Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CAPACITANCE TRIMMING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2015/098893
Kind Code:
A1
Abstract:
 A capacitance trimming circuit (7) is provided with: a capacitance trimming unit (5); and a capacitance voltage division generating unit (6) which, when the electrostatic capacitance is to be adjusted by the capacitance trimming unit (5), applies a reference voltage (Vc) to one end of a first feedback capacitor (Cf1) to produce a voltage (V1) voltage-divided by a first capacitor (8), and applies a reference voltage (Vc) to one end of a second feedback capacitor (Cf2) to produce a voltage (V2) voltage-divided by a second capacitor (9).

Inventors:
TSUJI Nobuaki (10-1 Nakazawa-cho, Naka-ku, Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
Application Number:
JP2014/084002
Publication Date:
July 02, 2015
Filing Date:
December 22, 2014
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
G01P21/00; G01D5/241; G01P15/125; H03F3/343; H03F3/45
Domestic Patent References:
WO2013102499A12013-07-11
WO2013040508A12013-03-21
Foreign References:
JP2011220764A2011-11-04
JP2008102091A2008-05-01
US20050218911A12005-10-06
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (AOYAMA & PARTNERS, Umeda Hankyu Bldg. Office Tower 8-1, Kakuda-cho, Kita-ku, Osaka-sh, Osaka 17, 〒5300017, JP)
Download PDF: