A 2-Vpp 80-200-MHz fourth-order continuous-time linear phase filter with automatic frequency tuning

被引：34
作者：
Chen, MD [1 ]
Silva-Martínez, J
Rokhsaz, S
Robinson, M
机构：
[1] Texas A&M Univ, Analog & Mixed Signal Ctr, Dept Elect Engn, College Stn, TX 77840 USA
[2] Xilinx, Commun Technol Div, Austin, TX 78750 USA
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2003年 / 38卷 / 10期
关键词：
adaptive bias; common-mode feedback (CMFB); common-mode feedforward (CMFF); low voltage; OTA-C filters; pseudodifferential amplifiers;
D O I：
10.1109/JSSC.2003.817595
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A CMOS 80-200-MHz fourth-order continuous-time 0.05degrees equiripple linear phase filter with an automatic frequency tuning system is presented. An operational transconductance amplifier based on transistors operating in triode region is used and a circuit that combines common-mode feedback, common-mode feedforward, and adaptive bias is introduced. The chip was fabricated in a 0.35-mum process; filter experimental results have shown a total harmonic distortion less than -44 dB for a 2-V-PP differential input with a single 2.3-V power supply. The group delay ripple is less than 4% for frequencies up to 1.5 f(c). The frequency tuning error is below 5%.
引用
收藏
页码：1745 / 1749
页数：5
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