Title:
FREQUENCY VARIABLE OSCILLATOR
Document Type and Number:
Japanese Patent JP2006287681
Kind Code:
A
Abstract:
To increase the capacitance of a variable capacitance element for use in a frequency variable oscillator while suppressing an increase in a mounting area.
The frequency variable oscillator is provided with a semiconductor chip 11 with a feedback circuit B11 formed therein, a SAW vibrator W11 and a variable capacitance capacitor C11 are layered on the semiconductor chip 11, and a thin film piezoelectric substance layer 14 constituting the SAW vibrator W11 is used to form the variable capacitance capacitor C11.
Inventors:
GOTO KENJI
Application Number:
JP2005105955A
Publication Date:
October 19, 2006
Filing Date:
April 01, 2005
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
H03B5/30; H01G4/33; H01G7/06; H01L21/822; H01L27/04
Attorney, Agent or Firm:
Tetsuya Mori
Yoshiaki Naito
Cui Shu Tetsu
Yoshiaki Naito
Cui Shu Tetsu