A novel high-order temporal moving average filter in sampler-based discrete-time receiver

Author

Shin, Soo-Hwan ; Cho, Yong-Ho ; Jo, Sung-Hun ; Yoo, Hyung-Joun

Author_Institution

Dept. of Electr. Eng., KAIST, Daejeon, South Korea

fYear

2011

fDate

Nov. 30 2011-Dec. 2 2011

Firstpage

117

Lastpage

120

Abstract

A discrete-time (DT) filter with high-order temporal moving average (TMA) by actively-weighted charge sampling is proposed. The weight of sampled charge can be effectively controlled by digitally-controlled variable operational transconductance amplifier (OTA). By switching the control transistors of the OTA, the transconductance can be changed according to the desired weight ratio. Therefore, high-order TMA operation can be possible. It has small size, increased voltage gain, and low parasitic effects. The suggested high-order TMA filter is implemented in the TSMC 0.18 μm CMOS process. DC current is about 9.7 mA.

Keywords

CMOS integrated circuits; discrete time filters; operational amplifiers; DC current; OTA; TSMC CMOS process; actively-weighted charge sampling; control transistor; digitally-controlled variable operational transconductance amplifier; discrete-time filter; high-order TMA filter; high-order TMA operation; high-order temporal moving average filter; sampler-based discrete-time receiver; size 0.18 mum; voltage gain; weight ratio; Capacitors; Clocks; Frequency response; Receivers; Scalability; Transconductance; Transistors; DT filter; TMA; actively-weighted charge sampling; charge sampler; transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio-Frequency Integration Technology (RFIT), 2011 IEEE International Symposium on

Conference_Location

Beijing

Print_ISBN

978-1-4577-0517-5

Type

conf

DOI

10.1109/RFIT.2011.6141739

Filename

6141739