOutput stage current limit circuitVTC INC·Filed 1987·Granted Sep 13, 1988·14 cites·10 claims
- 4357US5278700ADifferentiating amplifier responsive to track locations and variations of element values from desired valuesVTC INC·Filed 1993·Granted Jan 11, 1994·15 cites·6 claims
- 4456US6111716AReferenced magnetoresistives sensor band pass preamplifierVTC INC·Filed 1998·Granted Aug 29, 2000·12 cites·14 claims
- 4556US6005733APreamplifier bias circuit for use in an AC coupled magnetoresistive read head amplifierVTC INC·Filed 1997·Granted Dec 21, 1999·13 cites·39 claims
- 4656US4689875AIntegrated circuit packaging processVTC INC·Filed 1986·Granted Sep 1, 1987·26 cites·14 claims
- 4755US5942934AOn-chip regulator providing good high frequency rejection and noise filtering from the supplyVTC INC·Filed 1997·Granted Aug 24, 1999·14 cites·20 claims
- 4855US5831784APseudo differential voltage sense MR preamplifier with improved bandwidthVTC INC·Filed 1996·Granted Nov 3, 1998·16 cites·16 claims
- 4955US5635863AProgrammable phase comparatorVTC INC·Filed 1995·Granted Jun 3, 1997·18 cites·20 claims
- 5054US5994951AAutomatic-tuning circuit for integrated continuous-time MOSFET-C filtersVTC INC·Filed 1998·Granted Nov 30, 1999·14 cites·10 claims
Showing the top 50 of 75 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when VTC INC files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →