DOI: 10.1109/isscc.1981.1156244
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K. Yamakido, T. Suzuki, M. Tanaka, K. Yasunari, J. Sakaguchi, S. Hagiwara

Abstract: A SECOND GENERATION voice-to-PCM conversion LSI, in which filters, CODEC, and voltage reference are involved, has been expected to reduce the cost and size of digital telecommunication equipment. To realize the chip, all device dimensions must be suitably reduced, internal crosstalk and coupling noise minimized, and power supply rejection ratio (PSRR) increased. This . paper will describe solutions to these problems, and experimental results of a single-chip CMOS filter CODEC. band signal is fed into an 8th o…

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