GB1385111A - Frequency discriminator - Google Patents
Frequency discriminatorInfo
- Publication number
- GB1385111A GB1385111A GB3614772A GB3614772A GB1385111A GB 1385111 A GB1385111 A GB 1385111A GB 3614772 A GB3614772 A GB 3614772A GB 3614772 A GB3614772 A GB 3614772A GB 1385111 A GB1385111 A GB 1385111A
- Authority
- GB
- United Kingdom
- Prior art keywords
- output
- frequency
- division
- discriminators
- discriminator
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
1385111 Analogue-digital converters MULLARD Ltd 2 Aug 1972 36147/72 Heading G4H [Also in Division H3] An apparatus producing a ten digit binary coded output B 1 -B 10 indicative of the input frequency employs a plurality of frequency discriminators D (see also Division H3) having outputs dependent on the sine and cosine functions of a frequency dependent phase angle # introduced in the discriminators. Adding and subtracting circuits in the video amplifiers produce a four level output which is sampled and stored in bi-stable stores under the control of timing circuits actuated when the input attains a certain threshold. A logic processing circuit forms the coded output from the stored values. The least significant digits B 8 -B 11 are formed from the output of the eighth discriminator while each of the more significant digits is obtained from the output of the corresponding discriminator and the three succeeding digits. The frequency of a weak back-ground signal may be measured by closing a switch S after the elapse of main pulse duration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3614772A GB1385111A (en) | 1972-08-02 | 1972-08-02 | Frequency discriminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3614772A GB1385111A (en) | 1972-08-02 | 1972-08-02 | Frequency discriminator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1385111A true GB1385111A (en) | 1975-02-26 |
Family
ID=10385431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3614772A Expired GB1385111A (en) | 1972-08-02 | 1972-08-02 | Frequency discriminator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1385111A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2492595A1 (en) * | 1980-10-20 | 1982-04-23 | Philips Nv | MOUNTING OF MICROWAVE DETECTOR |
-
1972
- 1972-08-02 GB GB3614772A patent/GB1385111A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2492595A1 (en) * | 1980-10-20 | 1982-04-23 | Philips Nv | MOUNTING OF MICROWAVE DETECTOR |
| DE3140407A1 (en) * | 1980-10-20 | 1982-06-24 | Naamloze Vennootschap Philips' Gloeilampenfabrieken, 5621 Eindhoven | MICROWAVE DETECTOR ARRANGEMENT |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |