F&H filter: A novel ultra-low power discrete time filter

作     者：Tavares, VMG Principe, JC Harris, JG 

作者机构：Univ Florida Dept Elect & Comp Engn Gainesville FL 32611 USA 

出 版 物：《ELECTRONICS LETTERS》 (电子学快报)

年 卷 期：1999年第35卷第15期

页      面：1226-1227页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：.capacitor duty discrete time time constants Continuous time fdter EdN dB 

摘      要：A new technique for designing filters with long time constants in the discrete time domain is presented. The F&H (filter and hold) methodology halts the state of a continuous time filter every T seconds resulting in a filter implementation with time constants that can be controlled in three distinct ways: by the sampling period T, the duty cycle k = tau/T or the time constant of the continuous time filter prototype, The final filter can be constructed from a typical Gm-C technique with very low power consumption.