Patent · US Expired

Apparatus for producing a plurality of audio sound effects

US4314236A · kind A · utility

98Cited by

1References

7Claims

0Family size

Assignee

Atari Corporation · US

Inventors

Steven T. Mayer · Lake Oswego, US
Ronald E. Milner · Grass Valley, US

Key dates

Filing date	Jan 24, 1979
Grant date	Feb 2, 1982
Priority date	—
Expiry date	Jan 24, 1999

Classification

Technology area (CPC G)Physics
CPC primaryG10H2250/381
WIPO fieldFurniture, games
WIPO sectorOther fields

Abstract

Apparatus for producing a plurality of audio sound effects such as shots, explosions, and airplane and car sounds, used in electronic games utilizes a variable clock driving a variable digital noise generator whose audio output amplitude is shaped by either of two types of control units. In one type the density or duty cycle is varied by selectively ANDing together outputs from a polynomial counter. In a second embodiment a digital to analog converter utilizing gated resistive summing provides the amplitude control the gates being driven by a four bit data register which in turn is driven by the game control means.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.