LexDanaLexDanabeta
Inventor

Navdeep S. Sooch

Inventor
Austin, TX, US

Overview

80→
Patents
1985–2009
Patent span
Electricity
Primary field (CPC H)

Patents· 80 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Mprimary
H04MTelephonic communication36%
H04LTransmission of digital information, e.g. telegraphic communication33%
Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information and communication technologies aiming at the reduction of their own energy use9%
H03MCoding8%
H04BTransmission5%
G05FSystems for regulating electric or magnetic variables2%
G06FElectric digital data processing1%
H03HImpedance networks, e.g. resonant circuits1%
H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses1%
H04JMultiplex communication1%
PatentTitleYear
7,515,672'Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with programmable current limiting'20097,463,675'Direct digital access arrangement circuitry and method for connecting to phone lines'20087,362,841'Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable DC termination impedance'20087,324,496'Highly integrated radio-frequency apparatus and associated methods'20087,301,995'Direct digital access arrangement circuitry and method for connecting to phone lines'20077,283,584'Direct digital access arrangement circuitry and method for connecting to phone lines'20077,254,230'Subscriber line interface circuitry'20077,203,224'Isolation system with digital communication across a capacitive barrier'20077,200,167'Direct digital access arrangement circuitry and method for connecting to phone lines'20077,190,785'Subscriber line interface circuitry'20077,180,999'Subscriber line interface circuitry'20077,154,940'Isolation system with digital communication across a capacitive barrier'20067,072,389'Direct digital access arrangement circuitry and method for connecting to phone lines'20067,050,509'Digital isolation system with hybrid circuit in ADC calibration loop'20067,046,755'Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable time constants'20067,046,793'Digital access arrangement circuitry and method having current ramping control of the hookswitch'20067,003,023'Digital isolation system with ADC offset calibration'20066,975,723'Architecture for minimum loop current during ringing and caller ID'20056,959,083'Loop current monitor circuitry and method for a communication system'20056,934,384'Subscriber line interface circuitry'20056,922,469'Separation of ring detection functions across isolation barrier for minimum power'20056,823,066'Digital access arrangement circuitry and method having current ramping control of the hookswitch'20046,754,341'External resistor and method to minimize power dissipation in DC holding circuitry for a communication system'20046,683,548'Analog isolation system with digital communication across a capacitive barrier'20046,654,409'Direct digital access arrangement circuitry and method for connecting DSL circuitry to phone lines'20036,611,553'Isolation system with digital communication across a capacitive barrier'20036,587,560'Low voltage circuits powered by the phone line'20036,570,513'Isolation system with digital communication across a capacitive barrier'20036,522,745'Digital access arrangement circuitry and method having a synthesized ringer impedance for connecting to phone lines'20036,516,024'Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with low distortion and current limiting'20036,504,864'Digital access arrangement circuitry and method for connecting to phone lines having a second order DC holding circuit'20036,498,825'Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with programmable current limiting'20026,480,602'Ring-detect interface circuitry and method for a communication system'20026,456,712'Separation of ring detection functions across isolation barrier for minimum power'20026,442,213'Digital isolation system with hybrid circuit in ADC calibration loop'20026,442,271'Digital isolation system with low power mode'20026,430,229'Capacitive isolation system with digital communication and power transfer'20026,408,034'Framed delta sigma data with unlikely delta sigma data patterns'20026,389,061'Isolation system with digital communication across a capacitive barrier'20026,389,134'Call progress monitor circuitry and method for a communication system'20026,385,235'Direct digital access arrangement circuitry and method for connecting to phone lines'20026,359,983'Digital isolation system with data scrambling'20026,330,330'External resistor and method to minimize power dissipation in DC holding circuitry for a communication system'20016,323,796'Digital isolation system with ADC offset calibration'20016,307,891'Method and apparatus for freezing a communication link during a disruptive event'20016,298,133'Telephone line interface architecture using ringer inputs for caller ID data'20016,297,755'Analog isolation system with digital communication across a capacitive barrier'20016,289,070'Digital isolation system with ADC offset calibration including coarse offset'20016,225,927'Analog isolation system with digital communication across a capacitive barrier'20016,222,922'Loop current monitor circuitry and method for a communication system'20016,201,865'Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable time constants'20016,198,816'Capacitively coupled ring detector with power provided across isolation barrier'20016,191,717'Analog isolation system with digital communication across a capactive barrier'20016,167,134'External resistor and method to minimize power dissipation in DC holding circuitry for a communication system'20006,167,132'Analog successive approximation (SAR) analog-to-digital converter (ADC)'20006,160,885'Caller ID circuit powered through hookswitch devices'20006,144,326'Digital isolation system with ADC offset calibration'20006,137,827'Isolation system with digital communication across a capacitive barrier'20006,107,948'Analog isolation system with digital communication across a capacitive barrier'20006,104,794'Architecture for minimum loop current during ringing and caller ID'20006,064,326'Analog-to-digital conversion overload detection and suppression'20005,870,046'Analog isolation system with digital communication across a capacitive barrier'19995,818,370'Integrated CODEC with a self-calibrating ADC and DAC'19985,767,722'Delta sigma switch capacitor filter using curent feed forward'19985,579,247'Method and apparatus for decreasing the interference and noise sensitivity of a ratiometric converter type of circuit'19965,258,758'DAC shutdown for low power supply condition'19935,248,970'Offset calibration of a DAC using a calibrated ADC'19935,245,344'High order switched-capacitor filter with DAC input'19935,196,850'Fourth order digital delta-sigma modulator'19935,150,386'Clock multiplier/jitter attenuator'19925,087,914'DC calibration system for a digital-to-analog converter'19925,079,550'Combining continuous time and discrete time signal processing in a delta-sigma modulator'19925,061,925'Phase equalization system for a digital-to-analog converter utilizing separate digital and analog sections'19914,851,841'Gain scaling of oversampled analog-to-digital converters'19894,805,198'Clock multiplier/jitter attenuator'19894,746,899'Method for reducing effects of electrical noise in an analog-to-digital converter'19884,595,874'Temperature insensitive CMOS precision current source'19864,588,941'Cascode CMOS bandgap reference'19864,583,037'High swing CMOS cascode current mirror'19864,550,284'MOS Cascode current mirror'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–1986Patents assigned to AT & T BELL LAB (4)· patent assignee history
1985–1986Based in Reading, PA, US· patent location history
1986Based in Emmaus, PA, US· patent location history
1988–1998Patents assigned to CRYSTAL SEMICONDUCTOR CORP (11)· patent assignee history
1988–2009Based in Austin, TX, US· patent location history
1993–1998Patents assigned to CRYSTAL SEMICONDUCTOR (3)· patent assignee history
1999–2009Patents assigned to SILICON LAB INC (60)· patent assignee history
2008Patents assigned to NXP BV (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SILICON LAB INC601999–2009
CRYSTAL SEMICONDUCTOR CORP111988–1998
AT & T BELL LAB41985–1986
CRYSTAL SEMICONDUCTOR31993–1998
NXP BV12008
Locations
LocationPatentsSpan
Austin, Texas, US761988–2009
Emmaus, Pennsylvania, US21986
Reading, Pennsylvania, US21985–1986