Mu law coder and decoder

Details Mu law coder and decoder Mu law coder and decoder

H - Electricity

03

M

354/98

H03M 1/00 (2006.01)

Patent

CA 1141034

935.031 ABSTRACT OF THE DISCLOSURE A digital-to-analog converter operates in accordance with the?255 compression law and includes an amplifier, a reference voltage source and a feedback resistor ladder atten- uator from the amplifier output to its input. The attenuator is multiplicatively weighted and referenced to the reference voltage. A current source or sink including a linearly weighted resistor ladder is also connected to the amplifier input. An analog-to-digital converter includes a similar resistor ladder attenuator and resistor ladder current source or sink at the input of a comparator. The attenuator is referenced to a reference potential. The digital signal is determined by logic circuitry responsive to the comparator output in a successive approximation operation.

316401

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