GB1331344A - Phase modulators - Google Patents
Phase modulatorsInfo
- Publication number
- GB1331344A GB1331344A GB2240871A GB2240871A GB1331344A GB 1331344 A GB1331344 A GB 1331344A GB 2240871 A GB2240871 A GB 2240871A GB 2240871 A GB2240871 A GB 2240871A GB 1331344 A GB1331344 A GB 1331344A
- Authority
- GB
- United Kingdom
- Prior art keywords
- modulators
- phase
- series
- modulation voltage
- fed
- 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
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/10—Angle modulation by means of variable impedance
- H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
- H03C3/22—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/18—Networks for phase shifting
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C2200/00—Indexing scheme relating to details of modulators or modulation methods covered by H03C
- H03C2200/0037—Functional aspects of modulators
- H03C2200/0079—Measures to linearise modulation or reduce distortion of modulation characteristics
Landscapes
- Amplitude Modulation (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
1331344 Phase modulators SIEMENS AG 19 April 1971 [18 March 1970] 22408/71 Heading H3R A phase modulator comprises a bridged T circuit matched at its input to a carrier source U Q and at its output to a load R and including the primary portion of a centre-tapped autotransformer across whose ends two capacitance elements V 1 , V 2 , at least one of which is a varactor to which a modulation voltage and a bias voltage are supplied, are series connected and a shunt arm containing a resistor R3. In the embodiment of Fig. 6 (not shown) two modulators such as shown in Fig. 1 are connected in cascade and arranged to receive the same modulation voltage but are stagger tuned by different bias voltages so as to obtain a larger range of phase shift with good linearity. Alternatively for a radio relay system, two modulators are connected in series with the service conversation channel being fed to one and the AF channels being separately fed to the other modulator.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2012922A DE2012922B2 (en) | 1970-03-18 | 1970-03-18 | Phase modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1331344A true GB1331344A (en) | 1973-09-26 |
Family
ID=5765488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2240871A Expired GB1331344A (en) | 1970-03-18 | 1971-04-19 | Phase modulators |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5125301B1 (en) |
| AT (1) | AT309531B (en) |
| BE (1) | BE764452A (en) |
| DE (1) | DE2012922B2 (en) |
| FR (1) | FR2083370B1 (en) |
| GB (1) | GB1331344A (en) |
| NL (1) | NL151586B (en) |
| SE (1) | SE362557B (en) |
| YU (1) | YU36247B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2536393B2 (en) * | 1993-05-07 | 1996-09-18 | 日本電気株式会社 | Phase modulator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE511040A (en) * | 1951-06-01 | |||
| FR1066187A (en) * | 1952-06-27 | 1954-06-02 | Thomson Houston Comp Francaise | Variable phase shift networks |
| GB1239596A (en) * | 1968-01-19 | 1971-07-21 |
-
1970
- 1970-03-18 DE DE2012922A patent/DE2012922B2/en active Granted
-
1971
- 1971-03-09 YU YU581/71A patent/YU36247B/en unknown
- 1971-03-16 AT AT226871A patent/AT309531B/en not_active IP Right Cessation
- 1971-03-17 NL NL717103579A patent/NL151586B/en not_active IP Right Cessation
- 1971-03-17 FR FR7109267A patent/FR2083370B1/fr not_active Expired
- 1971-03-17 SE SE03436/71A patent/SE362557B/xx unknown
- 1971-03-18 JP JP46015475A patent/JPS5125301B1/ja active Pending
- 1971-03-18 BE BE764452A patent/BE764452A/en unknown
- 1971-04-19 GB GB2240871A patent/GB1331344A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT309531B (en) | 1973-08-27 |
| DE2012922C3 (en) | 1974-08-22 |
| NL151586B (en) | 1976-11-15 |
| SE362557B (en) | 1973-12-10 |
| BE764452A (en) | 1971-08-16 |
| DE2012922A1 (en) | 1971-10-14 |
| DE2012922B2 (en) | 1974-01-31 |
| FR2083370A1 (en) | 1971-12-17 |
| FR2083370B1 (en) | 1975-03-21 |
| YU58171A (en) | 1981-06-30 |
| NL7103579A (en) | 1971-09-21 |
| YU36247B (en) | 1982-02-25 |
| JPS5125301B1 (en) | 1976-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |