JPS5550765A - Digital signal receiver - Google Patents
Digital signal receiverInfo
- Publication number
- JPS5550765A JPS5550765A JP12339978A JP12339978A JPS5550765A JP S5550765 A JPS5550765 A JP S5550765A JP 12339978 A JP12339978 A JP 12339978A JP 12339978 A JP12339978 A JP 12339978A JP S5550765 A JPS5550765 A JP S5550765A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- inputted
- circuit
- memory circuit
- output
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
- H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:To enhance the flexibility and the economic property by commonly employing the receiver by providing a digital filter, a coefficient value memory circuit and a control signal memory circuit in receiving the multifrequency MF and a push button PB signal. CONSTITUTION:The signal compressed to PCM is inputted to the filter portion 42 comprising a register and a digital filter through an expander 41. This output is inputted through the demultiplexer 43 through which MF signal is inputted to the multiplexer 47 and the PB signal is inputted to the multiplexer 47 through the limitter 45 and the output thereof is inputted to the filter portion 50. The output of the filter portion 50 is inputted to the comparison circuit 51. MF signal is compared with the signal from the variable threshold value circuit 53 and the PB signal is compared with the signal from the threshold value generating circuit 55 and they are outputted through the memory circuit 59. The coefficient value of the filter portions 42, 50 is generated from the memory circuits 61, 62 and the timing and control signals to the respective circuits are generated from the memory circuit 30. By changing the contents of the circuits 61, 62, 30, the one hardware can constitutes 1 number of PB receivers and m number of MF receivers in function.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53123399A JPS5831139B2 (en) | 1978-10-06 | 1978-10-06 | digital signal receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53123399A JPS5831139B2 (en) | 1978-10-06 | 1978-10-06 | digital signal receiver |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5550765A true JPS5550765A (en) | 1980-04-12 |
JPS5831139B2 JPS5831139B2 (en) | 1983-07-04 |
Family
ID=14859585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53123399A Expired JPS5831139B2 (en) | 1978-10-06 | 1978-10-06 | digital signal receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5831139B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6051394A (en) * | 1983-08-31 | 1985-03-22 | Fujitsu Ltd | Composite receiver |
JPS6071398U (en) * | 1983-10-19 | 1985-05-20 | 三菱重工業株式会社 | Waste plastic film volume reduction and solidification processing equipment |
JPH01137646U (en) * | 1988-03-14 | 1989-09-20 | ||
JP2004135309A (en) * | 2002-08-28 | 2004-04-30 | Motorola Inc | Tone detector and therefor method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5115392A (en) * | 1974-07-29 | 1976-02-06 | San Bureen Kk | KAITENHYOJISOCHI |
JPS5328315A (en) * | 1976-08-30 | 1978-03-16 | Hitachi Ltd | Multi-frequency signal receiver |
-
1978
- 1978-10-06 JP JP53123399A patent/JPS5831139B2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5115392A (en) * | 1974-07-29 | 1976-02-06 | San Bureen Kk | KAITENHYOJISOCHI |
JPS5328315A (en) * | 1976-08-30 | 1978-03-16 | Hitachi Ltd | Multi-frequency signal receiver |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6051394A (en) * | 1983-08-31 | 1985-03-22 | Fujitsu Ltd | Composite receiver |
JPS6071398U (en) * | 1983-10-19 | 1985-05-20 | 三菱重工業株式会社 | Waste plastic film volume reduction and solidification processing equipment |
JPH031103Y2 (en) * | 1983-10-19 | 1991-01-14 | ||
JPH01137646U (en) * | 1988-03-14 | 1989-09-20 | ||
JP2004135309A (en) * | 2002-08-28 | 2004-04-30 | Motorola Inc | Tone detector and therefor method |
Also Published As
Publication number | Publication date |
---|---|
JPS5831139B2 (en) | 1983-07-04 |
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