A Single-Chip ADM LSI CODEC
- 1 February 1983
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 18 (1) , 33-39
- https://doi.org/10.1109/jssc.1983.1051896
Abstract
This paper describes the circuit design of an ADM (adaptive delta modulation) LSI CODEC with filters. The LSI chip is mounted in a 16-pin DIP and can operate with single low voltage supply. In order to realize a low power dissipation LSI IC, switched capacitor technology was used in the design of input/output filters and integrators, and C-array D/A converters and low voltage analog circuits were developed. An operational amplifier with a complementary differential input stage and a comparator with a capacitor-coupled input stage were employed to obtain a wide input voltage range with a low voltage supply. This CODEC achieves speech quality higher than that of 6-bit µ-law PCM CODEC at 32 kbits/s and power dissipation of below 30 mW.Keywords
This publication has 5 references indexed in Scilit:
- A high quality ADM LSI codec at 32 kbit/s for digital speech communicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- A single-chip codec with switched-capacitor filtersIEEE Journal of Solid-State Circuits, 1981
- Design techniques for MOS switched capacitor ladder filtersIEEE Transactions on Circuits and Systems, 1978
- A segmented μ-255 law PCM voice encoder utilizing NMOS technologyIEEE Journal of Solid-State Circuits, 1976
- Digital coding of speech waveforms: PCM, DPCM, and DM quantizersProceedings of the IEEE, 1974