Invention Grant
- Patent Title: Fully integrated DC offset compensation servo feedback loop
- Patent Title (中): 完全集成的直流偏移补偿伺服反馈回路
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Application No.: US13737915Application Date: 2013-01-09
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Publication No.: US09077585B2Publication Date: 2015-07-07
- Inventor: Hussain Alzaher
- Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS , KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY
- Applicant Address: SA Dhahran SA Riyadh
- Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS,KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY
- Current Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS,KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY
- Current Assignee Address: SA Dhahran SA Riyadh
- Agent Richard C. Litman
- Main IPC: H04B1/38
- IPC: H04B1/38 ; H04L25/06

Abstract:
The fully integrated DC offset compensation servo feedback loop is an integrator that measures the output signal DC component, and then feeds back and subtracts the measured DC component from the input signal. A larger integrator time constant lowers the high pass corner frequency, which must be very small in order to minimize the loss of the low frequency component of the desired signals. The large time constant is achieved on an integrated circuit by the use of a class-AB fully differential opamp in conjunction with an R-2R ladder as a circuit element to accomplish an integrated large time constant integrator. The R-2R ladder is configured as a digitally programmable resistor.
Public/Granted literature
- US20140192844A1 FULLY INTEGRATED DC OFFSET COMPENSATION SERVO FEEDBACK LOOP Public/Granted day:2014-07-10
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