Patent ID: 8941444
Filing Date: 2015-01-27
Classification: H03B,H03L

Abstract:
1. A crystal oscillator, comprising: a crystal unit; and an IC chip that integrates at least an oscillator circuit using said crystal unit, said crystal unit and said oscillator circuit being housed in a container, wherein said IC chip includes: a plurality of output buffers that amplify an output from said oscillator circuit and output the amplified output to outside; a pair of crystal connecting terminals that are used for electrical connection between said oscillator circuit and said crystal unit; and output terminals provided for said respective output buffers, signals of an oscillation frequency component appear at said pair of crystal connecting terminals with phases opposite to each other, each of said plurality of output buffers independently includes an inverting or non-inverting amplifier, at least one of said plurality of output buffers is an output buffer whose output is on/off controllable according to an enable signal, and said container is configured such that, for each on/off controllable output buffer, wiring is made such that a capacitance between said crystal connecting terminal having a phase opposite to that of the output of said each on/off controllable output buffer and an output terminal of said each on/off controllable output buffer is smaller than a capacitance between the output terminal of said each on/off controllable output buffer and the other crystal connecting terminal.