Title :
A low-voltage CMOS phase shifter as a resistive sensor transducer
Author :
Ferri, Giuseppe ; de Laurentis, P.
Author_Institution :
Dipt. di Ingegneria Elettrica, l´´Aquila Univ., Italy
Abstract :
In this paper, we present a CMOS low-voltage phase shifter topology, to be applied in resistive sensor interfaces. The shifter results in a square wave shift which is proportional to the value of the sensor resistance. The proposed topology has been designed in CMOS Mietec 0.5 μm technology and can operate at supply voltages lower than 3 V, the minimum value being 1.2 V. The circuit can be easily transformed into an oscillator by a simple terminal connection. The circuit shows good insensitivity to both the supply voltage and temperature variations (0.012%/mV and 0.017%/C, respectively), so it can be applied as an improved scheme for integrated interfaces for typical resistive sensors of MΩ range
Keywords :
CMOS analogue integrated circuits; electric sensing devices; low-power electronics; phase shifters; 0.5 micron; 1.2 to 3 V; CMOS Mietec technology; LV CMOS phase shifter; low-voltage phase shifter topology; micropower consumption; oscillator; resistive sensor transducer; sensor interfaces; sensor resistance; square wave shift; terminal connection; Bridge circuits; CMOS technology; Capacitance; Circuit topology; Delay; Integrated circuit technology; Phase shifters; Temperature sensors; Transducers; Voltage;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.856401
