Title :
A 1.8-V fully differential 2-stage OPAMP switched-capacitor delta-sigma modulator for Bluetooth application
Author :
Aziz, Z.A.A. ; Zulkifli, Tun Zainal Azni ; Saibon, Basir
Author_Institution :
Sch. of Electr. & Electron. Eng., Univ. Sains Malaysia, Seberang Perai Selatan, Malaysia
Abstract :
This paper presents a fully-differential OPAMP for the switched-capacitor multi-bit delta-sigma modulator. The OPAMP has been designed using Silterra 0.18-μm CMOS technology for operation at 1.8-V. Simulation shows that the OPAMP is capable to give mid-band gain as high as 76.59 dB and the unity gain frequency is 284.1-MHz while consuming only 1.618-mW of power. At 1.2-pF capacitive load, the OPAMP archives a 73.61 phase margin and increases as the load decreases.
Keywords :
Bluetooth; CMOS analogue integrated circuits; VHF amplifiers; delta-sigma modulation; differential amplifiers; operational amplifiers; switched capacitor networks; 0.18 micron; 1.2 pF; 1.618 mW; 1.8 V; 284.1 MHz; 76.59 dB; Bluetooth technology; CMOS technology; delta-sigma modulator; operational amplifier; switched capacitor; unity gain frequency; Bluetooth; CMOS technology; Clocks; Delta modulation; Frequency; Mirrors; Operational amplifiers; Switched capacitor circuits; Transconductance; Voltage;
Conference_Titel :
Semiconductor Electronics, 2004. ICSE 2004. IEEE International Conference on
Print_ISBN :
0-7803-8658-2
DOI :
10.1109/SMELEC.2004.1620921
