| 摘要 |
A plurality of weighted impedances is used in a switched divider configuration to produce self-compressing PCM encoders and self-expanding PCM decoders. For the encoders, the analog sample voltage is used as a reference voltage and the divider voltage is compared with a zero volt decision level for subsequent switch operation. For the decoders, a DC reference is used, and after the switches have been set in response to digital information, the divider voltage represents an analog sample voltage.
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