IT1136820B - SPECTRUM ANALYZER CONSTITUTED BY A DIGITAL FUEL IN REPLACEMENT OF AN ANALOG FILTER - Google Patents
SPECTRUM ANALYZER CONSTITUTED BY A DIGITAL FUEL IN REPLACEMENT OF AN ANALOG FILTERInfo
- Publication number
- IT1136820B IT1136820B IT20349/81A IT2034981A IT1136820B IT 1136820 B IT1136820 B IT 1136820B IT 20349/81 A IT20349/81 A IT 20349/81A IT 2034981 A IT2034981 A IT 2034981A IT 1136820 B IT1136820 B IT 1136820B
- Authority
- IT
- Italy
- Prior art keywords
- filter
- spectrum analyzer
- replacement
- fed
- analog filter
- Prior art date
Links
- 238000001228 spectrum Methods 0.000 title abstract 2
- 239000000446 fuel Substances 0.000 title 1
- 238000010183 spectrum analysis Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
- G01R23/165—Spectrum analysis; Fourier analysis using filters
- G01R23/167—Spectrum analysis; Fourier analysis using filters with digital filters
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Computational Linguistics (AREA)
- Mathematical Physics (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Analogue/Digital Conversion (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
A spectrum analyzer, e.g., for telecommunication application, includes an input A to D converter (AD) for converting an input analog signal to corresponding binary words, these words then being fed via a buffer (PS) and a multiplexer (MX) to a digital filter (DF). Under the action of a control circuit (CS) the filter (DF) is fed with a series of different submultiples of a clock signal. For each submultiples the filter (DF) is also fed into a corresponding set of filter constants from a memory (PF). Spectrum analysis is made by changing the frequency of the clock submultiple signal to the filter and simultaneously supplying the corresponding filter constants from the memory while ensuring that the centre frequency of the filter passband remains constant. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803009785 DE3009785A1 (en) | 1980-03-14 | 1980-03-14 | SPECTRAL ANALYZER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT8120349A0 IT8120349A0 (en) | 1981-03-16 |
| IT1136820B true IT1136820B (en) | 1986-09-03 |
Family
ID=6097180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT20349/81A IT1136820B (en) | 1980-03-14 | 1981-03-16 | SPECTRUM ANALYZER CONSTITUTED BY A DIGITAL FUEL IN REPLACEMENT OF AN ANALOG FILTER |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS56145365A (en) |
| DE (1) | DE3009785A1 (en) |
| FR (1) | FR2478355A1 (en) |
| GB (1) | GB2075693B (en) |
| IT (1) | IT1136820B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69124092T2 (en) * | 1991-07-16 | 1997-07-03 | Wavetek Gmbh | Method for determining the frequency of a dominant signal in an input signal |
| EP1592136B1 (en) | 2004-04-21 | 2012-07-11 | St Microelectronics S.A. | Adaptive demodulator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2074813A1 (en) * | 1970-01-30 | 1971-10-08 | Lannionnais Electronique |
-
1980
- 1980-03-14 DE DE19803009785 patent/DE3009785A1/en not_active Withdrawn
-
1981
- 1981-03-05 GB GB8107016A patent/GB2075693B/en not_active Expired
- 1981-03-13 JP JP3546181A patent/JPS56145365A/en active Pending
- 1981-03-13 FR FR8105034A patent/FR2478355A1/en active Granted
- 1981-03-16 IT IT20349/81A patent/IT1136820B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| GB2075693A (en) | 1981-11-18 |
| IT8120349A0 (en) | 1981-03-16 |
| JPS56145365A (en) | 1981-11-12 |
| FR2478355A1 (en) | 1981-09-18 |
| GB2075693B (en) | 1983-09-21 |
| DE3009785A1 (en) | 1981-10-01 |
| FR2478355B1 (en) | 1984-12-28 |
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