A standard CMOS bridge-based analog interface for differential capacitive sensors
Institute of Electrical and Electronics Engineers Inc., 2017
Online
unknown
Zugriff:
This work describes an analog electronic interface, based on a modified De Sauty AC bridge, performing a differential capacitive sensor estimation. A suitable feedback loop tunes a Voltage Controlled Resistor to balance the bridge. The electronic circuit has been designed in a standard integrated CMOS technology (AMS 0.35μm) with a low supply voltage (±1.5 V) and a reduced power consumption (lower than 4mW). PSpice simulation results show a very good agreement with theoretical expectations. The output voltage accuracy shows a 0.03V maximum absolute error for a range of ±50% of sensor variations from its baseline value. Very small baseline values are allowed (tens of μF).
Titel: |
A standard CMOS bridge-based analog interface for differential capacitive sensors
|
---|---|
Autor/in / Beteiligte Person: | Depari, Alessandro ; Francesca Romana Parente ; Sisinni, Emiliano ; Barile, Gianluca ; Stornelli, Vincenzo ; Ferri, Giuseppe ; Flammini, Alessandra |
Link: | |
Veröffentlichung: | Institute of Electrical and Electronics Engineers Inc., 2017 |
Medientyp: | unknown |
Schlagwort: |
|
Sonstiges: |
|