DF

Douglas R. Frey

SL Silicon Laboratories: 7 patents #138 of 744Top 20%
AD Analog Devices: 3 patents #564 of 1,943Top 30%
AT AT&T: 1 patents #10,626 of 18,772Top 60%
📍 Bethlehem, PA: #53 of 1,038 inventorsTop 6%
🗺 Pennsylvania: #3,862 of 74,527 inventorsTop 6%
Overall (All Time): #257,533 of 4,157,543Top 7%
18
Patents All Time

Issued Patents All Time

Showing 1–18 of 18 patents

Patent #TitleCo-InventorsDate
9143373 Transport of an analog signal across an isolation barrier Jeffrey L. Sonntag, Michael J. Mills, András V. Horváth, Anantha Nag Nemmani 2015-09-22
7688119 Power supply with digital control loop Geoffrey Thompson, Siddharth Sundar, Russell J. Apfel, Marius Goldenberg, Ion C. Tesu +2 more 2010-03-30
7548123 Dividerless PLL architecture 2009-06-16
7269254 Integrated driver circuitry 2007-09-11
6909390 Digital-to-analog converter switching circuitry Ramin Khoini-Poorfard 2005-06-21
6747522 Digitally controlled crystal oscillator with integrated coarse and fine control David Pietruszynski 2004-06-08
6639534 Digital-to-analog converter switching circuitry Ramin Khoini-Poorfard 2003-10-28
5631968 Signal conditioning circuit for compressing audio signals Patrick Copley 1997-05-20
5585757 Explicit log domain root-mean-square detector 1996-12-17
5528197 Voltage controlled amplifier 1996-06-18
5270635 Universal battery charger Philip K. Hoffman 1993-12-14
5266881 Universal high current battery charger Philip K. Hoffman 1993-11-30
5212457 Input buffer with reduced offset for operational amplifiers or the like John Pierdomenico 1993-05-18
5113127 Universal battery charger Philip K. Hoffman 1992-05-12
4823093 Dynamically biased voltage controlled element 1989-04-18
4560947 Monolithic voltage controlled element 1985-12-24
4495640 Adjustable distortion guitar amplifier 1985-01-22
4471320 Voltage controlled element 1984-09-11