CA2140679A1 - Ringing Circuit for Use in Portable Telephone Set - Google Patents
Ringing Circuit for Use in Portable Telephone SetInfo
- Publication number
- CA2140679A1 CA2140679A1 CA 2140679 CA2140679A CA2140679A1 CA 2140679 A1 CA2140679 A1 CA 2140679A1 CA 2140679 CA2140679 CA 2140679 CA 2140679 A CA2140679 A CA 2140679A CA 2140679 A1 CA2140679 A1 CA 2140679A1
- Authority
- CA
- Canada
- Prior art keywords
- ringing
- mode
- telephone set
- portable telephone
- producing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
A portable telephone set having a ringing circuit for producing different ringing tones depending upon the use mode of the portable telephone set, a portable mode or a mobile mode. The ringing circuit comprises a mode detecting circuit for detecting the use mode, an internal loudspeaker housed in a housing or the portable telephone set for producing a first ringing signal when the portable telephone set is in the portable mode, an external loud-speaker connected externally of the housing for producing a second ringing signal when it is in the mobile mode and a ringing tone generator for generating a first and a second ringing tones for driving the respective loud-speakers producing first and second ringings. The first and second ringing tones have frequency spectra compatible with frequency characteristics of these loudspeakers to produce the respective ringings efficiently. The ringing signal generator may be a single ringing tone generating circuit producing two kinds of ringing tone or may be comprised of two different ringing tone generating circuits.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21233/1990 | 1990-01-31 | ||
JP2123390 | 1990-01-31 | ||
CA002035411A CA2035411C (en) | 1990-01-31 | 1991-01-31 | Ringing circuit for use in portable telephone set |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002035411A Division CA2035411C (en) | 1990-01-31 | 1991-01-31 | Ringing circuit for use in portable telephone set |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2140679A1 true CA2140679A1 (en) | 1991-08-01 |
CA2140679C CA2140679C (en) | 1997-10-14 |
Family
ID=25674466
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002140680A Expired - Fee Related CA2140680C (en) | 1990-01-31 | 1991-01-31 | Ringing circuit for use in portable telephone set |
CA002140679A Expired - Fee Related CA2140679C (en) | 1990-01-31 | 1991-01-31 | Ringing circuit for use in portable telephone set |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002140680A Expired - Fee Related CA2140680C (en) | 1990-01-31 | 1991-01-31 | Ringing circuit for use in portable telephone set |
Country Status (1)
Country | Link |
---|---|
CA (2) | CA2140680C (en) |
-
1991
- 1991-01-31 CA CA002140680A patent/CA2140680C/en not_active Expired - Fee Related
- 1991-01-31 CA CA002140679A patent/CA2140679C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2140679C (en) | 1997-10-14 |
CA2140680A1 (en) | 1991-08-01 |
CA2140680C (en) | 1997-02-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |