標題: A 1 GHz OTA-Based low-pass filter with a high-speed automatic tuning scheme
作者: Lo, Tien-Yu
Hung, Chung-Chih
電信工程研究所
Institute of Communications Engineering
公開日期: 2007
摘要: A continuous-time 4th-order equiripple linear phase G.-C filter with an automatic tuning circuit is presented. A high speed OTA based on the inverter structure is realized. The combined CMFF and CMFB circuit ensures the input and output common-mode stability. The gain performance could be maintained by combining a negative resistor at the output nodes. Transconductance tuning can be achieved by adjusting the bulk voltage by using the Deep-NWELL technology. Through the use of the OTA as a building block with a modified automatic tuning scheme, the filter -3dB cutoff frequency is 1GHz with the group delay less than 4% variation up to 1.5fc frequency. The -43dB of IM3 at filter cutoff frequency is obtained with -4dbm two tone signals. Implemented in 0.18-mu m CMOS process, the chip occupies 1mm(2) and consumes 175mW at a 1.5-V supply voltage.
URI: http://hdl.handle.net/11536/10988
ISBN: 978-1-4244-1359-1
期刊: 2007 IEEE ASIAN SOLID-STATE CIRCUITS CONFERENCE, PROCEEDINGS OF TECHNICAL PAPERS
起始頁: 408
結束頁: 411
Appears in Collections:Conferences Paper