Inventor
Thayamkulangara R. Viswanathan
Inventor
Addison, TX, US
Overview
Patents· 30 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H03Mprimary
H03MCoding40%
H03KPulse technique9%
G01RMeasuring electric variables7%
G05FSystems for regulating electric or magnetic variables7%
G11BInformation storage based on relative movement between record carrier and transducer5%
H03FAmplifiers5%
H03HImpedance networks, e.g. resonant circuits5%
H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses5%
H04BTransmission5%
G06GAnalogue computers2%
PatentTitleYear
7,020,219'Wireless user terminal and system having high speed, high resolution, digital-to-analog converter with off-line sigma delta conversion and storage'20066,924,756'Method and system for processing a digital signal'20056,518,902'PC card and WLAN system having high speed, high resolution, digital-to analog converter with off-line sigma delta conversion and storage'20036,515,605'Base station having high speed, high resolution, digital-to-analog converter with off-line sigma delta conversion and storage'20036,489,908'Wireless local loop terminal and system having high speed, high resolution, digital-to-analog converter with off-line sigma-delta conversion and storage'20026,476,746'Cellular base station having a high speed, high resolution digital-to-analog converter with off-line sigma delta conversion and storage'20026,441,761'High speed, high resolution digital-to-analog converter with off-line sigma delta conversion and storage'20026,404,262'Switched capacitor integrator using unity gain buffers'20026,232,907'Polarity shifting flash A/D converter and method'20016,188,345'High speed delta-sigma A/D converter using a quantized USM negative feedback loop'20015,731,775'Subranging converter with plurality of resistor strings and transistor switches'19985,717,396'Analog-to-digital converter signal storage capacitor perturbation'19985,696,508'Comparator-offset compensating converter'19975,675,341'Current-mode parallel analog-to-digital converter'19975,627,496'PLL and phase detection circuit therefor'19975,619,203'Current source driven converter'19975,608,401'Three-level digital-to-analog converter for low-power consumption'19975,572,153'Low offset comparators based on current copiers'19965,534,862'Resistor string with equal resistance resistors'19965,532,628'Fast comparator circuit'19965,489,905'Merged decoding circuit for analog-to-digital flash conversion'19965,479,129'Variable propagation delay digital signal inverter'19955,016,012'Technique for compensating switched capacitor circuits having gain-setting resistors'19915,012,245'Integral switched capacitor FIR filter/digital-to-analog converter for sigma-delta encoded digital audio'19915,001,439'Very low distortion amplifier'19914,902,913'Analog comparator'19904,849,684'CMOS bandgap voltage reference apparatus and method'19894,818,929'Fully differential analog comparator'19894,577,119'Trimless bandgap reference voltage generator'19864,484,089'Switched-capacitor conductance-control of variable transconductance elements'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984–1991Patents assigned to AT & T BELL LAB (5)· patent assignee history
1989–1990Patents assigned to AMERICAN TELEPHONE & TELEGRAPH (3)· patent assignee history
1989–1991Based in Wyomissing, PA, US· patent location history
1989Based in Wyomissing Hills, PA, US· patent location history
1995–1996Patents assigned to AT & T CORP (5)· patent assignee history
1995–1997Based in Albany Township, Berks County, PA, US· patent location history
1996–2002Based in Addison, TX, US· patent location history
1997–1998Patents assigned to LUCENT TECHNOLOGIES INC (7)· patent assignee history
2001–2006Patents assigned to TEXAS INSTRUMENTS INC (10)· patent assignee history
2002–2006Based in Dallas, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| TEXAS INSTRUMENTS INC | 10 | 2001–2006 |
| LUCENT TECHNOLOGIES INC | 7 | 1997–1998 |
| AT & T BELL LAB | 5 | 1984–1991 |
| AT & T CORP | 5 | 1995–1996 |
| AMERICAN TELEPHONE & TELEGRAPH | 3 | 1989–1990 |
Locations
| Location | Patents | Span |
|---|---|---|
| Addison, Texas, US | 10 | 1996–2002 |
| Albany Township, Berks County, Pennsylvania, US | 7 | 1995–1997 |
| Dallas, Texas, US | 5 | 2002–2006 |
| Wyomissing, Pennsylvania, US | 5 | 1989–1991 |
| Wyomissing Hills, Pennsylvania, US | 1 | 1989 |