Inventor
Richard T. Behrens
Inventor
Louisville, CO, US
Overview
Patents· 78 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer40%
H04BTransmission17%
H04LTransmission of digital information, e.g. telegraphic communication16%
H03MCoding12%
H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses5%
H03HImpedance networks, e.g. resonant circuits2%
H04HBroadcast communication2%
C09KMaterials for miscellaneous applications, not provided for elsewhere1%
E21BEarth or rock drilling1%
G01SRadio direction-finding1%
PatentTitleYear
11,105,890Frequency modulated signal cancellation in variable power mode for radar applications202110,975,291Method of selection of asphaltene precipitant additives and process for subsurface upgrading therewith20219,153,264'Method and apparatus for determining radial incoherence between servo tracks'20159,025,274'Method and apparatus for writing to and reading from multiple drive heads'20158,948,708'Partitioned radio-frequency apparatus and associated methods'20158,913,345'System and method for reading data from a magnetic medium by utilizing plural read sensors which define an effective read width'20148,843,080'Partitioned radio-frequency apparatus and associated methods'20148,467,483'Radio-frequency apparatus and associated methods'20138,422,964'Partitioned radio-frequency apparatus and associated methods'20138,224,259'Digital architecture for radio-frequency apparatus and associated methods'20128,195,115'Receiver architectures for digital radio broadcasts and associated methods'20128,054,918'Wireless communication system and method with frequency burst acquisition feature using autocorrelation'20117,957,370'Synchronous read channel'20117,949,319'Receiver architectures for digital radio broadcasts and associated methods'20117,941,102'Partitioned radio-frequency apparatus and associated methods'20117,885,255'Synchronous read channel'20117,702,362'Digital architecture for radio-frequency apparatus and associated methods'20107,567,637'Wireless communication system and method with frequency burst acquisition feature using autocorrelation and narrowband interference detection'20097,379,452'Synchronous read channel'20087,366,478'Partitioned radio-frequency apparatus and associated methods'20087,242,912'Partitioning of radio-frequency apparatus'20077,228,109'DC offset reduction in radio-frequency apparatus and associated methods'20077,221,921'Partitioning of radio-frequency apparatus'20077,177,610'Calibrated low-noise current and voltage references and associated methods'20077,138,858'Apparatus and methods for output buffer circuitry with constant output power in radio-frequency circuitry'20067,092,675'Apparatus and methods for generating radio frequencies in communication circuitry using multiple control signals'20067,035,611'Apparatus and method for front-end circuitry in radio-frequency apparatus'20067,031,683'Apparatus and methods for calibrating signal-processing circuitry'20067,024,221'Notch filter for DC offset reduction in radio-frequency apparatus and associated methods'20066,993,314'Apparatus for generating multiple radio frequencies in communication circuitry and associated methods'20066,970,717'Digital architecture for radio-frequency apparatus and associated methods'20056,819,514'Adaptive equalization and interpolated timing recovery in a sampled amplitude read channel for magnetic recording'20046,804,497'Partitioned radio-frequency apparatus and associated methods'20046,646,822'Sampled amplitude read channel employing pipelined reads to reduce the gap between sectors'20036,345,074'Maximum likelihood servo detector for detecting an error correcting servo code recorded on a disc storage medium'20026,313,961'Method and apparatus for calibrating a synchronous read channel integrated circuit'20016,307,694'Error signal biasing for an adaptive filter in a disk drive read channel'20016,208,481'Gain and phase constrained adaptive equalizing filter in a sampled amplitude read channel for magnetic recording'20016,108,151'Sampled amplitude read channel for reading user data and embedded servo data from a magnetic medium'20006,021,011'Synchronous read channel employing a digital center frequency setting for a variable frequency oscillator in discrete time timing recovery'20006,009,549'Disk storage system employing error detection and correction of channel coded data, interpolated timing recovery, and retroactive/split-segment symbol synchronization'19996,005,731'Channel quality circuit employing a test pattern generator in a sampled amplitude read channel for calibration'19996,005,727'Servo decoder for decoding an error correcting servo code recorded on a disc storage medium'19995,999,355'Gain and phase constrained adaptive equalizing filter in a sampled amplitude read channel for magnetic recording'19995,991,107'Sychronous read channel'19995,987,634'Channel quality circuit in a sampled amplitude read channel'19995,978,162'Synchronous read channel integrated circuit employing a channel quality circuit for calibration'19995,966,257'Synchronous read channel integrated circuit employing discrete time timing recovery'19995,917,668'Synchronous read channel employing a frequency synthesizer for locking a timing recovery phase-lock loop to a reference frequency'19995,909,332'Sampled amplitude read channel employing interpolated timing recovery'19995,909,331'Synchronous read channel sintegrated circuit employing a fault tolerant sync mark detector and method for recovering an undetectable sync mark'19995,903,857'Method and apparatus for calibrating an analog filter in a sampled amplitude read channel'19995,892,632'Sampled amplitude read channel employing a residue number system FIR filter in an adaptive equalizer and in interpolated timing recovery'19995,867,331'Synchronous read channel processing more than one channel sample at a time to increase throughput'19995,862,161'Sampled amplitude read channel with simplified sequence detector matched to partial erasure'19995,844,911'Disc storage system with spare sectors dispersed at a regular interval around a data track to reduced access latency'19985,844,509'Synchronous read channel employing a data randomizer'19985,844,738'Synchronous read channel employing a sequence detector with programmable detector levels'19985,835,295'Zero phase restart interpolated timing recovery in a sampled amplitude read channel'19985,812,334'Synchronous read channel employing discrete timing recovery, transition detector, and sequence detector'19985,802,118'Sub-sampled discrete time read channel for computer storage systems'19985,796,535'Sampled amplitude read channel employing a user data frequency synthesizer and a servo data frequency synthesizer'19985,786,951'Sampled amplitude read channel employing a discrete time noise generator for calibration'19985,771,127'Sampled amplitude read channel employing interpolated timing recovery and a remod/demod sequence detector'19985,760,984'Cost reduced interpolated timing recovery in a sampled amplitude read channel'19985,761,212'Channel quality'19985,754,353'Channel quality circuit in a sampled amplitude read channel'19985,754,352'Synchronous read channel employing an expected sample value generator for acquiring a preamble'19985,729,396'Fault tolerant sync mark detector enabled relative to a frequency of an acquisition preamble for sampled amplitude recording'19985,717,619'Cost reduced time varying fir filter'19985,696,639'Sampled amplitude read channel employing interpolated timing recovery'19975,623,377'Filtering a read signal to attenuate secondary pulses caused by pole tips of a thin film magnetic read head'19975,576,904'Timing gradient smoothing circuit in a synchronous read channel'19965,424,881'Synchronous read channel'19955,359,631'Timing recovery circuit for synchronous waveform sampling'19945,329,554'Digital pulse detector'19945,297,184'Gain control circuit for synchronous waveform sampling'19945,291,499'Method and apparatus for reduced-complexity viterbi-type sequence detectors'1994Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1994–2004Patents assigned to CIRRUS LOGIC INC (45)· patent assignee history
1994–2011Based in Louisville, CO, US· patent location history
1997–1999Based in Littleton, CO, US· patent location history
1998–2013Based in Lafayette, CO, US· patent location history
2004–2015Patents assigned to SILICON LAB INC (20)· patent assignee history
2012–2013Patents assigned to BEHRENS RICHARD T (4)· patent assignee history
2012–2013Patents assigned to TUTTLE G TYSON (4)· patent assignee history
2012–2013Patents assigned to KERTH DONALD A (3)· patent assignee history
2014–2015Based in Santa Clara, CA, US· patent location history
2021Based in Basalt, CO, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CIRRUS LOGIC INC | 45 | 1994–2004 |
| SILICON LAB INC | 20 | 2004–2015 |
| BEHRENS RICHARD Tself | 4 | 2012–2013 |
| TUTTLE G TYSON | 4 | 2012–2013 |
| KERTH DONALD A | 3 | 2012–2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Louisville, CO, US | 41 | 1994–2011 |
| Lafayette, CO, US | 27 | 1998–2013 |
| Santa Clara, California, US | 4 | 2014–2015 |
| Littleton, CO, US | 2 | 1997–1999 |
| Basalt, CO, US | 1 | 2021 |