The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 2020
Filed:
Nov. 09, 2018
Applicant:
Microchip Technology Incorporated, Chandler, AZ (US);
Inventors:
Ajay Kumar, Phoenix, AZ (US);
James E. Bartling, Chandler, AZ (US);
Assignee:
MICROCHIP TECHNOLOGY INCORPORATED, Chandler, AZ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 23/02 (2006.01); H02J 7/00 (2006.01); H02J 7/34 (2006.01); G01R 23/12 (2006.01);
U.S. Cl.
CPC ...
G01R 23/02 (2013.01); H02J 7/0068 (2013.01); G01R 23/12 (2013.01); H02J 7/345 (2013.01);
Abstract
An apparatus includes a capacitor, a reference voltage, an input signal to be measured, and a frequency calculation circuit. The frequency calculation circuit is configured to select a capacitance value for the capacitor, charge the capacitor with the reference voltage, discharge the capacitor to a threshold voltage, and, based on a comparison of time to discharge the capacitor to the threshold voltage with a clock cycle of the input signal, determine a frequency of the input signal.