TY - GEN
T1 - The design of voltage controlled current source (VCCS) for single frequency Electrical Impedance Tomography (EIT)
AU - Umbu, Ari Bangkit Sanjaya
AU - Endarko,
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/11/29
Y1 - 2017/11/29
N2 - Electrical Impedance Tomography (EIT) is an imaging technique for mapping the conductivity distribution of an object. One of the most significant circuit blocks in the EIT system is Voltage Controlled Current Source (VCCS) circuit. The VCCS should be able to supply a current ranging from 0.5 to 5 mA at 10 kHz - 1 MHz and should be adequate to support the load at the range of 100 Ohm - 10 kOhm. The main purpose of this study is to design the VCCS with a constant current of 1 mA at 20 kHz. We designed four types of VCCS by using two types of voltage-controlled oscillator (VCO) circuits, two types of voltage to current converter (VCC) circuits, and a fourth order Butterworth Bandpass Filter (BPF) circuit (Sallen-Key topology). The VCO circuit was designed with two types of Integrated Circuits (IC) which are XR2206 (VCO 1) and AD9850 (VCO 2), whereas the VCC circuit was fabricated based on Enhanced Howland (EH) circuit (VCC 1) and Triple Op-Amp circuit (TOA) (VCC 2). The results show that VCCS 4 which was designed with the combination of VCO 2, VCC 2, and BPF gave the best performance compared to the three other types of VCCS circuit. The VCCS 4 is capable of delivering a constant current for 1 mA at 20 kHz with a load value of up to 3.72 kOhm. However, the four VCCS types that have been designed could be used as a current source in the EIT system for a single frequency.
AB - Electrical Impedance Tomography (EIT) is an imaging technique for mapping the conductivity distribution of an object. One of the most significant circuit blocks in the EIT system is Voltage Controlled Current Source (VCCS) circuit. The VCCS should be able to supply a current ranging from 0.5 to 5 mA at 10 kHz - 1 MHz and should be adequate to support the load at the range of 100 Ohm - 10 kOhm. The main purpose of this study is to design the VCCS with a constant current of 1 mA at 20 kHz. We designed four types of VCCS by using two types of voltage-controlled oscillator (VCO) circuits, two types of voltage to current converter (VCC) circuits, and a fourth order Butterworth Bandpass Filter (BPF) circuit (Sallen-Key topology). The VCO circuit was designed with two types of Integrated Circuits (IC) which are XR2206 (VCO 1) and AD9850 (VCO 2), whereas the VCC circuit was fabricated based on Enhanced Howland (EH) circuit (VCC 1) and Triple Op-Amp circuit (TOA) (VCC 2). The results show that VCCS 4 which was designed with the combination of VCO 2, VCC 2, and BPF gave the best performance compared to the three other types of VCCS circuit. The VCCS 4 is capable of delivering a constant current for 1 mA at 20 kHz with a load value of up to 3.72 kOhm. However, the four VCCS types that have been designed could be used as a current source in the EIT system for a single frequency.
KW - Butterworth bandpass filter (BPF)
KW - Current
KW - Electrical Impedance Tomography (EIT)
KW - Frequency
KW - Sallen-Key topology
UR - http://www.scopus.com/inward/record.url?scp=85043469703&partnerID=8YFLogxK
U2 - 10.1109/ISSIMM.2017.8124256
DO - 10.1109/ISSIMM.2017.8124256
M3 - Conference contribution
AN - SCOPUS:85043469703
T3 - Proceedings - 2017 International Seminar on Sensor, Instrumentation, Measurement and Metrology: Innovation for the Advancement and Competitiveness of the Nation, ISSIMM 2017
SP - 30
EP - 36
BT - Proceedings - 2017 International Seminar on Sensor, Instrumentation, Measurement and Metrology
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 International Seminar on Sensor, Instrumentation, Measurement and Metrology, ISSIMM 2017
Y2 - 25 August 2017 through 26 August 2017
ER -