Patent Number: 7,821,348

Title: Crystal oscillator for surface mounting

Abstract: A crystal oscillator includes an oscillator circuit, a main body, a first switching circuit, a second switching circuit, and a voltage detecting circuit. The oscillator circuit includes an IC chip including an output circuit and a function circuit. The crystal element includes a first excitation electrode and a second excitation electrode. The main body houses the oscillator circuit and the crystal element and includes a power supply terminal, a ground terminal, an output terminal, and a function terminal. The output terminal is electrically connected to the output circuit and the first excitation electrode via the first switching circuit. The function terminal is electrically connected to the function circuit and the second excitation electrode via the second switching circuit. The first switching circuit and the second switching circuit are operated on the basis of a switching signal from the voltage detecting circuit connected to the power supply terminal.

Inventors: Ishimaru; Chisato (Saitama, JP), Makuta; Toshikatsu (Saitama, JP)

Assignee: Nihon Dempa Kogyo Co., Ltd.

International Classification: H03B 5/32 (20060101)

Expiration Date: 2018-10-26 0:00:00