Prasad K Panchalan

US Patent:

20130257598, Oct 3, 2013

Filed:

Mar 28, 2013

Appl. No.:

13/852961

Inventors:

Edward M. Farrell - Saratoga CA, US
Prasad Panchalan - San Jose CA, US
Manu H. R. Rao - Fremont CA, US

Assignee:

Intelleflex Corporation - Santa Clara CA

International Classification:

G06K 7/10

US Classification:

340 102

Abstract:

One embodiment of the present invention includes a Radio Frequency Identification (RFID) reader configured to detect radio frequency (RF) interference in and/or outside a band of RFID operation. The RFID reader includes a receive channel for receiving incoming RF signals; and hardware for detecting interference in and/or outside a band of RFID operation. A method for mitigating radio frequency (RF) interference in and/or outside a band of RFID operation, according to one embodiment, includes detecting interference in and/or outside a band of RFID operation; and controlling an aspect of operation of the RFID reader for mitigating the detected interference.

US Patent:

20110304440, Dec 15, 2011

Filed:

Jun 11, 2010

Appl. No.:

12/814108

Inventors:

Prasad Panchalan - San Jose CA, US

International Classification:

H04Q 5/22
H03D 1/04

US Classification:

340 103, 375346

Abstract:

In one embodiment, a RFID reader circuit includes a master clock for providing a timing signal on a timing signal output thereof, a switching regulator synchronized with the timing signal for providing power to the RFID reader circuit, a Radio Frequency (RF) source in a transmitting path, the RF source being coupled to the timing signal output, and an analog-to-digital converter (ADC) in a receiving path, the ADC being coupled to the timing signal output. This circuit may also be included in an RFID system having a reader and a plurality of RFID tags, in one approach. According to another general embodiment, a method for mitigating noise in a RFID reader circuit includes providing a common timing signal or derivatives thereof from a master clock to each component in a RFID reader circuit and to a power supply. Other systems and methods are also shown, according to various embodiments.

US Patent:

20110304431, Dec 15, 2011

Filed:

Jun 11, 2010

Appl. No.:

12/814072

Inventors:

Edward M. Farrell - Saratoga CA, US
Prasad Panchalan - San Jose CA, US

International Classification:

H04Q 5/22

US Classification:

340 101

Abstract:

In one embodiment, a Radio Frequency Identification (RFID) reader circuit includes a Radio Frequency (RF) source, a RF power amplifier coupled to an output of the RF source in a transmitting path, a first RF bandpass filter coupled between the output of the RF source and a mixer module, and a low noise amplifier in a receiving path being coupled to an input of a second RF bandpass filter. The mixer module receives a signal from the first RF bandpass filter and a signal from the second RF bandpass filter, the mixer module multiplies the signal from the first RF bandpass filter with the signal from the second RF bandpass filter to recover the backscatter sidebands in the signal from the second RF bandpass filter, and the first and second RF bandpass filters provide identical or nearly identical delay of signals. Other systems, methods and circuits are also described.

US Patent:

20110304439, Dec 15, 2011

Filed:

Jun 11, 2010

Appl. No.:

12/814053

Inventors:

Prasad Panchalan - San Jose CA, US
Manu H. R. Rao - San Jose CA, US
Edward M. Farrell - Saratoga CA, US

International Classification:

H04Q 5/22

US Classification:

340 103

Abstract:

In one embodiment, a RFID reader circuit includes a RF power amplifier coupled to a coupler; an amplitude and phase adjustor module coupled to an output of the coupler; a signal combiner module coupled to an output of the amplitude and phase adjustor module; and a low noise amplifier coupled to an output of the signal combiner module. In another embodiment, a RFID system includes a plurality of RFID tags; and at least one RFID reader, the at least one RFID reader comprising a RFID reader circuit, the circuit comprising: a RF power amplifier coupled to a coupler; an amplitude and phase adjustor module coupled to an output of the coupler; a signal combiner module coupled to an output of the amplitude and phase adjustor module; and a low noise amplifier coupled to an output of the signal combiner module. Other systems, methods, and circuits are described as well.

US Patent:

20110304432, Dec 15, 2011

Filed:

Jun 11, 2010

Appl. No.:

12/814095

Inventors:

Prasad Panchalan - San Jose CA, US
Edward M. Farrell - Saratoga CA, US

International Classification:

H04Q 5/22

US Classification:

340 101

Abstract:

In one embodiment, a RFID reader circuit includes a RF source input in a transmitting path, a RF modulator in parallel with a bypass, the RF modulator and the bypass being selectively coupled to the RF source input, at least one switch for selectively coupling an output of the RF modulator to the transmitting path, and a RF power amplifier in the transmitting path. In another embodiment, a RFID system includes a plurality of RFID tags, and a RFID reader, the RFID reader comprising a RFID reader circuit. The circuit includes a RF source input in a transmitting path, a RF modulator in parallel with a bypass, the RF modulator and the bypass being selectively coupled to the RF source input, at least one switch for selectively coupling an output of the RF modulator to the transmitting path, and a RF power amplifier in the transmitting path.

US Patent:

20210346617, Nov 11, 2021

Filed:

Aug 16, 2019

Appl. No.:

17/268593

Inventors:

- Venice CA, US
Robert Steven Walter Bates - Venice CA, US
Sidney Primas - Thousand Oaks CA, US
Yisroel Kirsh - Venice CA, US
Jeroen Arnold Norbert Kools - Campell CA, US
Andrew James Weitz - Bishop CA, US
Prasad K Panchalan - San Jose CA, US

International Classification:

A61M 11/04
A24F 40/53
A24F 40/57
A24F 40/65
A24F 40/42
A24F 40/10
A24F 40/20
A24F 40/51
G16H 20/13
G16H 40/67

Abstract:

The present disclosure includes a method for vaporizing a product of a plurality of different products including receiving, by a processor of a vaporizing device, a desired dosage amount that is indicative of an amount of a compound to release during one or more inhalation events. The method includes determining, by the processor, an occurrence of a current inhalation event and during the current inhalation event determining, by the processor, an inhalation pressure being applied to a container that contains the product; determining, by the processor, a predicted dosage that is indicative of a predicted amount of the compound that has been released in the vapor during the current inhalation event based on the inhalation pressure; and selectively adjusting, by the processor, a vaporizing temperature being applied to the product by the vaporizer based on the desired dosage and the predicted dosage.

US Patent:

20210307301, Oct 7, 2021

Filed:

Mar 18, 2021

Appl. No.:

17/205843

Inventors:

- Mountain View CA, US
Prasad Panchalan - San Jose CA, US
Alberto Vidal - San Jose CA, US
Devin Spratt - Los Gatos CA, US
Jack Hidary - Tarrytown CA, US

International Classification:

A01K 47/06
A01K 47/02
H04B 5/00
G06N 20/00
G01K 13/00
G01K 3/14

Abstract:

A system for monitoring a beehive includes a sensor bar. The sensor bar has a physical size and shape to function as a frame bar of a honeybee frame that slides into a chamber of a beehive. The sensor bar includes an enclosure having a plurality of holes, a microphone disposed within the enclosure to record sound emanating through the holes from the beehive, and at least one interior environmental sensor disposed within the enclosure to measure an interior environmental characteristic of the beehive.

US Patent:

20210248330, Aug 12, 2021

Filed:

Apr 29, 2021

Appl. No.:

17/244314

Inventors:

- Campbell CA, US
Alberto Vidal - San Jose CA, US
Edward John Boling - Fremont CA, US
Prasad Panchalan - San Jose CA, US
Edward Maurice Farrell - Saratoga CA, US

Assignee:

CULVERT-IOT CORPORATION - Campbell CA

International Classification:

G06K 7/10
G06N 20/00
H04L 29/06
G06F 21/60
H04W 12/037
H04W 12/03
G06F 21/74
G06K 9/62
G06K 19/07
H04B 7/0413
H04L 9/32
G06K 9/00
H04L 9/08
H04W 4/029
G01K 3/00
H04W 4/80
G01K 7/22
H04W 4/14
H04W 8/18
H04W 12/06
G06Q 50/28

Abstract:

An intelligent tracking system generally includes one or more tracking devices, some of which may be passive tracking devices. Each passive tracking device includes one or more transceivers and is energized by an energizing signal. Some of these passive tracking devices may operate in a first communication mode or a second communication mode based on the energizing signal. Some tracking devices may include encryption modules or authentication modules. Some of these devices may incorporate a bulk acoustic wave oscillator.