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:
Oct. 27, 2015
Filed:
Sep. 29, 2014
Altera Corporation, San Jose, CA (US);
Wing Liu, Milpitas, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
One embodiment relates to an apparatus for regulating a voltage-controlled oscillator. The apparatus includes a digital-to-analog converter that has an input that receives a digital input signal and an output that outputs an analog control signal. A transistor receives the analog control signal so as to control an output voltage of the voltage-controlled oscillator. Control circuitry receives the output voltage and generates the digital input signal. Another embodiment relates to a method of regulating a voltage-controlled oscillator. A digital input signal is converted to an analog control signal using a digital-to-analog converter. The output voltage of the voltage-controlled oscillator is controlled using the analog control signal and monitored using a plurality of comparators. The digital input signal is changed depending on outputs of the plurality of comparators. Other embodiments, aspects, and features of the invention are also disclosed.