Patents (Danny Abramovitch)

(Pending/Agilent) (Filed 2008) An application on a high speed coherent demodulation method to improve the control of Atomic Force Microscopes (AFMs).

(Pending/Agilent) (Filed 2007) An application on a method of quasi-automatically tuning PID parameters to improve the control of Atomic Force Microscopes (AFMs).

(Pending/Agilent) (Filed 2007) An application on the use of non-raster scan methods for Atomic Force Microscopes (AFMs).

(Pending/Agilent) (Filed 2007) An application on image decimation methods for Atomic Force Microscopes (AFMs).

(Pending/Agilent) (Filed 2006) Two applications on using advanced control and signal processing to improve the images one gets from Atomic Force Microscopes (AFMs).

The following was issued January 22, 2008: US Patent #: 7,321,840 Apparatus for Monitoring Tire Pressure. This patent relates to solving a fundamental problem with tire pressure measurements.

(Pending/Agilent) (Filed 2005) This patent application relates to Intelligent Test Point Selection for devices other than bit error rate testers.

(Abandoned/Avago) (Filed 2004) Optical Navigation System for Vehicles. This application used optical mouse technology for tracking vehicle motion relative to the road.

(Pending/Agilent) (Filed 2003) Systems and Methods for Processing Instrument Data. This patent application relates making measurement data easily accessible to any software application.

(Pending/Verigy) (Filed 2003) Method for Guaranteeing Stable Non-Linear PLLs. This patent application uses Lyapunov redesign on a common class of non-linear PLLs to guarantee their stability.

(Pending/Agilent) (Filed 2002) This patent application relates a novel design method for certain classes of phase-locked loops.

(Abandoned/Agilent) (Filed 2001) System and Method for Creating Web Pages from Processed Instrument Measurement Data. . This patent application taught a method for generating web pages directly from processed measurement data.

The following was issued December 6, 2005.: US Patent #: 6,973,599 Method and System for Constructing Valid Data for Memory-Based Tests . This patent relates to data generation for memory based Bit Error Ratio testing. Specifically, it allows for memory based SONET patterns to be generated, despite the fact that to cycle through a set of memory based patterns, the first SONET frame would need to have been constructed with parity information from the last SONET frame. Also, I got to use Dirk Gently's Holistic Detective Agency as part of the prior art. How cool is that?

The following was issued November 1, 2005.: US Patent #: 6,961,317 Identifying and Synchronizing Permuted Channels in a Parallel Bit Error Rate Tester . This patent application relates to synchronization in parallel channel Bit Error Ratio testers. The European Patent (# 1298830), was granted April 27, 2005.

The following was issued June 1, 2004.: US Patent #: 6,745,148 Intelligent Test Point Selection for Bit Error Rate Tester-Based Diagrams. This patent is about how to intelligently select measurement points for eye diagrams produced by BERTs. The European Patent (# 1370021), was granted November 23, 2005.

The following was issued August 9, 2005.: US Patent # 6,928,036: Harmonic Correction in Phase-Locked Loops. (This contains the method claims. It's 6 claims are generally about removing harmonic disturbances from PLLs.) This patent relates to using harmonic correction, often used to reject harmonic disturbances in rotating machinery, in the phase lock look on an optical disk. The idea is that a removable opical disk is almost always not perfectly centered on the spindle, causing the tracks to fly in a non-circular path. A read head following the path would see timing variations, and thus a PLL trying keep precise synchronization with the track on a disk can make use of harmonic correction to improve the time tracking. I am the chief inventor. Other inventors included Mike Fischer, Josh Hogan, and Carl Taussig.

The following was issued November 11, 2003.: US Patent # 6,646,964: Harmonic Correction in Phase-Locked Loops. (This contains the apparatus claims. It's 4 claims are specific to removable disk media.) This patent relates to using harmonic correction, often used to reject harmonic disturbances in rotating machinery, in the phase lock look on an optical disk. The idea is that a removable opical disk is almost always not perfectly centered on the spindle, causing the tracks to fly in a non-circular path. A read head following the path would see timing variations, and thus a PLL trying keep precise synchronization with the track on a disk can make use of harmonic correction to improve the time tracking. I am the chief inventor. Other inventors included Mike Fischer, Josh Hogan, and Carl Taussig.

The following was issued May 21, 2002.: US Patent # 6,393,596: Missing Pulse Detector Using Synchronous Detection. This was a proposed method for encoding addresses into high frequency wobbles for DVD+RW. The idea was to have some wobbles missing and that the position of the detected missing pulse. This was an effective and intriguing idea, but we could never get it past our partners at Philips, so it was not part of the current implemented DVD+RW format. Note that unlike most of these, I had a minor role on this patent. The chief inventors were Mike Fischer and Josh Hogan. Other inventors included Terril Hurst and Carl Taussig.

The following was issued April 4, 2000.: US Patent # 6,046,968: Re-Writable Optical Disk Having Reference Clock Information Permanently Formed on the Disk. This is the high frequency wobbles patent, which directly led to the DVD+RW format. In November, 2001, those members of the project team that were still at HP Labs were given the Joel Birnbaum Prize, the highest internal award given by HP Labs. The idea first came to me back in September of 1996, when I first joined the project team. However, it sat for a few months, and was only made practical by the considerable knowledge of optics by my co-inventor, David Towner.

The following was issued June 1, 1999. The application was filed May 30, 1997 and was allowed in ???: US Patent # 5,909,661: Method and Apparatus for Decomposing Drive Derror Signal Noise Sources. This is the PES Pareto Patent. The work is summarized below, and was be published at the 1997 American Controls Conference, The Magnetic Recording Conference (TMRC) 1997, the and in the January 1998 IEEE Transactions on Magnetics.

The following was issued September 1, 1998. The application was filed May 28, 1996 and was allowed in September/October 1997: US Patent # 5,801,895: A Disk Drive Servo Demodulation System Which Suppresses Noise on the Position Error Signal. This is the customizable, coherent servo demodulation discsussed below, and will be published at the 1998 American Controls Conference and in the September 1998 IEEE/ASME Transactions on Mechatronics.

The following patent was issued September 2, 1997: US Patent # 5,663,847: Rejection of Disturbances on a Disk Drive By Use of an Accelerometer. This patent deals with removing the effects of external shock and vibration from a disk drive by using an accelerometer signal in a multi-rate, adaptive algorithm.

The following patent was issued in August of 1995: US Patent # 5,446,648: Determination of Open Loop Response from Closed Loop Measurements. This patent deals with extracting open loop responses from closed-loop measurements of multivariable systems.