Digital-to-analog conversion system

Details Digital-to-analog conversion system Digital-to-analog conversion system

1987-06-29

1988-08-09

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347DD, H03M 166

Patent

active

047631082

ABSTRACT:
A digital-to-analog conversion system including: a code conversion circuit for converting an input binary code to a three states code; the code conversion circuit designating each digit from one digit lower than a most significant digit to a least significant digit; when a designated digit and both lower and upper digits thereof are the same, a corresponding digit of the three states code is set to a first state, except for the above case, the designated digit is inverted, and when the upper digit of the designated digit is "0", the corresponding digit of the three states code is set to a second state, and when the digit lower than said designated digit is "1", the corresponding digit of the three states code is set to a third state, and a digital-to-analog conversion means connected to the code conversion and controlled by the three states code for outputting an analog value.

REFERENCES:
patent: 3251052 (1966-05-01), Hoffman
patent: 4529965 (1985-07-01), Lee
U.S. Ser. No. 902,870, filed 9/2/86.
IEEE 1986, Custom Integrated Circuits Conference, pp. 366-369.
McCharles, "IEEE Transactions Circuits & Systems", vol. CAS-25, pp. 490-497, Jul. 1978.

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