Title:
DIGITAL SIGNAL GENERATION SYSTEM
Document Type and Number:
Japanese Patent JP2626520
Kind Code:
B2
Abstract:
PURPOSE: To provide a system simplifying a circuit and operating without changing a hardware even when exchanging to a memory storing different tones is necessary.
CONSTITUTION: This system has a host address holding and imparting means defining various kinds of prescribed signal waveforms as digital data, preliminarily storing the data in a tone ROM 101 by the address composed of a high order address for specifying the kind of a signal waveform and a low order address for successively reading digital data, defining the digital data of the address as specified data when the address is specified, holding the high order address and imparting it to the tone ROM 101, a counter 103 successively reading the digital data of the tone ROM 101 by setting and imparting the low order address, a detection circuit 104 detecting that the read digital data is the specified data and a means making the set value of the counter 103 into an initial value when the specified data is detected as a result.
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Inventors:
Koji Shinozaki
Application Number:
JP29699593A
Publication Date:
July 02, 1997
Filing Date:
November 26, 1993
Export Citation:
Assignee:
NEC
International Classes:
H04M19/02; H04Q1/446; H04Q1/45; (IPC1-7): H04Q1/446; H04M19/02; H04Q1/45
Domestic Patent References:
| JP63245058A | ||||
| JP63222570A |
Attorney, Agent or Firm:
Yosuke Goto (2 outside)