Title :
A 5-80MHz CMOS Gm-C Low-Pass Filter with On-Chip Automatic Tuning
Author :
Ding, Yi ; Liu, Lintao ; Li, Ruzhang ; Zhang, Xin ; Liu, Lu
Author_Institution :
Sichuan Inst. of Solid-State Circuits, Chongqing, China
Abstract :
A fifth-order CMOS Gm-C Chebyshev low-pass filter with a tunable cutoff frequency of 5-80 MHz is presented. A phase-locked loop (PLL) frequency synthesizer control system automatically references the frequency response of the filter to an external fixed clock frequency. Spectre simulation results of the 1.8-V filter in a 0.18-μm CMOS process show that the cutoff frequency varies by less than 1 percent for a temperature range of -40-85 °C. The complete circuit features 45 dB dynamic range and consumes 12.2-43.5 mW.
Keywords :
CMOS integrated circuits; Chebyshev filters; frequency synthesizers; low-pass filters; phase locked loops; external fixed clock frequency; fifth-order CMOS Gm-C Chebyshev low-pass filter; on-chip automatic tuning; phase-locked loop frequency synthesizer control system; power 12.2 mW to 43.5 mW; size 0.18 mum; temperature -40 degC to 85 degC; tunable cutoff frequency; voltage 1.8 V; CMOS integrated circuits; Cutoff frequency; Low pass filters; Phase locked loops; Transistors; Tuning; Voltage-controlled oscillators; Gm-C; phase-locked loop; tunable cutoff frequency;
Conference_Titel :
Digital Manufacturing and Automation (ICDMA), 2011 Second International Conference on
Conference_Location :
Zhangjiajie, Hunan
Print_ISBN :
978-1-4577-0755-1
Electronic_ISBN :
978-0-7695-4455-7
DOI :
10.1109/ICDMA.2011.9
