Christopher A Lyons

US Patent:

20120041343, Feb 16, 2012

Filed:

Aug 10, 2011

Appl. No.:

13/207073

Inventors:

Christopher Thomas Lyons - Tyngsboro MA, US
Ellen M. Lyons - Tyngsboro MA, US
Stephen Thomas Lyons - Hudson NH, US

International Classification:

A61B 5/103

US Classification:

600587

Abstract:

An apparatus for detecting sleep disorders, such as obstructive sleep apnea, includes a housing insertable into an ear canal of a subject. A sensor disposed within the housing measures a position of the subject's head relative to an axis of gravity. A transducer is responsive to the sensor and is capable of creating a stimulus detectable by the subject under certain conditions. In various embodiments, a controller receives signals corresponding to a pitch angle and a roll angle of the subject's head measured by the sensor, determines if the pitch and roll angles correspond to a sleep apnea inducing position, and causes the transducer to generate a stimulus upon determining that the subject's head is in the sleep apnea inducing position more than a predetermined threshold number of times. Various parameters of the stimulus may be modified with successive stimulus generation until a non-sleep apnea inducing position is detected.

US Patent:

20130021158, Jan 24, 2013

Filed:

Sep 26, 2012

Appl. No.:

13/627597

Inventors:

Christopher Thomas Lyons - Tyngsboro MA, US
Ellen M. Lyons - Tyngsboro MA, US
Stephen Thomas Lyons - Hudson NH, US

International Classification:

G08B 21/06

US Classification:

340575

Abstract:

An apparatus for detecting sleep disorders, such as obstructive sleep apnea, includes a housing insertable into an ear canal of a subject. A sensor disposed within the housing measures a position of the subject's head relative to an axis of gravity. A transducer is responsive to the sensor and is capable of creating a stimulus detectable by the subject under certain conditions. In various embodiments, a controller receives signals corresponding to a pitch angle and a roll angle of the subject's head measured by the sensor, determines if the pitch and roll angles correspond to a sleep apnea inducing position, and causes the transducer to generate a stimulus upon determining that the subject's head is in the sleep apnea inducing position more than a predetermined threshold number of times. Various parameters of the stimulus may be modified with successive stimulus generation until a non-sleep apnea inducing position is detected.

US Patent:

20130328633, Dec 12, 2013

Filed:

Mar 14, 2013

Appl. No.:

13/827225

Inventors:

Christopher T. Lyons - Tyngsboro MA, US

Assignee:

Hittite Microwave Corporation - Chelmsford MA

International Classification:

H03L 7/00

US Classification:

331 34

Abstract:

An injection locked pulsed oscillator includes a voltage controlled oscillator (VCO) responsive to an injection signal. The injection locked pulsed oscillator includes at least one enable circuit responsive to a first enable signal to enable output pulses from the VCO. The injection locked pulsed oscillator also includes timing circuit responsive to a pulse repetition frequency signal and is configured to provide the injection signal to phase lock the VCO and provide the first enable signal delayed from the injection signal to shape a width of the output pulses from the VCO.

US Patent:

61950610, Feb 27, 2001

Filed:

Oct 6, 1998

Appl. No.:

9/167117

Inventors:

Altunkan Hizal - Ankara, TR
Christopher T. Lyons - Tyngsboro MA

Assignee:

Hittite Microwave Corp. - Chelmsford MA

International Classification:

H01Q 1300

US Classification:

343786

Abstract:

A miniature horn antenna includes a housing forming a skewed beam sectoral horn, the housing forming first and second divergent walls having a primary axis in which at least one of the first and second divergent walls is transverse to the primary axis, a rear wall joining the first and second divergent walls, and a first side wall; a feed probe in front of the rear wall and between the first and second divergent walls; and a second side wall.

US Patent:

58725369, Feb 16, 1999

Filed:

Feb 19, 1997

Appl. No.:

8/808939

Inventors:

Christopher T. Lyons - Tyngsboro MA
Ismail Taskin - Arlington MA

Assignee:

Hittite Microwave Corporation - Woburn MA

International Classification:

G01S 1393

US Classification:

342 70

Abstract:

A multi-sensor anticipatory object detection system for detecting the instantaneous range, relative velocity, collision angle and point of impact of a colliding object includes a plurality of transducer devices angle a fixed distance in which each said transducer device transmits a modulated carrier signal and receives the reflected modulated carrier signal from an object; a detection device for detecting a plurality of Doppler shifted harmonic components from each said reflected signal; a range determining device, responsive to the amplitudes of said harmonic components, for determining the instantaneous range of said object from each said transducer device; a velocity measurement device, responsive to the frequency of said harmonic components, for determining the relative instantaneous velocity of said object; and an impact decision device, responsive to said range determining device and the velocity measurement device, for determining where, if at all, impact with the object will occur and the angle of the impact prior to impact with the object.

US Patent:

58390960, Nov 17, 1998

Filed:

Mar 10, 1997

Appl. No.:

8/814102

Inventors:

Christopher T. Lyons - Tyngsboro MA
Ismail Taskin - Arlington MA

Assignee:

Hittite Microwave Corporation - Woburn MA

International Classification:

G01S 740

US Classification:

702183

Abstract:

A self-implementing, self-diagnostic system for an anticipatory collision sensor system includes a transducer device for transmitting a modulated carrier signal and receiving the reflected modulated carrier signal from an object; a detection device for detecting a plurality of Doppler shifted harmonic components from the reflected modulated carrier signal; a range determining device responsive to the amplitude of at least two of the harmonic components for determining the instantaneous range of the object; a velocity measurement device, responsive to the frequency of at least one of the harmonic components, for determining the relative, instantaneous velocity of the object; an indicating device, responsive to at least one of the modulated carrier signal, the reflected modulated carrier signal, the amplitude, and the frequency, to indicate the condition of the system.

US Patent:

62258915, May 1, 2001

Filed:

Jan 7, 2000

Appl. No.:

9/478841

Inventors:

Christopher T. Lyons - Tyngsboro MA
Ismail Taskin - Arlington MA

Assignee:

Hittite Microwave Corp. - Chelmsford MA

International Classification:

B60Q 100

US Classification:

340435

Abstract:

A wide angle, static, positional anticipatory object detection system includes a transducer device for transmitting a modulated carrier signal and receiving the modulated carrier signal reflected from an object, a detection device for detecting a plurality of Doppler shifted harmonic components from the reflected modulated carrier signal, a range determining device responsive to the amplitudes of at least two of the harmonic components being equal for determining the instantaneous range of the object and, a predetermined distance thereafter, to a predetermined difference between the amplitudes of at least two of the harmonic components. The system also includes a Doppler period measurement device responsive to at least one of the harmonic components for measuring the Doppler periods of that harmonic component and a collision decision device, responsive to the range determining device and the Doppler period measurement device, for indicating that a collision with the object is imminent and the offset of the collision from the detection device before contact is made.

US Patent:

51500809, Sep 22, 1992

Filed:

Dec 12, 1991

Appl. No.:

7/806956

Inventors:

Michael J. Bianchini - North Middleboro MA
Christopher T. Lyons - Tyngsboro MA
Richard A. Michalik - Andover MA
Raymond C. Waterman - Westford MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H03B 104
H03B 518

US Classification:

331 99

Abstract:

An oscillator includes an amplifier having an input and an output and a feedback circuit disposed between the input and the output of the amplifier. The feedback circuit includes a plurality of resonators and a pair of switches. Each switch includes a first port and multiple connectable ports, the multiple connectable ports of each switch connected to a corresponding one of the plurality of resonators. The feedback circuit further includes a voltage-controlled phase shifter disposed in series with the switches. The oscillator further includes a discriminator circuit, responsive to signals from the feedback circuit, for providing a control signal to the voltage-controlled phase shifter for degenerating low frequency noise within the oscillator. With such an arrangement, high Q low noise resonators can be switched in and out of the circuit thus providing improved phase noise performance at high power levels with the desirable frequency agility required for a microwave oscillator.