Sound generation circuit
AssigneeSeiko Epson Corporation
InventorsTsuyoshi Tamura, Masaoki Sagara
Life of this patent
Estimating the term…
Abstract
A sound generation circuit for producing a dual tone which includes memory circuitry for storing data for controlling production of the dual tone, selection circuitry for selecting data stored in the memory circuitry and frequency dividers for producing an output signal having a frequency which varies based on the data selected by the selection circuitry. The production of the dual tone is based on the output signal of the frequency dividing circuitry. The sound generation circuit also includes logic circuitry to inhibit selection by the selection circuitry of data for controlling production by the sound generation circuit of a musical note when the sound generation circuit is currently producing a dual tone. The melody and dial sections of the sound generation circuit employ common elements.
Claims69
A sound generation circuit, comprising:
- memory means for storing data for controlling production by the sound generation circuit of a dual tone;
- selection means for selecting the data stored in the memory means;
- and
- frequency dividing means for producing an output signal having a frequency which varies based on the data selected by the selection means;
- wherein production of said dual tone is based on the output signal of said frequency dividing means and wherein said memory means includes a first memory for storing data associated with the length of a musical note.
A sound generation circuit, comprising:
- memory means for storing data for controlling production by the sound generation circuit of a dual tone;
- selection means for selecting the data stored in the memory means;
- and
- frequency dividing means for producing an output signal having a frequency which varies based on the data selected by the selection means;
- wherein production of said dual tone is based on the output signal of said frequency dividing means, and
- further including additional memory means for storing data for controlling the scale of a musical note and for controlling the frequencies of the dual tone.
A sound generation circuit, comprising:
- memory means for storing data for controlling production by the sound generation circuit of a dual tone;
- selection means for selecting the data stored in the memory means;
- and
- frequency dividing means for producing an output signal having a frequency which varies based on the data selected by the selection means;
- wherein production of said dual tone is based on the output signal of said frequency dividing means, and wherein said memory means includes a first memory for storing data associated with the length of a musical note;
- and
- speaker means for producing the dual tone based on the output signal of said frequency dividing means.
A sound generation circuit, comprising:
- memory means for storing data for controlling production by the sound generation circuit of a dual tone;
- selection means for selecting the data stored in the memory means;
- frequency dividing means for producing an output signal having a frequency which varies based on the data selected by the selection means;
- wherein production of said dual tone is based on the output signal of said frequency dividing means;
- further including additional memory means for storing data for controlling the scale of a musical note and for controlling the frequencies of the dual tone;
- and
- speaker means for producing the dual tone based on the output signal of said frequency dividing means.
Dependencies are inferred from the claim text.