Patrick A Longhini

7777535, Aug 17, 2010

May 22, 2008

12/125397

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
Adi R. Bulsara - San Diego CA, US

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

H03B 19/00

327117, 327113

In various embodiments, an apparatus for down-converting a first signal having a first frequency to a lower frequency is disclosed. The apparatus can include one or more arrays of N over-damped, bi-stable circuits unidirectionally-coupled from element to element.

7902931, Mar 8, 2011

Feb 24, 2009

12/391508

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
Adi R. Bulsara - San Diego CA, US
Frank E. Gordon - San Diego CA, US
Norman Liu - San Diego CA, US
Suketu Naik - Kyoto, JP

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

H03B 1/00
H03L 7/24
H04J 1/00
H04J 1/02

331 55, 331 50, 331 75, 370343, 370497

A device includes a plurality of channel-capture circuits. Each circuit may include an array of N non-linear oscillators, wherein N≧3, circularly connected to each other in series such that unidirectional signal flow occurs between the oscillators. Each circuit may be configured to capture a respective channel signal from a wideband signal containing a plurality of channel signals and convert its captured channel signal to a lower frequency. Each oscillator may include an oscillator input configured to receive an output signal from another oscillator, an oscillator output configured to provide an output for an input of another oscillator, a frequency capture input configured to receive at least a portion of the wideband signal, at least two amplifiers, and a control capacitor coupled to the output of the amplifiers. An analog-to-digital converter may be coupled to the output of each channel-capture circuit.

8049570, Nov 1, 2011

Mar 25, 2010

12/732023

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

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

H03K 3/03
G01R 33/00

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

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.

8165557, Apr 24, 2012

Sep 17, 2009

12/561996

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
Suketu Naik - Kyoto, JP
Norman Liu - San Diego CA, US

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

H04B 1/26

455323, 455131, 455207, 455209, 455255, 327113, 327117, 331 2, 331 45, 331 53

A system includes at least a first array connected to a second array. The first array includes an odd number, greater than one, of unidirectionally-coupled non-linear first array elements. The second array includes an odd number, greater than one, of unidirectionally-coupled non-linear second array elements. The second array elements are unidirectionally-coupled in a direction opposite the coupling direction of the second array elements. The first array is configured to receive an input signal and down-convert the input signal. The second array is configured to receive the down-converted input signal, further down-convert the down-converted input signal, and output a down-converted output signal. The down-converted output signal is down-converted to a multiple of the frequency of the input signal proportional to the number of arrays of the system. The system may operate at frequencies greater than 1 GHz and may be contained in a microchip or on a printed circuit board.

8212569, Jul 3, 2012

Mar 29, 2010

12/749338

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

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

G01R 29/12
G01R 31/02

324457, 324 72

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.

8207763, Jun 26, 2012

Jun 29, 2010

12/826451

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

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

H03B 19/00

327117, 331 57, 331 55, 370343

A semiconductor non-linear channelizer device comprises an array of N first order, bi-stable semiconductor circuit cells. The circuit cells are uni-directionally coupled from a first circuit cell to another circuit cell, where N is an integer greater than 1. A signal input trace is coupled to each of the circuit cells and a signal output trace is coupled from each of the circuit cells.

7196590, Mar 27, 2007

Jun 18, 2004

10/874010

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

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

H03K 3/03

331 53, 331 2

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.

20150084704, Mar 26, 2015

Sep 26, 2013

14/037546

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

H03K 3/03

331 52

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.