Title:
ELECTRONIC MEASUREMENT CIRCUIT
Document Type and Number:
Japanese Patent JP2016156808
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a measurement circuit having high resolution and excellent linearity using a capacitive sensor as a measurement sensor.SOLUTION: The electronic measurement circuit includes: a first integration unit 5 having two integrators configured so as to be alternately connected to a common electrode for integrating electric charge received from the sensor connected to the common electrode; a first comparator 9 for comparing analog output values from the first integration unit; a second integration unit 7 for integrating electric charge received from the first integration unit 5; a second comparator 19 for comparing analog output values from the second integration unit; a switching circuit 3 for switching different voltage values across a capacitor; a feedback circuit 11 for supplying a digital output signal ai from the first comparator to the switching circuit, and for controlling the operation; and an increment calculation unit 13 for receiving digital output signals ai and bi from the comparator, and for supplying a final digital output signal y.SELECTED DRAWING: Figure 1
Inventors:
CHRISTOPHE ENTRINGER
LUCA ROSSI
SYLVAIN GROSJEAN
JEAN-MICHEL DAGA
LUCA ROSSI
SYLVAIN GROSJEAN
JEAN-MICHEL DAGA
Application Number:
JP2016015220A
Publication Date:
September 01, 2016
Filing Date:
January 29, 2016
Export Citation:
Assignee:
EM MICROELECTRONIC MARIN SA
International Classes:
G01P15/125
Domestic Patent References:
| JP2008507221A | 2008-03-06 | |||
| JP2001518612A | 2001-10-16 | |||
| JP2001519534A | 2001-10-23 |
Foreign References:
| WO2015115264A1 | 2015-08-06 |
Attorney, Agent or Firm:
Shigeki Yamakawa
Masaki Yamakawa
Masaki Yamakawa