Decoder for delta-modulated code

Details Decoder for delta-modulated code Decoder for delta-modulated code

1990-09-07

1991-08-27

Pellinen, A. D.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341 77, 341143, 375 25, H03M 182

Patent

active

050437291

ABSTRACT:
A decoder for decoding a delta-modulated code represented with binary digit "1" or "0" to convert it into an analog signal, wherein when the delta-modulated code takes the first value ("1" or "0"), a positive pulse signal is applied to an integrator to increase its accumulated value by a constant value and when the delta-modulated code takes the second value ("0" or "1"), a negative pulse signal is appied to the integrator to decrease its accumulated value by the constant value, and this accumulated value of the integrator is outputted as an analog signal which corresponds to a code train of the delta-modulated code. The decoder is characterized in that it has a pulse width modulater which limits an effective pulse width of the pulse signal by performing pulse width modulation of the positive or negative pulse signal in response to a control signal.

REFERENCES:
patent: 3937897 (1976-02-01), Song
patent: 3956700 (1976-05-01), Condon
patent: 4035724 (1977-07-01), Stephenne et al.
patent: 4044306 (1977-08-01), Villeret et al.

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