Surendra Babu Mandava from 22010 Villa Oaks Ln, Saratoga, CA 95070, age 66, Phone: (408) 867-2975

Portable Communications And Data Terminal Having Multiple Modes Of Operation

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US Patent:

6434395, Aug 13, 2002

Filed:

Dec 18, 1996

Appl. No.:

08/769036

Inventors:

Michael L. Lubin - Del Mar CA
Seton P. Kasmir - San Diego CA
Kathryn A. Kubasak - Carlsbad CA
Gregory A. Hein - Encinitas CA
Surendra B. Mandava - San Jose CA
Chanchai Poonpol - San Diego CA
Shahin Hedayat - San Ramon CA
Donald W. Burtis - Los Altos CA

Assignee:

Pacific Communications Sciences, Inc. - CA

International Classification:

H04Q 720

US Classification:

455466, 455553, 375216

Abstract:

A portable radio telephone handset includes the capability of operating as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation are available in the handset, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode. A paging function for incoming analog cellular communication is carried out on a CDPD channel. The handset distinguishes between paging signals identifying CDPD mode communications and paging signals identifying analog cellular communications. The handset automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration.

Dynamic Space, Frequency And Time Domain Coexistence

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US Patent:

20130196643, Aug 1, 2013

Filed:

Dec 17, 2012

Appl. No.:

13/717133

Inventors:

Florin Baboescu - San Diego CA, US
Mark Gonikberg - Los Altos Hills CA, US
Surendra Babu Mandava - Saratoga CA, US
Asish M R - Bangalore, IN
Payel Banerjee - Kolkata, IN
Kashiviswanath N - Dist Medak, IN
Sanjay Saha - Bangalore, IN
Sachin Gupta - BANGALORE, IN
Neeraj Poojary - Santa Clara CA, US
Yury Gonikberg - San Jose CA, US
Matthew Fischer - Mountain View CA, US
Steven Hall - Olivenhain CA, US
Knut Odman - Encinitas CA, US
Prasanna Desai - Elfin Forest CA, US
Shawn Ding - San Diego CA, US
Suryakant Maharana - Bangalore, IN
Bijoy Bhukania - Bangalore, IN

Assignee:

BROADCOM CORPORATION - Irvine CA

International Classification:

H04B 15/00

US Classification:

455418, 4555501

Abstract:

Various methods and systems are provided for space, frequency and time domain coexistence of RF signals. In one example, among others, a communication device includes a coexistence manager capable of monitoring operating conditions of a cellular modem and a coexistence assistant capable of monitoring operating conditions of a wireless connectivity unit. The coexistence manager is capable of modifying operation of the modem and/or unit based on an operating condition change. In another example, a method includes detecting a change in antenna isolation and/or operating temperature of a FE filter, determining filtering characteristics of the FE filter based at least in part upon the change, and modifying communications of coexisting communication protocols based at least in part upon the filtering characteristics. In another example, a TX/RX configuration for coexisting communication protocols is determined and communications in a protocol is modified based at least in part upon the TX/RX configuration.

Multiprocessor System For Digital Signal Processing

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US Patent:

63276488, Dec 4, 2001

Filed:

May 7, 1997

Appl. No.:

8/852842

Inventors:

Shahin Hedayat - San Ramon CA
Surendra Mandava - San Jose CA

Assignee:

Cirrus Logic, Inc. - Austin TX

International Classification:

G06F 900

US Classification:

712 35

Abstract:

A novel multi-DSP system allows a main DSP to operate concurrently with an auxiliary DSP for implementing a filter algorithm. The main DSP and auxiliary DSP have separate program memories but share the same data memory. The auxiliary DSP program memory is mapped to the main DSP program memory to allow the main DSP to download filter process instructions from its program memory into the auxiliary DSP program memory. The auxiliary DSP fetches the instructions from its program memory to execute them. The auxiliary DSP is prevented from access to the shared data its program memory when this memory is occupied by the main DSP. An arbitration mechanism gives the auxiliary DSP access to the data memory only when the main DSP is not using this memory.

Selective Shadowing Of Registers For Interrupt Processing

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US Patent:

56425163, Jun 24, 1997

Filed:

Oct 14, 1994

Appl. No.:

8/324077

Inventors:

Shahin Hedayat - San Ramon CA
Surendra Mandava - San Jose CA

Assignee:

Cirrus Logic, Inc. - Fremont CA

International Classification:

G06F 1332
G06F 1324

US Classification:

395733

Abstract:

Interrupts are prioritized such that selected interrupts use shadow registers to save the current state of the machine, whereas other interrupts use a software implemented interrupt service routine (ISR) to save and restore the current machine state. Hence, the number of nested interrupts that can be serviced will not be limited to the depth of register shadowing.

Adsl Integrated Line Card With Digital Splitter And Pots Codec Without Bulky Analog Splitter

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US Patent:

58898565, Mar 30, 1999

Filed:

May 22, 1997

Appl. No.:

8/862127

Inventors:

Anthony J. P. O'Toole - San Jose CA
Shahin Hedayat - San Ramon CA
Surendra Babu Mandava - San Jose CA

Assignee:

Centillium Technology Corp. - Fremont CA

International Classification:

H04M 900
H04J 312

US Classification:

379399

Abstract:

An integrated line-card terminates an asymmetric digital-subscriber line (ADSL) copper-pair at a single point in a central office. The line card contains analog line circuitry such as a ring generator, off-hook detector, D. C. current feed, and a single analog-digital (A/D) converter. The phone line carries a composite signal of both the high-frequency ADSL data and the low-frequency voice or plain-old-telephone-service (POTS) signal. Instead of using an analog frequency-splitter with bulky, expensive inductor coils, a digital splitter is used. A digital-signal processor (DSP) can be used to perform the digital splitting of ADSL and POTS. The waveforms from the analog phone line are first converted to digital values by the A/D converter, and then a digital splitter separates the low-frequency POTS from the high-frequency ADSL. The ADSL data is formatted by the DSP for a data pathway to the Internet, while the POTS data is converted by the DSP to A-Law or C-Law for transmission over the telephone network's PCM highway. The DSP can perform all decoding, encoding, compression, and formatting needed by both ADSL and POTS.

Dynamic Space, Frequency And Time Domain Coexistence

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US Patent:

20180054820, Feb 22, 2018

Filed:

Oct 17, 2017

Appl. No.:

15/786529

Inventors:

- Singapore, SG
Florin BABOESCU - San Diego CA, US
Mark GONIKBERG - Sunnyvale CA, US
Surendra Babu MANDAVA - Saratoga CA, US
Asish Makkattil RATNAN - Bangalore, IN
Payel BANERJEE - Kolkata, IN
Nethi Kashi VISWANATH - Dist Medak, IN
Sanjay SAHA - Bangalore, IN
Sachin GUPTA - Bangalore, IN
Neeraj POOJARY - Santa Clara CA, US
Yury GONIKBERG - San Jose CA, US
Sudhirkumar PRAJAPATI - Bangalore, IN
Steven HALL - Olivenhain CA, US
Knut Terje Hermod ODMAN - Encinitas CA, US
Prasanna DESAI - Elfin Forest CA, US
Shawn DING - San Diego CA, US
Suryakant MAHARANA - Bangalore, IN
Bijoy BHUKANIA - Bangalore, IN

International Classification:

H04W 72/04
H04W 16/04
H04W 52/02
H04B 15/00
H04W 74/04
H04W 72/12
H04W 16/14
H04W 88/04

Abstract:

Various methods and systems are provided for space, frequency and time domain coexistence of RF signals. In one example, among others, a communication device includes a coexistence manager capable of monitoring operating conditions of a cellular modem and a coexistence assistant capable of monitoring operating conditions of a wireless connectivity unit. The coexistence manager is capable of modifying operation of the modem and/or unit based on an operating condition change. In another example, a method includes detecting a change in antenna isolation and/or operating temperature of a FE filter, determining filtering characteristics of the FE filter based at least in part upon the change, and modifying communications of coexisting communication protocols based at least in part upon the filtering characteristics. In another example, a TX/RX configuration for coexisting communication protocols is determined and communications in a protocol is modified based at least in part upon the TX/RX configuration.

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Portable Communications And Data Terminal Having Multiple Modes Of Operation

Dynamic Space, Frequency And Time Domain Coexistence

Multiprocessor System For Digital Signal Processing

Selective Shadowing Of Registers For Interrupt Processing

Adsl Integrated Line Card With Digital Splitter And Pots Codec Without Bulky Analog Splitter

Dynamic Space, Frequency And Time Domain Coexistence

Surendra Mandava

Surendra Mandava

Surendra Mandava s