Patent ID: 8299864
Filing Date: 2012-10-30
Classification: H03L

Abstract:
1. A voltage controlled temperature compensated crystal oscillator in which an IC chip and a crystal blank are accommodated in a chamber body, and at the very least, the crystal blank is hermetically sealed, and mounting terminals that are electrically connected to said IC chip, are provided on an outside bottom surface of said chamber body, which is made rectangular in plan view, said IC chip has basic functions consisting of a first oscillator output function, wherein a voltage variable capacitative element to which a control voltage is applied is inserted within an oscillator closed loop, and a temperature compensating function that at the very least has a temperature sensor and compensates for the frequency temperature characteristics arising in the crystal blank, and additional functions other than said basic functions, comprising of a second oscillator output function, an operation/non-operation function of the first oscillator output, and a temperature voltage output function, and one principal surface that serves as a circuit formation surface of said IC chip has IC terminals, and said IC terminals comprise, at the very least, basic IC terminals composed of a pair of crystal terminals, a power terminal, a first oscillator output terminal, a control voltage input terminal, and an earth terminal, which correspond to said basic functions, and two additional IC terminals that correspond to said additional functions, and said mounting terminals have; basic mounting terminals that are electrically connected to said basic IC terminals excluding a pair of crystal terminals, namely a power terminal, a first oscillator output terminal, a control voltage input terminal, and an earth terminal, and additional mounting terminals that are electrically connected such that they correspond to said additional functions, wherein the two additional IC terminals correspond to two functions selected from among: i) a second oscillator output function, ii) an operation/non-operation function of a first oscillator output, and iii) a temperature voltage output function, which are selectively connected according to changes in a circuit pattern of a surface layer of said circuit formation surface, and said basic mounting terminals are provided on four corner portions of an outside bottom surface of said chamber body, and the two additional mounting terminals that are connected to the two additional IC terminals are provided on a central portion of a long side facing said outside bottom surface.