Method of converting a digital signal into an analog signal and

Details Method of converting a digital signal into an analog signal and Method of converting a digital signal into an analog signal and

1982-08-02

1985-09-17

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

328162, 328165, 329106, 332 9R, 332 37R, 340347M, 340347CC, 375 22, 377 42, H03K 1302

Patent

active

045423717

ABSTRACT:
This invention relates to a method of converting a digital signal into an analog signal and a digital-to-analog converter therefor.
In the invention, a digital signal having varying pulse width values is converted into a first pulse width signal, with each pulse varying in its pulse width in response to its respective data values and with the center of each pulse width being at a fixed time position within a respective sampling period, while a complement of the digital signal is converted into a second pulse width signal with each pulse varying in its pulse width in response to its respective data value and relative to said center of each respective pulse width. The first and second pulse width signals, after one of them is inverted, are mixed and pass through a smoothing filter to demodulate the digital signal into the analog signal.

REFERENCES:
patent: 4266201 (1981-05-01), Belfatto

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