An interface circuit for R-C impedance sensors with a relaxation oscillator

IEEE Transactions on Instrumentation and Measurement

Volumn 50, Issue 6, 2001, Pages 1563-1567

  Nihtianov, Stoyan N ^b   Shterev, Georgi P ^c   Iliev, Blagoy ^d   Meijer, Gerard C M ^a,d  

^a IEEE

^b ASML   (Netherlands)

^c TECHNICAL UNIVERSITY OF SOFIA   (Bulgaria)

^d DELFT UNIVERSITY OF TECHNOLOGY   (Netherlands)

Author keywords

Auto calibration technique; Conductivity measurement; First order oscillator; Impedance measurement system

Indexed keywords

ELECTRIC CONDUCTIVITY MEASUREMENT; ELECTRIC IMPEDANCE MEASUREMENT; MATHEMATICAL MODELS; RELAXATION OSCILLATORS;

FIRST ORDER OSCILLATOR; IMPEDANCE SENSORS; INTERFACE CIRCUIT;

ELECTRIC NETWORK SYNTHESIS;

EID: 0035719275     PISSN: 00189456     EISSN: None     Source Type: Journal    
DOI: 10.1109/19.982945     Document Type: Article

References (13)

1. Nondestructive on-line sterility testing of long shelf-life aseptically packed food products by impedance measurements
2. Indirect conductivity measurement of liquids in flexible containers
3. High-accuracy measurement techniques for capacitance transducers
4. A self-balancing circuit to measure capacitance and loss conductance for industrial applications
5. A vector impedance meter digitally controlled
6. Digital measurement of the polar and rectangular forms of impedances
7. A digital signal-processing instrument for impedance measurement
8. Low-cost, high-precision measurement system for capacitive sensors
9. A microcontroller-based scheme for measurement of L and C
10. Capacitive angular transducer to 180°
11. Capacitive level measurement unit
12. A novel low-cost capacitive-sensor interface
13. A relaxation-oscillator-based interface for high-accuracy ratio-metric signal processing of differential-capacitance transducers