Title :
A Continuous-Time Programmable Digital FIR Filter
Author :
Li, Yee William ; Shepard, Kenneth L. ; Tsividis, Yannis P.
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY
Abstract :
In this paper, we describe the design and implementation of a continuous-time finite-impulse-response processor chain, which includes a 6-bit asynchronous ADC, an asynchronous digital core, and an 8-bit asynchronous DAC designed in TSMC 0.25-mum technology. The continuous-time, discrete-amplitude systems combine benefits associated with analog and digital systems. Discrete-amplitude representations leverage the noise immunity and robustness of digital implementations. Continuous-time, nonsampled operation prevents aliasing and reduces the in-band quantization noise associated with the aliasing of subharmonic components. We present measurement results demonstrating an audio low-pass filter with a bandwidth of 6.0 kHz
Keywords :
FIR filters; analogue-digital conversion; continuous time filters; digital-analogue conversion; low-pass filters; microwave filters; programmable filters; 0.25 micron; 6 bit; 6.0 kHz; 8 bit; TSMC technology; asynchronous ADC; asynchronous DAC; asynchronous digital core; audio low-pass filter; continuous-time finite-impulse-response processor chain; continuous-time programmable filter; continuous-time systems; digital FIR filter; discrete-amplitude systems; in-band quantization noise; noise immunity; subharmonic components; Analog-digital conversion; CMOS technology; Circuits; Digital signal processing; Digital systems; Finite impulse response filter; Laboratories; Noise reduction; Quantization; Signal processing; Asynchronous analog-to-digital conversion; continuous-time digital signal processing;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2006.883314
