GB1314659A - Wide-band ultra-linear frequency discriminator - Google Patents
Wide-band ultra-linear frequency discriminatorInfo
- Publication number
- GB1314659A GB1314659A GB866572A GB866572A GB1314659A GB 1314659 A GB1314659 A GB 1314659A GB 866572 A GB866572 A GB 866572A GB 866572 A GB866572 A GB 866572A GB 1314659 A GB1314659 A GB 1314659A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- phasemeter
- frequency discriminator
- frequency
- input
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
- H03D3/06—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators
- H03D3/14—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators by means of semiconductor devices having more than two electrodes
-
- 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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/90—Pitch determination of speech signals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Signal Processing (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Computational Linguistics (AREA)
- Networks Using Active Elements (AREA)
- Filters And Equalizers (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
1314659 Frequency discriminator COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATION CIT-ALCATEL 24 Feb 1972 [24 Feb 1971] 8665/72 Heading H3A A frequency discriminator comprises a phasemeter 6 with a linear characteristic in the range 0 to 360 degrees connected to the input 1 directly and also via a second order symmetric filter 4, there being provided an amplifier 8, e.g. an integrating amplifier between the phasemeter output and a control input of the filter. The filter 4 may be an active filter whose tuned frequency is controlled by the control voltage applied via a control circuit 13. The control voltage also obtainable as an output at terminal 14 is a unidirectional voltage varying linearly with frequency. Voltage limiters 2, 5 may be placed in the input paths of the phasemeter.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7106309A FR2126090B1 (en) | 1971-02-24 | 1971-02-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1314659A true GB1314659A (en) | 1973-04-26 |
Family
ID=9072413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB866572A Expired GB1314659A (en) | 1971-02-24 | 1972-02-24 | Wide-band ultra-linear frequency discriminator |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE779472A (en) |
DE (1) | DE2207781A1 (en) |
FR (1) | FR2126090B1 (en) |
GB (1) | GB1314659A (en) |
IT (1) | IT949184B (en) |
LU (1) | LU64814A1 (en) |
NL (1) | NL7202352A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4198609A (en) * | 1977-07-15 | 1980-04-15 | Victor Company Of Japan, Limited | Phase tracked loop frequency demodulator |
FR2485294A1 (en) * | 1980-06-23 | 1981-12-24 | Trt Telecom Radio Electr | FREQUENCY DEMODULATOR USING A VARIABLE DELAY CIRCUIT WITH RECEIVED FREQUENCY |
-
1971
- 1971-02-24 FR FR7106309A patent/FR2126090B1/fr not_active Expired
-
1972
- 1972-02-17 BE BE779472A patent/BE779472A/en unknown
- 1972-02-18 DE DE19722207781 patent/DE2207781A1/en active Pending
- 1972-02-21 LU LU64814D patent/LU64814A1/xx unknown
- 1972-02-23 IT IT6756972A patent/IT949184B/en active
- 1972-02-23 NL NL7202352A patent/NL7202352A/xx unknown
- 1972-02-24 GB GB866572A patent/GB1314659A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL7202352A (en) | 1972-08-28 |
LU64814A1 (en) | 1972-12-05 |
IT949184B (en) | 1973-06-11 |
FR2126090A1 (en) | 1972-10-06 |
FR2126090B1 (en) | 1974-02-15 |
BE779472A (en) | 1972-08-17 |
DE2207781A1 (en) | 1972-08-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |