Switched-capacitor pre-processor for speech processing using SC CIC filter

Yoshihiko Horio, Hiroyuki Takase, Shogo Nakamura

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


A switched-capacitor (SC) preprocessing system is proposed for analog speech processing. The preprocessor extracts the time transition pattern of the local peaks of the speech spectrum and emphasizes the peaks in real-time. A switched-capacitor cascaded integrated-comb (CIC) filter is proposed as one of the construction blocks of the preprocessor. The architecture of the preprocessor is described, and the details of some of the construction blocks are given. Local peak extraction filtering using SC CIC filters is proposed. The filter emphasizes the local peak pattern of the spectrum in the direction of the channel of the bandpass filter bank (frequency domain) and smoothes its transition pattern in the time domain. The SC CIC filter design technique is given.

Original languageEnglish
Pages (from-to)1311-1314
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
Publication statusPublished - 1989
EventIEEE International Symposium on Circuits and Systems 1989, the 22nd ISCAS. Part 1 - Portland, OR, USA
Duration: 1989 May 81989 May 11


Dive into the research topics of 'Switched-capacitor pre-processor for speech processing using SC CIC filter'. Together they form a unique fingerprint.

Cite this