Antonio J Palacios

US Patent:

7196590, Mar 27, 2007

Filed:

Jun 18, 2004

Appl. No.:

10/874010

Inventors:

Visarath In - Chula Vista CA, US
Yong (Andy) Kho - San Diego CA, US
Joseph D. Neff - San Diego CA, US
Brian K. Meadows - San Diego CA, US
Patrick Longhini - Rancho Bernardo CA, US
Antonio Palacios - San Diego CA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H03K 3/03

US Classification:

331 53, 331 2

Abstract:

Certain spatio-temporal symmetries induce one array of a two-array coupled network of oscillators to oscillate at N times the frequency of the other array, where N is the number of oscillators in each array.

US Patent:

7420366, Sep 2, 2008

Filed:

Jun 18, 2004

Appl. No.:

10/874009

Inventors:

Visarath In - Chula Vista CA, US
Antonio Palacios - San Diego CA, US
Yong Kho - San Diego CA, US
Adi R. Bulsara - San Diego CA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01R 33/04

US Classification:

324253, 324244

Abstract:

A sensor system employing a plurality of nonlinear sensors utilizes a coupling network to interconnect the sensors wherein the coupling network inherently induces oscillations in the sensor system. This approach removes the need to provide bias signal generation either onboard the sensors or via a source external to the sensor.

US Patent:

7528606, May 5, 2009

Filed:

Apr 4, 2007

Appl. No.:

11/732678

Inventors:

Visarath In - Chula Vista CA, US
Antonio Palacios - San Diego CA, US
Yong Ko - San Diego CA, US
Adi R. Bulsara - San Diego CA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01B 3/08
G01R 33/04

US Classification:

324326, 32420716, 324253

Abstract:

A coupled non-linear sensor system is provided for sensing a non-sinusoidal time-dependent target signal. The system comprises an odd number, other than one, of interconnected oscillatory sensors for sensing time-dependent changes in an external magnetic flux generated by the non-sinusoidal time-dependent target signal, the sensors coupled to each other by a coupling parameter characterized by a threshold value, so that each of the sensors oscillates in the presence of the non-sinusoidal time-dependent target signal as the coupling parameter exceeds the threshold value.

US Patent:

7898250, Mar 1, 2011

Filed:

Sep 21, 2007

Appl. No.:

11/858966

Inventors:

Visarath In - Chula Vista CA, US
Adi R. Bulsara - San Diego CA, US
Yong (Andy) Kho - San Diego CA, US
Joseph D. Neff - San Diego CA, US
Antonio Palacios - San Diego CA, US
Salvatore Baglio - Catania, IT
Vincenzo Sacco - Catania, IT

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01R 33/04

US Classification:

324253

Abstract:

An apparatus for sensing and processing a magnetic flux signal comprising: an odd number of at least three fluxgate modules, a summer, and a processor. Each fluxgate module is configured to generate a module response signal upon receiving the magnetic flux signal. The fluxgate modules are circularly coupled to each other such that only one-way signal flow is allowed between them. The summer is configured to sum the response signals from each fluxgate module into a summed signal. The processor is configured to receive and process the summed signal.

US Patent:

8049486, Nov 1, 2011

Filed:

Jul 17, 2008

Appl. No.:

12/175262

Inventors:

Visarath In - Chula Vista CA, US
Adi R. Bulsara - San Diego CA, US
Yong (Andy) An Kho - Chula Vista CA, US
Antonio Palacios - San Diego CA, US
Salvatore Baglio - Catania, IT
Bruno Ando - Catania, IT

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01R 31/02
G01R 29/12

US Classification:

324 72, 324457

Abstract:

In various embodiments, an apparatus for detecting electric fields is disclosed that includes an array of non-linear elements configured into an oscillator with each coupled to one or more electric-field sensing plates. In various embodiments, an output of the array produces a frequency that varies as a function of an electric field sensed by the one or more electric-field sensing plates.

US Patent:

8049570, Nov 1, 2011

Filed:

Mar 25, 2010

Appl. No.:

12/732023

Inventors:

Visarath In - Chula Vista CA, US
Patrick Longhini - San Diego CA, US
Yong (Andy) An Kho - Chula Vista CA, US
Joseph D. Neff - San Diego CA, US
Antonio Palacios - San Diego CA, US
Norman Liu - San Diego CA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H03K 3/03
G01R 33/00

US Classification:

331 57, 331 49, 331 74, 331172, 324227, 324260

Abstract:

An electrical/magnetic current sensing system includes a first collection mechanism configured to convert an electric field into surface charge, a second collection mechanism comprising a magnetic reactive material, and a sensor coupled to the first and second collection mechanisms. The sensor comprises an odd number, greater than or equal to three, of unidirectionally-coupled non-linear over-damped bi-stable elements. Each element comprises a resistive load, an operational transconductance amplifier (OTA) with a bipolar junction transistor differential pair, a cross-coupled OTA, and a non-linear OTA. Each element may comprise fully differential inputs and outputs. The sensor may be contained in a microchip or on a printed circuit board. A resident time difference readout device may be connected to the sensor, and may be configured to perform a power spectral density calculation. The sensor may include a resistance to voltage circuit connected between the second collection mechanism and the elements.

US Patent:

8212569, Jul 3, 2012

Filed:

Mar 29, 2010

Appl. No.:

12/749338

Inventors:

Visarath In - Chula Vista CA, US
Norman Liu - San Diego CA, US
Patrick Longhini - San Diego CA, US
Yong (Andy) Kho - Chula Vista CA, US
Joseph D. Neff - San Diego CA, US
Adi R. Bulsara - San Diego CA, US
Antonio Palacios - San Diego CA, US

Assignee:

The United States of America, as represented by the Secretary of the Navy - Washington DC

International Classification:

G01R 29/12
G01R 31/02

US Classification:

324457, 324 72

Abstract:

An ambient electric field detector comprising: a collection mechanism disposed to generate a current signal in response to the ambient electric field; an input current mirror operatively coupled to the collection mechanism and disposed to amplify and duplicate the current signal to generate a duplicate signal; and an odd number (i) of at least three nonlinear, over-damped, bi-stable elements coupled uni-directionally in a ring such that the ring of elements oscillates, wherein at least one of the elements has a different initial state than the other elements and each element is disposed to receive the duplicate signal.

US Patent:

20150084704, Mar 26, 2015

Filed:

Sep 26, 2013

Appl. No.:

14/037546

Inventors:

Visarath In - Chula Vista CA, US
Patrick Longhini - San Diego CA, US
Yong (Andy) Kho - Chula Vista CA, US
Antonio Palacios - San Diego CA, US

International Classification:

H03K 3/03

US Classification:

331 52

Abstract:

A cascaded oscillator array includes a first oscillator array and a second oscillator array. The first oscillator array includes at least three oscillator elements coupled unidirectionally in a first ring such that the first oscillator array outputs a first oscillating signal. Each of the at least three oscillator elements is coupled to receive a signal from a sensing element. The second oscillator array includes at least three oscillator elements coupled unidirectionally in a second ring such that the second oscillator array outputs a second oscillating signal. A first number of the at least three oscillator elements of the first oscillator array is the same as a second number of the at least three oscillator elements of the second oscillator. Each oscillator element of the at least three oscillator elements of the second oscillator array is coupled to receive an output signal from a single oscillator element of the at least three oscillator elements of the first oscillator.