FREQUENCY CALIBRATION FIXING DEVICE AND FREQUENCY CALIBRATION FIXING METHOD

• Main Authors: HONG GUOWEI, XIE QING-FENG, YAN SHUNYA
• Format: Patent
• Language: English
• Published: 22.12.2011
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES; BASIC ELECTRONIC CIRCUITRY; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRICITY; GENERATION OF NOISE BY SUCH CIRCUITS; GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

PROBLEM TO BE SOLVED: To provide a frequency calibration fixing device and a frequency calibration fixing method for generating a fixed frequency to output it by calibration-fixing an adjustable external oscillator.SOLUTION: A frequency calibration fixing device 20 comprises: a processing unit 24 for generating a frequency error value by comparing an oscillating frequency OSC with an accurate external clock signal ECLK, and generating a corresponding calibration signal CS based on the frequency error value; and a frequency adjustment unit 26 for generating a fixed voltage used to calibration-fix the oscillating frequency OSC to a prescribed frequency based on the calibration signal CS and the oscillating frequency OSC.