Title :
A 1-V Switched-Opamp Sample-and-Hold Circuit for Wideband Wireless Communication
Author :
Qin, Yajie ; Hong, Zhiliang ; Signell, Svante
Author_Institution :
KTH-the R. Inst. of Technol., Stockholm
Abstract :
This paper presents a 1-V 10bit 50MSPS Switched- Opamp (SO) S/H circuit, designed in 3.3V/1.8V 0.18 mum 1P6M CMOS technology, which could be used in wideband wireless transceivers. A new architecture of the low voltage switchable opamp with improved common-mode feed back (CMFB) loop is introduced for its fast wake-up speed. Simulation results show the S/H circuit achieves a THD of -75dB and a SFDR of 76dB at the Nyquist frequency (Fin = Fs/2). The opamp only dissipates a static power of 1.9mW even in active phase.
Keywords :
CMOS integrated circuits; feedback amplifiers; operational amplifiers; radiocommunication; sample and hold circuits; transceivers; wideband amplifiers; CMFB loop; CMOS technology; Nyquist frequency; SO S-H circuit; common-mode feed back; power 1.9 mW; size 0.18 mum; storage capacity 10 bit; switched-opamp sample-hold circuit; transceiver; voltage 1 V; voltage 1.8 V; voltage 3.3 V; wideband wireless communication; CMOS technology; Circuit simulation; Communication switching; Feeds; Frequency; Low voltage; Switching circuits; Transceivers; Wideband; Wireless communication;
Conference_Titel :
Circuits and Systems for Communications, 2008. ICCSC 2008. 4th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1707-0
Electronic_ISBN :
978-1-4244-1708-7
DOI :
10.1109/ICCSC.2008.66
