JPS56131207A - High frequency phase modulator - Google Patents
High frequency phase modulatorInfo
- Publication number
- JPS56131207A JPS56131207A JP3346880A JP3346880A JPS56131207A JP S56131207 A JPS56131207 A JP S56131207A JP 3346880 A JP3346880 A JP 3346880A JP 3346880 A JP3346880 A JP 3346880A JP S56131207 A JPS56131207 A JP S56131207A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- carrier
- components
- signals
- det1
- 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.)
- Pending
Links
- 102000012677 DET1 Human genes 0.000 abstract 3
- 101150113651 DET1 gene Proteins 0.000 abstract 3
- 102100032919 Chromobox protein homolog 1 Human genes 0.000 abstract 2
- 101000797584 Homo sapiens Chromobox protein homolog 1 Proteins 0.000 abstract 2
- 102100030988 Angiotensin-converting enzyme Human genes 0.000 abstract 1
- 101150066284 DET2 gene Proteins 0.000 abstract 1
- 101000873780 Homo sapiens m7GpppN-mRNA hydrolase Proteins 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 108010083141 dipeptidyl carboxypeptidase Proteins 0.000 abstract 1
- 102100035860 m7GpppN-mRNA hydrolase Human genes 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/02—Details
Abstract
PURPOSE:To keep carrier leakage reduced all the time by substantially eliminating the carrier leakage by feeding back to a phase modulator the output generated by detecting the carrier leakage. CONSTITUTION:A carrier signal is partially led out of directional coupler DCP1 and after phase shifting PS, hybrid circuit HB3 obtains mutually 90 deg. out-of-phase signals as synchronizing signal of synchronous detectors DET1 and DET2. On the other hand, a modulated signal led out from the output side of a modulator via DCP2 is separated by HB4 into in-phase components, which are applied to DET1 and 2 to obtain detection output signals. However, if carrier leakage is occurring at output terminal OUT of the modulator, signals appear at the outputs of DET1 and 2. From those signals, AC components are moved by LPF1 and 2 and DC components are amplified and applied to modulators MOD1 and MOD2. So that the leaking carrier at terminal OUT will be out of phase with the DC components applied to MOD1 and 2 and equal in amplitude, the circuit is adjusted, canceling the leaking carrier component to zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3346880A JPS56131207A (en) | 1980-03-18 | 1980-03-18 | High frequency phase modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3346880A JPS56131207A (en) | 1980-03-18 | 1980-03-18 | High frequency phase modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56131207A true JPS56131207A (en) | 1981-10-14 |
Family
ID=12387372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3346880A Pending JPS56131207A (en) | 1980-03-18 | 1980-03-18 | High frequency phase modulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56131207A (en) |
-
1980
- 1980-03-18 JP JP3346880A patent/JPS56131207A/en active Pending
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