John H Jacobs

US Patent:

20130207824, Aug 15, 2013

Filed:

Aug 17, 2012

Appl. No.:

13/588643

Inventors:

Richard Waters - San Diego CA, US
Brad Chisum - San Diego CA, US
Mark Fralick - San Diego CA, US
John D. Jacobs - San Diego CA, US
Ricardo Dao - San Diego CA, US
David Carbonari - Murrieta CA, US
Jacques Leveilli - Houston TX, US

International Classification:

H03M 1/12

US Classification:

341155

Abstract:

A time domain switching analog-to-digital converter apparatus and methods of utilizing the same. In one implementation, the converter apparatus comprises a carrier signal source, and at least one reference source. The carrier signal is summed with the input signal and the summed modulated signal is fed to a comparator circuit. The comparator is configured detects crossings of the reference level by the modulated waveform thereby generating trigger events. The time period between consecutive trigger events is used to obtain modulated signal deviation due to the input signal thus enabling input signal measurement. Control of the carrier oscillation amplitude and frequency enables real time adjustment of the converter dynamic range and resolution. The use of additional reference signal levels increases sensor frequency response and accuracy. A dual channel converter apparatus enables estimation and removal of common mode noise, thereby improving signal conversion accuracy.

US Patent:

20170003314, Jan 5, 2017

Filed:

Jun 30, 2016

Appl. No.:

15/198924

Inventors:

- San Diego CA, US
Xiaojun Huang - San Diego CA, US
John David Jacobs - San Diego CA, US
Yanting Zhang - San Diego CA, US
Mark Steven Fralick - San Diego CA, US

International Classification:

G01P 15/125

Abstract:

Sensors and systems are described herein for out-of-plane sensing. In particular, the sensors and systems relate to vibratory inertial sensors implementing time-domain sensing techniques with linear combinations of multiple signals. In out-of-plane sensing, these multiple signals may be produced from a single sense mass oscillation. Time intervals produced from linear combinations of these multiple signals can be used to measure inertial parameters, such as acceleration, and other values of interest.

US Patent:

20160341758, Nov 24, 2016

Filed:

May 20, 2016

Appl. No.:

15/160091

Inventors:

- San Diego CA, US
Mark Steven Fralick - San Diego CA, US
John David Jacobs - San Diego CA, US

Assignee:

Lumedyne Technologies Incorporated - San Diego CA

International Classification:

G01P 15/08
G01C 19/04

Abstract:

Systems and methods are described herein for extracting inertial information from nonlinear periodic signals. A system for determining an inertial parameter can include circuitry configured for receiving a first periodic analog signal from a first sensor that is responsive to motion of a proof mass, converting the first periodic analog signal to a first periodic digital signal, determining a result of trigonometrically inverting a quantity, the quantity based on the first periodic digital signal, and determining the inertial parameter based on the result.

US Patent:

20160341761, Nov 24, 2016

Filed:

Aug 3, 2016

Appl. No.:

15/227773

Inventors:

- San Diego CA, US
John David Jacobs - San Diego CA, US
Xiaojun Huang - San Diego CA, US
Yanting Zhang - San Diego CA, US
Mark Steven Fralick - San Diego CA, US

International Classification:

G01P 15/125
G01C 19/5726

Abstract:

Systems and methods are disclosed herein for extracting system parameters from nonlinear periodic signals from sensors. A sensor such as an inertial device includes a first structure and a second structure that is springedly coupled to the first structure. The sensor is configured to generate an output voltage based on a current between the first and second structures. Monotonic motion of the second structure relative to the first structure causes a reversal in direction of the current.

US Patent:

20160341762, Nov 24, 2016

Filed:

May 20, 2016

Appl. No.:

15/160098

Inventors:

- San Diego CA, US
Mark Steven Fralick - San Diego CA, US
John David Jacobs - San Diego CA, US

International Classification:

G01P 21/00
G01P 15/08

Abstract:

Systems and methods are described herein for extracting inertial information from nonlinear periodic signals. A system for determining an inertial parameter can include circuitry configured for receiving first and second analog signals from first and second sensors, each sensor responsive to motion of a proof mass. The system can include circuitry configured for determining a difference between the first and second analog signals, determining a plurality of timestamps corresponding to times at which the difference crosses a threshold, and determining a plurality of time intervals based on the timestamp. The system can include circuitry configured for determining a result of applying a trigonometric function to a quantity, the quantity based on the plurality of time intervals and determining the inertial parameter based on the result.

US Patent:

20150377622, Dec 31, 2015

Filed:

Jun 26, 2015

Appl. No.:

14/751727

Inventors:

- San Diego CA, US
John David Jacobs - San Diego CA, US
Jeffrey Alan Brayshaw - San Diego CA, US
Brad Wesley Chisum - San Diego CA, US
Mark Steven Fralick - San Diego CA, US
Xiaojun Huang - San Diego CA, US

International Classification:

G01C 19/5705

Abstract:

Systems and methods are disclosed herein for determining rotation. A gyroscope includes a drive frame and a base, the drive frame springedly coupled to the base. The gyroscope includes a drive structure configured for causing a drive frame to oscillate along a first axis. The gyroscope includes a sense mass springedly coupled to the drive frame. The gyroscope includes a sense mass sense structure configured for measuring a displacement of the sense mass along a second axis orthogonal to the first axis. The gyroscope includes measurement circuitry configured for determining a velocity of the drive frame, extracting a Coriolis component from the measured displacement, and determining, based on the determined velocity and extracted Coriolis component, a rotation rate of the gyroscope.

US Patent:

20150377623, Dec 31, 2015

Filed:

Jun 26, 2015

Appl. No.:

14/751745

Inventors:

- San Diego CA, US
Xiaojun Huang - San Diego CA, US
Yanting Zhang - San Diego CA, US
John David Jacobs - San Diego CA, US
Mark Steven Fralick - San Diego CA, US

International Classification:

G01C 19/5705

Abstract:

Systems and methods are disclosed herein for determining rotation. A gyroscope includes a drive frame and a base, the drive frame springedly coupled to the base. The gyroscope includes a drive structure configured for causing a drive frame to oscillate along a first axis. The gyroscope includes a sense mass springedly coupled to the drive frame. The gyroscope includes a sense mass sense structure configured for measuring a displacement of the sense mass along a second axis orthogonal to the first axis. The gyroscope includes measurement circuitry configured for determining a velocity of the drive frame, extracting a Coriolis component from the measured displacement, and determining, based on the determined velocity and extracted Coriolis component, a rotation rate of the gyroscope.

US Patent:

20150377916, Dec 31, 2015

Filed:

Jun 26, 2015

Appl. No.:

14/751347

Inventors:

- San Diego CA, US
John David Jacobs - San Diego CA, US
Xiaojun Huang - San Diego CA, US
Yanting Zhang - San Diego CA, US
Mark Steven Fralick - San Diego CA, US

International Classification:

G01P 15/125

Abstract:

Systems and methods are disclosed herein for extracting system parameters from nonlinear periodic signals from sensors. A sensor such as an inertial device includes a first structure and a second structure that is springedly coupled to the first structure. The sensor is configured to generate an output voltage based on a current between the first and second structures. Monotonic motion of the second structure relative to the first structure causes a reversal in direction of the current.