A JSSC classic paper: Switched capacitor filters Grew the communications industry

Filtering circuits, the most ubiquitous of electronic signal-processing functions, made for spirited discussions as analog-to-digital technology solutions unfolded. Bedrich Hosticka´s 1978 paper on a MOS switched-capacitor filter marked the beginning of the dominance of switched-capacitor techniques for integrated audio-band filtering. In the ISSCC 40th Anniversary Commemorative Supplement in 1993, Robert W. Brodersen remembered that in the year following Hosticka´s paper two papers at ISSCC 1979 demonstrated the manufacturability of the approach in high-volume applications. The circuit served as part of an icon of the era of IC telecom, when a chip plot of 30 poles of switched-capacitor filtering by B.J. White, G. M. Jacobs, and G.F. Landsburg hung in the New York Museum of Modern Art for a number of years.