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. 13, 2011
Filed:
Jan. 19, 2010
Yi-heng Liu, Taipei, TW;
Yi-Heng Liu, Taipei, TW;
Elite Semiconductor Memory Technology Inc., Hsinchu, TW;
Abstract
A temperature-compensated ring oscillator includes a control signal generator and a voltage controlled oscillator. The control signal generator is configured to generate at least one control signal, and includes at least one first resistor and second resistor. A first temperature coefficient of the first resistor is negative, and a second temperature coefficient of the second resistor is positive. The voltage controlled oscillator receives the control signal, outputs an oscillation signal, and has (2k+1) cascaded inverter units, where k≧1. Each of the inverter units includes a first transistor, a second transistor and an inverter. The first transistor has a drain coupled to a first supply voltage and a gate to receive the control signal. The second transistor has a source to receive a second supply voltage and a gate to receive the control signal. The inverter is coupled between the first and the second transistors.