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:
Apr. 18, 2006
Filed:
Jul. 22, 2004
Masaki Yoshino, Kanagawa, JP;
Masaki Yoshino, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
An oscillator circuit includes a crystal oscillating circuit for generating a clock signal using a crystal resonator, an RC oscillating circuit for generating the clock signal using an RC circuit, a control signal generation circuit for bringing one of terminals for the external component to a ground potential in response to input of a reset signal, changeover switches for connecting the crystal oscillating circuit to the crystal resonator in parallel upon receipt of a first signal and connecting the RC oscillating circuit to a resistive element in the RC circuit in response to a second signal, and a selection signal generation circuit connected to the other terminal of the external component upon receipt of the reset signal, for transmitting the first signal to the changeover switches when a current flowing through the external component is smaller than a predetermined value and transmitting the second signal to the changeover switches when the current is equal to or more than the predetermined value.