GB1364940A - Frequency modulation transmission system - Google Patents
Frequency modulation transmission systemInfo
- Publication number
- GB1364940A GB1364940A GB1197273A GB1197273A GB1364940A GB 1364940 A GB1364940 A GB 1364940A GB 1197273 A GB1197273 A GB 1197273A GB 1197273 A GB1197273 A GB 1197273A GB 1364940 A GB1364940 A GB 1364940A
- Authority
- GB
- United Kingdom
- Prior art keywords
- information signal
- frequency
- period
- counter
- frequency modulation
- 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
Landscapes
- Measuring Frequencies, Analyzing Spectra (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
1364940 Frequency modulation transmission system PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 13 March 1973 [16 March 1972] 11972/73 Heading G4H In a system for transmitting as frequency modulation discrete instantaneous values of an information signal and demodulating the modulated signal at a receiver by a counter which counts pulses derived from the transmission for the period between regular pulses which reset the counter, the counter reading at the end of the period being the desired value, there is arranged before the frequency modulator a transmission network with substantially frequency independent time delay up to the highest frequency of the information signal and an amplitude characteristic A b (f) given by where A 0 is the attenuation for f=O and T 0 is the time spacing of the reset pulses and is less than the period of the highest frequency of the information signal. The information signal may be converted to an electrical signal by a transducer with the desired characteristic or the electrical transducer output may be modified by an electrical network which is preferably four terminal and may incorporate an amplifier. A suitable network is shown in Fig. 2. R and R 1 are related to A 0 by the equation A 0 = R/R 1 + R and L and C are given by and
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722212754 DE2212754A1 (en) | 1972-03-16 | 1972-03-16 | DEVICE FOR TRANSFERRING DISCRETE MOMENTAL VALUES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1364940A true GB1364940A (en) | 1974-10-02 |
Family
ID=5839125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1197273A Expired GB1364940A (en) | 1972-03-16 | 1973-03-13 | Frequency modulation transmission system |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS495062A (en) |
| AU (1) | AU5320373A (en) |
| DE (1) | DE2212754A1 (en) |
| FR (1) | FR2176449A5 (en) |
| GB (1) | GB1364940A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5082927A (en) * | 1973-11-24 | 1975-07-04 | ||
| JPS5746268B2 (en) * | 1973-12-14 | 1982-10-02 | ||
| JPS5831790B2 (en) * | 1973-12-26 | 1983-07-08 | ソニー株式会社 | printer |
| JPS50156320A (en) * | 1974-06-05 | 1975-12-17 | ||
| JPS55276A (en) * | 1979-03-07 | 1980-01-05 | Oki Electric Ind Co Ltd | High-speed printing device |
| US4751530A (en) * | 1986-12-19 | 1988-06-14 | Xerox Corporation | Acoustic lens arrays for ink printing |
-
1972
- 1972-03-16 DE DE19722212754 patent/DE2212754A1/en active Pending
-
1973
- 1973-03-12 AU AU53203/73A patent/AU5320373A/en not_active Expired
- 1973-03-13 GB GB1197273A patent/GB1364940A/en not_active Expired
- 1973-03-14 JP JP2990573A patent/JPS495062A/ja active Pending
- 1973-03-15 FR FR7309359A patent/FR2176449A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS495062A (en) | 1974-01-17 |
| FR2176449A5 (en) | 1973-10-26 |
| DE2212754A1 (en) | 1973-09-20 |
| AU5320373A (en) | 1974-09-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |