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:
Mar. 03, 2015
Filed:
May. 01, 2014
Realtek Semiconductor Corp., HsinChu, TW;
Tsung-Yen Tsai, Hsinchu County, TW;
Realtek Semiconductor Corp., Science Park, HsinChu, TW;
Abstract
A frequency detection apparatus includes: a constant current generator, arranged for providing a constant current to a voltage output terminal; a first capacitor, coupled between the voltage output terminal and a first reference voltage; a first transistor, which has a first connection terminal coupled to the voltage output terminal, a control terminal coupled to an input signal; a second connection terminal, coupled between the second connection terminal of the first transistor and the first reference voltage; a second transistor, which has a first connection terminal coupled to the second connection terminal of the first transistor, a second connection terminal coupled to the first reference voltage, a control terminal coupled to an inverted input signal, which is obtained by inverting the input signal; wherein a voltage output of the voltage output terminal changes with an input signal frequency of the input signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile