Digital self-aware charge pump calibration technique for frequency synthesizers

QC 20141001
As radio design complexity increases and features sizes decrease, more innovative solutions are explored to ensure analog circuit designs meet specifications. Digital calibration is an inexpensive and effective solution. A novel digital calibration technique to improve charge pump current mismatch in frequency synthesizers is presented. This method detect. The charge pump error by measurin. The low pass filter voltage oy the system forced to operate at a fixed phase error. A reference table developed from a mathematical model oy the system use. The measurement result to produce a digital control word. The digital control word acts on a charge pump array to correc. The error. The technique is implemented and tested in Matlab/Simulink for a case study frequency synthesizer. The calibration technique correct. The charge pump current absolute error to within 1.4% oy the nominal value. Additionally. The technique is exceptionally effective for correctin. The charge pump current mismatch to within 1%.

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering hsv//eng
Absolute error
Analog Circuit Design
Calibration techniques
Charge pump
Charge pump currents
Digital calibrations
Digital control
Effective solution
Innovative solutions
MATLAB /simulink
Measurement results
Phase error
Radio design
System use
Calibration
Digital control systems
Frequency synthesizers
Integrated circuit manufacture
Low pass filters
Mathematical models
Pumps

Ismail, M. (författare)
Atallah, Jad G.KTH,Elektronik- och datorsystem, ECS(Swepub:kth)u1ki5tx5 (författare)
KTHElektronik- och datorsystem, ECS (creator_code:org_t)

Ingår i:2009 16th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2009: IEEE, s. 743-7469781424450916

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