Assignee
VTC INC
US75 patents
Top patents by PatentIndex Score
US4959697ASep 25, 1990
Short channel junction field effect transistor
VTC INC116 citations95
US4847519AJul 11, 1989
Integrated, high speed, zero hold current and delay compensated charge pump
VTC INC78 citations94
US4638187AJan 20, 1987
CMOS output buffer providing high drive current with minimum output signal distortion
VTC INC242 citations93
US6020695AFeb 1, 2000
Three-phase generator boost circuit
VTC INC23 citations92
US5856891AJan 5, 1999
MR resistive-biasing scheme providing low noise high common-mode rejection and high supply rejection
VTC INC27 citations92
US5793551AAug 11, 1998
Amplifier having a differential input capacitance cancellation circuit
VTC INC21 citations92
US5781046AJul 14, 1998
Push-and-pull driver circuit for driving an H-bridge coupled to a two-terminal inductive load
VTC INC20 citations92
US5751171AMay 12, 1998
Predriver for fast current switching through a two-terminal inductive load
VTC INC21 citations92
US5488518AJan 30, 1996
Programmable pre-amplifier using a serial shift register to output a plurality of control signals
VTC INC31 citations92
US5345346ASep 6, 1994
Positive feedback low input capacitance differential amplifier
VTC INC27 citations92
US5311146AMay 10, 1994
Current mirror for low supply voltage operation
VTC INC26 citations92
US5291347AMar 1, 1994
Write driver with H-switch synchronizing transistors
VTC INC26 citations92
US5287231AFeb 15, 1994
Write circuit having current mirrors between predriver and write driver circuits for maximum head voltage swing
VTC INC36 citations92
US5282094AJan 25, 1994
Current mirror having a base current compensation circuit with a compensation mirror and a voltage clamp
VTC INC32 citations92
US4964117AOct 16, 1990
Timing synchronizing circuit for baseband data signals
VTC INC24 citations92
US4959618ASep 25, 1990
Differential charge pump for a phase locked loop
VTC INC33 citations92
US4851838AJul 25, 1989
Single chip successive approximation analog-to-digital converter with trimmable and controllable digital-to-analog converter
VTC INC29 citations92
US4827222AMay 2, 1989
Input offset voltage trimming network and method
VTC INC26 citations92
US4782320ANov 1, 1988
Mesh network for laser-trimmed integrated circuit resistors
VTC INC26 citations92
US5914630AJun 22, 1999
MR head preamplifier with output signal amplitude which is independent of head resistance
VTC INC31 citations91
US5880626AMar 9, 1999
Active damping for a disk drive write circuit
VTC INC42 citations91
US5134584AJul 28, 1992
Reconfigurable memory
VTC INC59 citations91
US4689875ASep 1, 1987
Integrated circuit packaging process
VTC INC26 citations89
US5900779AMay 4, 1999
Differential transimpedance amplifier
VTC INC32 citations88
US5757215AMay 26, 1998
Common-gate pre-driver for disc drive write circuit
VTC INC28 citations88
US4779047AOct 18, 1988
Burn-in apparatus for integrated circuits mounted on a carrier tape
VTC INC29 citations87
US4713611ADec 15, 1987
Burn-in apparatus for integrated circuits mounted on a carrier tape
VTC INC33 citations87
US5612828AMar 18, 1997
Write driver with improvements for risetime
VTC INC43 citations85
US4885485ADec 5, 1989
CMOS Output buffer providing mask programmable output drive current
VTC INC25 citations85
US5635863AJun 3, 1997
Programmable phase comparator
VTC INC18 citations84
US5157559AOct 20, 1992
Adjustable bandwidth differentiating amplifier for a magnetic disk drive
VTC INC29 citations83
US5534818AJul 9, 1996
Preamplifier noise filtering circuit
VTC INC19 citations82
US5986832ANov 16, 1999
Write driver with Schottky diodes to improve switching rate and reliability
VTC INC16 citations81
US5942934AAug 24, 1999
On-chip regulator providing good high frequency rejection and noise filtering from the supply
VTC INC14 citations74
US5834952ANov 10, 1998
Open-loop current mode biasing scheme for MR head
VTC INC12 citations74
US5721484AFeb 24, 1998
Power supply filter with active element assist
VTC INC12 citations74
US5373402ADec 13, 1994
System and method for writing servo information and data to a plurality of magnetic discs
VTC INC12 citations74
US5349253ASep 20, 1994
Logic translator interfacing between five-volt TTL/CMOS and three-volt CML
VTC INC10 citations74
US6111716AAug 29, 2000
Referenced magnetoresistives sensor band pass preamplifier
VTC INC12 citations73
US6107888AAug 22, 2000
Method to equalize input currents to differential-to-single-ended amplifier configuration
VTC INC7 citations73
US5990710ANov 23, 1999
High performance write driver for magnetic inductive recording head
VTC INC10 citations73
US5920729AJul 6, 1999
Apparatus for providing pair of complementary outputs with first and subcircuits to convert non-complementary and complementary inputs to first and second pair of complementary output
VTC INC8 citations73
US5872477AFeb 16, 1999
Multiplexer with CMOS break-before-make circuit
VTC INC8 citations73
US5831784ANov 3, 1998
Pseudo differential voltage sense MR preamplifier with improved bandwidth
VTC INC16 citations73
US5812019ASep 22, 1998
Open-loop MR biasing circuit with high power supply and common mode rejection
VTC INC8 citations73
US5757566AMay 26, 1998
Direct AC-coupled amplifier with improved common mode rejection for MR heads
VTC INC13 citations73
US5591300AJan 7, 1997
Single crystal silicon dry-etch endpoint based on dopant-dependent and thermally-assisted etch rates
VTC INC11 citations73
US5532631AJul 2, 1996
Active pull-down write driver for three-terminal inductive load
VTC INC13 citations73
US5257146AOct 26, 1993
Magnetic head swing clamp and cross-talk eliminator for read/write preamplifier
VTC INC18 citations73
US4843342AJun 27, 1989
Differential amplifier with input bias current cancellation
VTC INC19 citations73
Showing the top 50 of 75 patents by PatentIndex Score.