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:
Sep. 07, 2004
Filed:
Sep. 23, 2002
Masayuki Takahashi, Nasu-gun, JP;
Toru Matsumoto, Nasu-gun, JP;
Nippon Precision Circuits Inc., Tokyo, JP;
Abstract
A temperature compensated oscillator keeping the area of a capacitor array and the bit number of a memory from increasing and allowing for high precision is provided. A adjusting method of such a resonator and an integrated circuit for temperature compensated oscillation are also provided. A capacitor array and a variable capacitance diode are connected and used as a load capacitance in an oscillation circuit, and the capacitance value of the former is digital-controlled and that of the latter is analog-controlled, so that the amount of compensation data necessary for the digital control is reduced and highly precise temperature compensation is permitted.