Title :
A modified structure for high-speed and low-overshoot comparator-based switched-capacitor integrator
Author :
Roozbehani, Ali ; Pishgar, Seyyed Hossein ; Hashemipour, Omid
Author_Institution :
VLSI Lab., Shahid Beheshti Univ., Tehran, Iran
Abstract :
In this paper, a simpler and faster comparator-based switched-capacitor (CBSC) architecture than the conventional CBSC circuits is presented. A voltage dependent current source is used to improve the performance of the CBSC integrator. Also, the preset phase is modified to increase the sampling frequency. A CBSC integrator is designed and simulated in 180 nm CMOS technology with 1.8 V supply voltage to verify this method. The input signal frequency of sinusoidal wave and the sampling frequency are 200 kHz and 10 MHz, respectively.
Keywords :
CMOS integrated circuits; comparators (circuits); switched capacitor networks; CBSC architecture; CBSC circuits; CBSC integrator; CMOS technology; frequency 10 MHz; frequency 200 kHz; high-speed comparator-based switched-capacitor integrator; low-overshoot comparator-based switched-capacitor integrator; sampling frequency; signal frequency; sinusoidal wave; size 180 nm; voltage 1.8 V; voltage dependent current source; CMOS integrated circuits; CMOS technology; Charge transfer; Delays; Switches; Threshold voltage; Voltage control; Comparator; Comparator-Based Switched-Capacitor circuits; Integrator; Voltage-controlled current source; data converters;
Conference_Titel :
Electrical Engineering (ICEE), 2013 21st Iranian Conference on
Conference_Location :
Mashhad
DOI :
10.1109/IranianCEE.2013.6599653
