US5208852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound generation circuit
Assignee: Seiko Epson Corp
•
Filing: 1992-04-03
•
Granted: 1993-05-04
•
Expires: 2012-04-03
Abstract
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.
Inventors
- 👤 Tsuyoshi Tamura
- 👤 Masaoki Sagara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:57
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/30; H04M1/50; H04M1/505
Claims Analysis
Total Claims: 73
Claim 1
Independent Claim
93 words
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.
Claim 2
Dependent Claim
93 words
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.
Claim 3
Dependent Claim
28 words
The sound generation circuit as claimed in claim 1, wherein said memory means includes a second memory for storing data associated with the tempo of the musical note.
Claim 4
Dependent Claim
41 words
The sound generation circuit as claimed in claim 1, wherein the output signal of the frequency dividing means when at a first frequency is associated with a musical note and when at a second frequency is associates with a dial tone.
Claim 5
Dependent Claim
28 words
The sound generation circuit as claimed in claim 3, further including speaker means for producing the dual tone based on the output signal of said frequency dividing means.
Claim 6
Dependent Claim
44 words
The sound generation circuit as claimed in claim 1, further including logic means to inhibit selection by said selection means of data for controlling production by the sound generation circuit of a musical note when said sound generation circuit is producing a dial tone.
Claim 7
Dependent Claim
28 words
The sound generation circuit as claimed in claim 5, further including speaker means for producing the dual tone based on the output signal of said frequency dividing means.
Claim 8
Dependent Claim
53 words
The sound generation circuit as claimed in claim 1, wherein said frequency dividing means is operable for also producing the output signal as a pulse train and said memory means is operable for also storing and said selection means is operable for also selecting data for controlling the timing of the pulse train.
Claim 9
Dependent Claim
36 words
The sound generation circuit as claimed in claim 7, further including dial control means for controlling production of pause, break, make and mute time signals by said sound generation circuit in response to said pulse train.
Claim 10
Dependent Claim
28 words
The sound generation circuit as claimed in claim 8, further including speaker means for producing the dual tone based on the output signal of said frequency dividing means.
Claim 11
Dependent Claim
34 words
The sound generation circuit as claimed in claim 1, further including additional memory means for storing data for controlling the scale of the musical note and for controlling the frequency of the dual tone.
Claim 12
Dependent Claim
41 words
The sound generation circuit as claimed in claim 10, wherein said additional memory means is responsive to said output signal of said frequency dividing means for advancing the address of the data to be read out from the additional memory means.
Claim 13
Dependent Claim
23 words
The sound generation circuit as claimed in claim 10, further including additional selection means for selecting data stored in said additional memory means.
Claim 14
Dependent Claim
33 words
The sound generation circuit as claimed in claim 12, wherein said additional frequency dividing means is responsive to the selected data of said additional memory means representing the scale of the musical note.
Claim 15
Dependent Claim
40 words
The sound generation circuit as claimed in claim 12, wherein said memory means is responsive to the selected data of said additional memory means for selecting the address of the data to be read out by said frequency dividing means.
Claim 16
Dependent Claim
30 words
The sound generation circuit as claimed in claim 14, wherein the memory means is responsive to selected data of said additional memory means representing the length of the musical note.
Claim 17
Dependent Claim
36 words
The sound generation circuit as claimed in claim 12, further including additional frequency dividing means for producing an additional output signal having a frequency which varies based on the data selected by the additional selection means.
Claim 18
Dependent Claim
103 words
The sound generation circuit as claimed in claim 16, wherein the additional memory means includes two memories and the additional frequency dividing means includes two frequency dividers, one of the two memories and one of the two frequency dividers being associated with formation of the main melody of a musical sound and a group of high frequencies which are part of the dial tone and the other of the two memories and the other of the two frequency dividers being associated with formation of an accompaniment of the musical sound and a group of low frequencies which are part of the dial tone.
Claim 19
Dependent Claim
28 words
The sound generation circuit as claimed in claim 16, further including speaker means for producing the dual tone based on the output signal of said frequency dividing means.
Claim 20
Dependent Claim
44 words
The sound generation circuit as claimed in claim 16, further including logic means to inhibit selection by said selection means of data for controlling production by the sound generation circuit of a musical note when said sound generation circuit is producing a dial tone.
Claim 21
Dependent Claim
53 words
The sound generation circuit as claimed in claim 19, wherein said frequency dividing means is operable for also producing the output signal as a pulse train and said memory means is operable for also storing and said selection means is operable for also selecting data for controlling the time of the pulse train.
Claim 22
Dependent Claim
36 words
The sound generation circuit as claimed in claim 20, further including dial control means for controlling production of pause, break, make and mute time signals by said sound generation circuit in response to said pulse train.
Claim 23
Dependent Claim
25 words
The sound generation circuit as claimed in claim 16, further including waveform memory means for storing waveform data corresponding to musical sound and dial tone.
Claim 24
Dependent Claim
35 words
The sound generation circuit of claim 22, wherein the address of the data to be read out from the waveform memory means is based on the additional output signal of the additional frequency dividing means.
Claim 25
Dependent Claim
28 words
The sound generation circuit of claim 22, wherein the selection means is operable for also selecting the waveform data to be read out from the waveform memory means.
Claim 26
Dependent Claim
31 words
The sound generation circuit of claim 24, further including digital to analog conversion means for converting the digitized waveform data read out from the waveform memory means to an analog equivalent.
Claim 27
Dependent Claim
35 words
The sound generation circuit of claim 24, wherein the address of the data to be read out from the waveform memory means is based on the additional output signal of the additional frequency dividing means.
Claim 28
Dependent Claim
31 words
The sound generation circuit of claim 26, further including digital to analog conversion means for converting the digitized waveform data read out from the waveform memory means to an analog equivalent.
Claim 29
Dependent Claim
99 words
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.
Claim 30
Dependent Claim
99 words
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.
Claim 31
Dependent Claim
42 words
The sound generation circuit of claim 28, further including logic means to inhibit selection by said selection means of data or controlling production by the sound generation circuit of a musical note when said sound generation circuit is producing a dial tone.
Claim 32
Dependent Claim
39 words
The sound generation circuit of claim 29, wherein said additional memory means is responsive to said output signal of said frequency dividing means for advancing the address of the data to be read out from the additional memory means.
Claim 33
Dependent Claim
51 words
The sound generation circuit of claim 28, wherein said frequency dividing means is operable for also producing the output signal as a pulse train and said memory means is operable for also storing and said selection means is operable for also selecting data for controlling the timing of the pulse train.
Claim 34
Dependent Claim
27 words
The sound generation circuit of claim 31, wherein production of the pulse train is also based on the length of the data selected by said selection means.
Claim 35
Dependent Claim
34 words
The sound generation circuit of claim 31, further including dial control means for controlling production of pause, break, make and mute time signals by said sound generation circuit in response to said pulse train.
Claim 36
Dependent Claim
26 words
The sound generation circuit of claim 33, further including speaker means for producing the dual tone based on the output signal of said frequency dividing means.
Claim 37
Dependent Claim
39 words
The sound generation circuit of claim 31, wherein said additional memory means is responsive to said output signal of said frequency dividing means for advancing the address of the data to be read out from the additional memory means.
Claim 38
Dependent Claim
34 words
The sound generation circuit of claim 35, further including dial control means for controlling production of pause, break, make and mute time signals by said sound generation circuit in response to said pulse train.
Claim 39
Dependent Claim
21 words
The sound generation circuit of claim 28, further including additional selection means for selecting data stored in said additional memory means.
Claim 40
Dependent Claim
31 words
The sound generation circuit of claim 37, wherein said additional frequency dividing means is responsive to the selected data of said additional memory means representing the scale of the musical note.
Claim 41
Dependent Claim
38 words
The sound generation circuit of claim 37, wherein said memory means is responsive to the selected data of said additional memory means for selecting the address of the data to be read out by said frequency dividing means.
Claim 42
Dependent Claim
28 words
The sound generation circuit of claim 39, wherein the memory means is responsive to selected data of said additional memory means representing the length of the musical note.
Claim 43
Dependent Claim
26 words
The sound generation circuit of claim 40, further including speaker means for producing the dual tone based on the output signal of said frequency dividing means.
Claim 44
Dependent Claim
42 words
The sound generation circuit of claim 37, further including logic means to inhibit selection by said selection means of data or controlling production by the sound generation circuit of a musical note when said sound generation circuit is producing a dial tone.
Claim 45
Dependent Claim
39 words
The sound generation circuit of claim 42, wherein said additional memory means is responsive to said output signal of said frequency dividing means for advancing the address of the data to be read out from the additional memory means.
Claim 46
Dependent Claim
38 words
The sound generation circuit of claim 43, wherein said memory means is responsive to the selected data of said additional memory means for selecting the address of the data to be read out by said frequency dividing means.
Claim 47
Dependent Claim
28 words
The sound generation circuit of claim 44, wherein the memory means is responsive to selected data of said additional memory means representing the length of the musical note.
Claim 48
Dependent Claim
26 words
The sound generation circuit of claim 45, further including speaker means for producing the dual tone based on the output signal of said frequency dividing means.
Claim 49
Dependent Claim
34 words
The sound generation circuit of claim 37, further including additional frequency dividing means for producing an additional output signal having a frequency which varies based on the data selected by the additional selection means.
Claim 50
Dependent Claim
101 words
The sound generation circuit of claim 47, wherein the additional memory means includes two memories and the additional frequency dividing means includes two frequency dividers, one of the two memories and one of the two frequency dividers being associated with formation of the main melody of a musical sound and a group of high frequencies which are part of the dial tone and the other of the two memories and the other of the two frequency dividers being associated with formation of an accompaniment of the musical sound and a group of low frequencies which are part of the dial tone.
Claim 51
Dependent Claim
42 words
The sound generation circuit of claim 47, further including logic means to inhibit selection by said selection means of data or controlling production by the sound generation circuit of a musical note when said sound generation circuit is producing a dial tone.
Claim 52
Dependent Claim
101 words
The sound generation circuit of claim 49, wherein the additional memory means includes two memories and the additional frequency dividing means includes two frequency dividers, one of the two memories and one of the two frequency dividers being associated with formation of the main melody of a musical sound and a group of high frequencies which are part of the dial tone and the other of the two memories and the other of the two frequency dividers being associated with formation of an accompaniment of the musical sound and a group of low frequencies which are part of the dial tone.
Claim 53
Dependent Claim
23 words
The sound generation circuit of claim 49, further including waveform memory means for storing waveform data corresponding to musical sound and dial tone.
Claim 54
Dependent Claim
35 words
The sound generation circuit of claim 51, wherein the address of the data to be read out from the waveform memory means is based on the additional output signal of the additional frequency dividing means.
Claim 55
Dependent Claim
28 words
The sound generation circuit of claim 51, wherein the selection means is operable for also selecting the waveform data to be read out from the waveform memory means.
Claim 56
Dependent Claim
35 words
The sound generation circuit of claim 53, wherein the address of the data to be read out from the waveform memory means is based on the additional output signal of the additional frequency dividing means.
Claim 57
Dependent Claim
31 words
The sound generation circuit of claim 53, further including digital to analog conversion means for converting the digitized waveform data read out from the waveform memory means to an analog equivalent.
Claim 58
Dependent Claim
23 words
The sound generation circuit of claim 47, further including waveform memory means for storing waveform data corresponding to musical sound and dial tone.
Claim 59
Dependent Claim
101 words
The sound generation circuit of claim 56, wherein the additional memory means includes two memories and the additional frequency dividing means includes two frequency dividers, one of the two memories and one of the two frequency dividers being associated with formation of the main melody of a musical sound and a group of high frequencies which are part of the dial tone and the other of the two memories and the other of the two frequency dividers being associated with formation of an accompaniment of the musical sound and a group of low frequencies which are part of the dial tone.
Claim 60
Dependent Claim
31 words
The sound generation circuit of claim 56, further including digital to analog conversion means for converting the digitized waveform data read out from the waveform memory means to an analog equivalent.
Claim 61
Dependent Claim
101 words
The sound generation circuit of claim 58, wherein the additional memory means includes two memories and the additional frequency dividing means includes two frequency dividers, one of the two memories and one of the two frequency dividers being associated with formation of the main melody of a musical sound and a group of high frequencies which are part of the dial tone and the other of the two memories and the other of the two frequency dividers being associated with formation of an accompaniment of the musical sound and a group of low frequencies which are part of the dial tone.
Claim 62
Dependent Claim
28 words
The sound generation circuit of claim 56, wherein the selection means is operable for also selecting the waveform data to be read out from the waveform memory means.
Claim 63
Dependent Claim
31 words
The sound generation circuit of claim 60, further including digital to analog conversion means for converting the digitized waveform data read out from the waveform memory means to an analog equivalent.
Claim 64
Dependent Claim
101 words
The sound generation circuit of claim 60, wherein the additional memory means includes two memories and the additional frequency dividing means includes two frequency dividers, one of the two memories and one of the two frequency dividers being associated with formation of the main melody of a musical sound and a group of high frequencies which are part of the dial tone and the other of the two memories and the other of the two frequency dividers being associated with formation of an accompaniment of the musical sound and a group of low frequencies which are part of the dial tone.
Claim 65
Dependent Claim
35 words
The sound generation circuit of claim 56, wherein the address of the data to be read out from the waveform memory means is based on the additional output signal of the additional frequency dividing means.
Claim 66
Dependent Claim
30 words
The sound generation circuit of claim 63, further including digital to analog means for converting the digitized waveform data read out from the waveform memory means to an analog equivalent.
Claim 67
Dependent Claim
101 words
The sound generation circuit of claim 63, wherein the additional memory means includes two memories and the additional frequency dividing means includes two frequency dividers, one of the two memories and one of the two frequency dividers being associated with formation of the main melody of a musical sound and a group of high frequencies which are part of the dial tone and the other of the two memories and the other of the two frequency dividers being associated with formation of an accompaniment of the musical sound and a group of low frequencies which are part of the dial tone.
Claim 68
Dependent Claim
26 words
The sound generation circuit of claim 63, further including speaker means for producing the dual tone based on the output signal of said frequency dividing means.
Claim 69
Dependent Claim
111 words
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.
Claim 70
Dependent Claim
111 words
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.
Claim 71
Dependent Claim
28 words
The sound generation circuit as claimed in claim 67, wherein said memory means includes a second memory for storing data associated with the tempo of the musical note.
Claim 72
Dependent Claim
115 words
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.
Claim 73
Dependent Claim
115 words
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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |