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Journals and Conferences
This paper will cover the development of two switched capacitor 20-pole filter chips meeting the frequency and phase response specifications for a full duplex 1200 baud modem fabricated in double-polysilicon NMOS.
A fully integrated 32-tap realtime programmable transversal filter will be described. Device uses RAMs and 16 MDACs for tap weight programming and pipe-organ BBD registers for signal delay and summing.
A speech recognition monolithic audio spectrum analyzer, using NMOS switched capacitor filter technology, will be covered. Chip consists of 16 channels, each containing a bandpass filter, half-wave rectifier and low-pass filter to detect the frequency components of the voice signal.