Crystal oscillating device and electronic equipment using the device
A technology of crystal oscillation and crystal oscillator, which is applied in the directions of power oscillators, printed circuits assembled with electrical components, printed circuits connected with non-printed electrical components, etc. The effect of reducing size and cost
Inactive Publication Date: 2004-08-04
MURATA MFG CO LTD
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- Application Information
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Problems solved by technology
[0009] In Japanese Unexamined Patent Application Publication JP-2002-64333, since only the cylindrical member supports the crystal oscillator, the strength is insufficient
When the strength of the crystal oscillator is increased by integrating the case of the crystal oscillator with the cylindrical member to form the cylindrical member, the cost of the case increases
Method used
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[0025] figure 1 Shown is an exploded perspective view of the crystal oscillator device of the first preferred embodiment, Figure 2A with 2B Shown is a side view of the crystal oscillator unit, while Figure 3A with 3B The sectional view and the bottom view of the crystal oscillation device are respectively. refer to figure 1 , 2A and 2B, the structure of the crystal oscillation device 20 is preferably that the packaged oscillator 2 is mounted on a planar thin circuit board 1 .
[0026] Circuit elements such as a transistor 5 a , a varactor diode 5 b , a chip capacitor 6 a and a thermistor 6 b are mounted on the circuit board 1 . The transistor 5a and the varactor diode 5b are preferably components of molded resin having substantially the same height and having a flat upper surface. It is also preferable to form printed resistors 4 as circuit elements on the circuit board 1 . Some printed resistors 4 are located under the transistor 5a and the varactor 5b. These circu...
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A crystal oscillation device includes a crystal oscillator including a package with first connecting electrodes provided on a flat bottom surface mounted on a flat, thin circuit board. Circuit components and second connecting electrodes provided in one-to-one correspondence with the first connecting electrodes are mounted on one principal surface of the circuit board. The crystal oscillator is supported by top surfaces of a transistor and a varicap diode that are the highest among the circuit components mounted on the circuit board. The crystal oscillator and the circuit board are electrically connected with solder provided between the first and second connecting electrodes. The solder also attracts the crystal oscillator toward the circuit board.
Description
technical field [0001] The present invention relates to a crystal oscillation device and electronic equipment, specifically, to a crystal oscillation device used as a reference signal source of a PLL (Phase Locked Loop) circuit included in an RF (Radio Frequency) circuit of a cellular phone, for example, and a An electronic device including the crystal oscillator. Background technique [0002] In a crystal oscillator device conventionally used as a reference signal source, a crystal oscillator is used as a resonator, and the crystal oscillator is combined with circuit elements that determine an oscillation circuit, a temperature compensation circuit, and other appropriate elements. Typically, conventional crystal oscillators are constructed by hermetically mounting a crystal strip with electrodes within a package made of ceramic or other suitable material. These circuit components need to be mounted on a circuit board made of ceramic or other suitable material. By combinin...
Claims
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IPC IPC(8): H03B5/32H05K1/18H05K3/30H05K3/34
CPCH05K2201/2036H05K1/181H05K3/3442H05K3/303H05K2201/10075H05K2201/10727H05K2201/10174H05K2201/10515H05K2201/10166Y02P70/50
Inventor 竹村忠冶奥村祥
Owner MURATA MFG CO LTD