Title :
A 1.5 V low-power third order continuous-time lowpass ΣΔ A/D converter
Author :
Gerfers, Friedel ; Manoli, Yiannos
Author_Institution :
Inst. of Microelectron., Saarland Univ., Saarbrucken, Germany
Abstract :
This paper presents the design of a 3rd-order lowpass ΣΔ analog-to-digital (A/D) converter using a continuous-time (CT) loopfilter. The loopfilter has been implemented by using active RC-integrators. The influence of the low supply voltage on the building blocks such as the amplifier and the common mode feedback as well as on the overall ΣΔ modulator is discussed. Simulation results of the 1.5 V CT ΣΔ A/D converter show a 75 dB dynamic range in a bandwidth of 25 kHz. The expected power consumption is less than 300 μW.
Keywords :
circuit feedback; continuous time systems; integrating circuits; low-power electronics; sigma-delta modulation; 1.5 V; 25 kHz; 300 muW; CT loopfilter; active RC-integrators; common mode feedback; continuous-time lowpass ΣΔ A/D converter; dynamic range; low-power third order A/D convertor; overall sigma-delta modulator; power consumption; Analog-digital conversion; Batteries; Clocks; Delay; Feedback; Filters; Low voltage; Microelectronics; Permission; Pulse width modulation;
Conference_Titel :
Low Power Electronics and Design, 2000. ISLPED '00. Proceedings of the 2000 International Symposium on
Print_ISBN :
1-58113-190-9
DOI :
10.1109/LPE.2000.155283
