Title:
SURFACE-MOUNTING TWO-FREQUENCY SWITCHING CRYSTAL OSCILLATOR
Document Type and Number:
Japanese Patent JP3833485
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a surface-mounting oscillator which can maintain turning into compact size and capable of being switched from one frequency to another by the use of a programmable IC chip.
SOLUTION: A crystal piece and an IC chip are housed in a surface-mounting case, equipped with mounting electrodes for the formation of a surface-mounting crystal oscillator. An oscillation circuit formed of the IC chip and the crystal piece, a PLL circuit, equipped with a voltage-controlled oscillation circuit operating on the oscillation frequency of the oscillation circuit as a reference circuit, and a first and a second storage circuit, which set the output frequency of the PLL circuit at fo1 or fo2 are integrated onto the IC chip. The first and second storage circuits are selected by keeping one of the mounting electrodes at ground potential or non-ground potential, and the output frequency fo1 or fo2 by the first or the second selected storage circuit is supplied.
Inventors:
Toshikatsu Tabata
Hisashi Omata
Gen Canton
Hisashi Omata
Gen Canton
Application Number:
JP2001072035A
Publication Date:
October 11, 2006
Filing Date:
March 14, 2001
Export Citation:
Assignee:
Nippon Denpa Industry Co., Ltd.
International Classes:
H03B5/32; H03L7/183; H03L7/08; (IPC1-7): H03L7/183; H03B5/32; H03L7/08
Domestic Patent References:
| JP8008740A | ||||
| JP11330859A |