Shreyas Sen

US Patent:

20100245151, Sep 30, 2010

Filed:

Oct 20, 2009

Appl. No.:

12/582090

Inventors:

Harish S. Muthali - Austin TX, US
Shreyas Sen - Atlanta GA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G01S 7/36
H03F 3/04
G01R 19/00

US Classification:

342 19, 330288, 327 51

Abstract:

Techniques for detecting jammer signals in a received signal are described. In one aspect, high-speed current mirror resistive compensation circuits and output impedance boosting circuits are utilized to increase amplifier bandwidth in an improved wideband amplifier circuit. In another aspect, a dual transistor configuration including common source topology, averaging capacitors and a comparator circuit is utilized to improve the sensing of signal peaks in a peak detector block, which can be used together with the wideband amplifier circuit and a digital jammer detection circuit to detect jammer signals. The digital jammer detection circuit aids in the determination of the presence of jammer signals within the received signal, the determination of which may be variable due to programmability of the digital jammer detection circuit as described.

US Patent:

20190379414, Dec 12, 2019

Filed:

Mar 7, 2018

Appl. No.:

15/915029

Inventors:

- West Lafayette IN, US
Shreyas Sen - West Lafayette IN, US

International Classification:

H04B 1/12
H04B 13/00

Abstract:

A communication interference rejection system, comprising a dual data rate (DDR) receiver operatively connected to a device connected to a body of a user. The DDR receiver is configured to receive a signal transmitted through the body of the user, with the signal comprising a relatively substantially small constant amplitude component and a relatively large sinusoidal or modulated interference component, said interference component due to human body antenna effect. The receiver integrates the signal and sample at a sampling time, with the sampling time defined as T=n/F, wherein Fis the frequency of the modulated interference component and n is an integer.

US Patent:

20190347393, Nov 14, 2019

Filed:

May 14, 2019

Appl. No.:

16/412409

Inventors:

- West Lafayette IN, US
Shreyas Sen - West Lafayette IN, US

Assignee:

Purdue Research Foundation - West Lafayette IN

International Classification:

G06F 21/32
A61B 5/00

Abstract:

A communication interference rejection system comprising a relatively low-impedance voltage mode driver output which receives a signal from a sensor, the sensor near a user's skin, a receiver operatively connected to a device connected to a body of a user, wherein the receiver configured to receive a signal transmitted through the body of the user. The signal comprises a relatively substantially small constant amplitude component and a relatively large sinusoidal or modulated interference component, the interference component due to human body antenna effect, the receiver comprising a high-impedance termination to minimize channel loss, the receiver further configured to receive frequencies in the 10 KHz to 10 MHz range.

US Patent:

20150340814, Nov 26, 2015

Filed:

May 23, 2014

Appl. No.:

14/286445

Inventors:

JAMES E. JAUSSI - Hillsboro OR, US
BRYAN K. CASPER - Portland OR, US
SHREYAS SEN - Hillsboro OR, US
CHINTAN S. THAKKAR - Portland OR, US

International Classification:

H01R 13/6461
H01R 13/6586
H01R 13/627
H01R 13/652
H01R 13/62
H01R 43/20
H01R 13/6598

Abstract:

Techniques for forming high-bandwidth proximity connection between capacitively coupled plug and receptacle are described herein. A system for achieving capacitive coupling between contactless pads is described. The techniques include aligning and retaining the plug and receptacle in close proximity to one another. The techniques include cancelling crosstalk in the system based on the symmetry and orientation of differential pairs comprising signal pads. The techniques include enabling a high-bandwidth proximity transmission by filtering the transmission using a silicon buffer component.