Inventor

CONTRERAS JOHN T

US35 patents

⚠️ This page may combine multiple inventors who share the name “CONTRERAS JOHN T”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CONTRERAS JOHN T

WESTERN DIGITAL TECH INC

Shielded patterned ground structure filter for EMI reduction

Disk drive biasing two write assist elements using three terminal control circuitry

Data storage device employing multi-mode sensing circuitry for multiple head sensor elements

Semiconductor device with die-skipping wire bonds

Data storage device configured with manufacture PCB for concurrent write/read operation

DC and synchronized energy assisted perpendicular magnetic recording (EPMR) driver circuit for hard disk drive (HDD)

Differential sense of embedded contact sensor (ECS) and near-field temperature sensor (NTS) utilizing chopping amplifier

System controlled RF signal source architecture with transducer near pole-tip for microwave assisted magnetic recording

Alternating-bias signal resistance detection for resistive temperature detectors in disk drives

Data storage device employing amplifier feedback for impedance matching

Data storage device transmitting configuration data to a preamp circuit over a read line

Channel circuit with asynchronous sampling from an oversampled analog-to-digital converter

Dark laser heating by positive pulse biasing in heat assisted magnetic recording

Data storage device comprising dual channel preamp circuit

Multiple-actuator HDD assembly utilizing multiple-preamp architecture with single point termination

Positive laser bias electrical control architecture for dark laser heating in heat assisted magnetic recording

HAMR thermal sensor with fast response time

HGST Netherlands BV

TAR temperature sensor having faster response time

Dual thermal sensor for HAMR waveguide power monitor and integration with the contact sensor

Laser power sensor with dual temperature sensor

HAMR thermal sensor with fast response time

Magnetic write head having dual parallel capacitors for integrated transmission line compensation

Transducer resistor shunt structure for low-cost probing

IBM

Accurate current source with an adjustable temperature dependence circuit

Using a read element and a read/write coupling path to detect write-safe conditions

By-pass write drivers for high-performance data recording

Low noise amplifier circuit for magnetoresistive sensors for fast read-write switching in low supply voltage applications

Recording channel with voltage-type write driver for use with transmission-line interconnect

High-transition-rate, low-supply-voltage write driver circuitry for magnetic inductive write head

CONTRERAS JOHN T

Tunable microstrip signal transmission path in a hard disk drive

Conductor suspension structure and electrical connection assembly for transmitting complementary signals in a hard disk drive

Interleaved conductor structure with offset traces

Interleaved conductor structure with wrap around traces

HITACHI GLOBAL STORAGE TECH

Method and system for pre-contact detection and active damping of air bearing vibrations in a hard disk drive

BAUMGART PETER

Fly-height management in a hard disk drive (HDD)