Abstract: A high order filter circuit is integrated by a plurality of the low order filter circuits. Before correcting the high order filter circuit, switch units may restore the high order filter circuit to the low order filter circuits for correction, and then combine the corrected low order filter circuits to form the original high order filter circuit.
Type:
Grant
Filed:
September 5, 2018
Date of Patent:
July 2, 2019
Assignees:
NUVOTON TECHNOLOGY CORP., NCKU RESEARCH & DEVELOPMENT FOUNDATION
Abstract: A low order filter circuit having a frequency correction function, a frequency correction method for a low order filter circuit, and a high order filter circuit are provided. An analog to digital converter (ADC) may detect a peak of a signal processed by a second order filter unit, and after comparison and determination are performed by a digital correction unit, a frequency control signal is outputted as a feedback to a notch filter or a band-pass filter in the second order filter unit where frequency adjustment is performed. The high order filter circuit is integrated by a plurality of the low order filter circuits. Before correcting the high order filter circuit, switch units may restore the high order filter circuit to the low order filter circuits for correction, and then combine the corrected low order filter circuits to form the original high order filter circuit.
Type:
Grant
Filed:
June 20, 2017
Date of Patent:
October 9, 2018
Assignees:
NUVOTON TECHNOLOGY CORP., NCKU RESEARCH & DEVELOPMENT FOUNDATION
Abstract: A processor having a core configured to control a keyboard and a plurality of pins connected to the core, configured to transfer signals from the processor to the keyboard. A controller is configured to transfer signals from one or more registers through at least one of the pins, intermittently with signals transferred to the keyboard.
Type:
Grant
Filed:
July 8, 2008
Date of Patent:
August 23, 2011
Assignee:
Nuvoton Technology Corp.
Inventors:
Victor Flachs, Nir Tasher, Nimrod Peled, Leonid Shamis, Shani Mayer