JPS5444459A - Delay detector for digital angular modulation wave - Google Patents
Delay detector for digital angular modulation waveInfo
- Publication number
- JPS5444459A JPS5444459A JP11046077A JP11046077A JPS5444459A JP S5444459 A JPS5444459 A JP S5444459A JP 11046077 A JP11046077 A JP 11046077A JP 11046077 A JP11046077 A JP 11046077A JP S5444459 A JPS5444459 A JP S5444459A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- frequency
- modulation wave
- gate
- 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.)
- Granted
Links
Abstract
PURPOSE: To obtain most suited detection performance even with the variation in the center frequency of modulation waves, by detecting the DC component of the pjase comparator output depending on the balancing part of the digital signal demodulated and by controlling the frequency of the local oscillator.
CONSTITUTION: After the modulation wave from the input 201 is frequency-converted, the signal delayed with the delay circuit 204 and the modulation wave are phase-compared 205, and threshold discrimination is made with the voltage comparator 207. The output is sampled with FF 209, and the decoded digital output is fed from the output line 210 and also, the signal delaying by one clock with FF 213 is inputted to the NOR gate 214 and the gate signal 306 constituting "1" only for the balancing part of the two codes adjacent is outputted. The DC signal separated from LPF 206 is sample-held 212, the analog gate 215 is passed through when the signal 306 is at "1", and the frequency is automatically adjusted by controlling the voltage controlled oscillator 218 from the integration value 216. Thus, the output center frequency of the mixer 202 is kept constant by this and excellent detection performance can be obtained.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11046077A JPS5444459A (en) | 1977-09-16 | 1977-09-16 | Delay detector for digital angular modulation wave |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11046077A JPS5444459A (en) | 1977-09-16 | 1977-09-16 | Delay detector for digital angular modulation wave |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5444459A true JPS5444459A (en) | 1979-04-07 |
JPS5750107B2 JPS5750107B2 (en) | 1982-10-26 |
Family
ID=14536263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11046077A Granted JPS5444459A (en) | 1977-09-16 | 1977-09-16 | Delay detector for digital angular modulation wave |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5444459A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57135556A (en) * | 1981-02-16 | 1982-08-21 | Fujitsu Ltd | Delay detecting circuit |
US4538112A (en) * | 1982-08-30 | 1985-08-27 | Wang Laboratories, Inc. | Detector using delayed and undelayed inputs for demodulating FM or PM signals |
JPH0427249A (en) * | 1990-05-22 | 1992-01-30 | Nec Corp | Demodulating device |
JPH04356802A (en) * | 1991-01-14 | 1992-12-10 | Daiwa House Ind Co Ltd | Antenna guy wire lock fitting |
-
1977
- 1977-09-16 JP JP11046077A patent/JPS5444459A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57135556A (en) * | 1981-02-16 | 1982-08-21 | Fujitsu Ltd | Delay detecting circuit |
US4538112A (en) * | 1982-08-30 | 1985-08-27 | Wang Laboratories, Inc. | Detector using delayed and undelayed inputs for demodulating FM or PM signals |
JPH0427249A (en) * | 1990-05-22 | 1992-01-30 | Nec Corp | Demodulating device |
JPH04356802A (en) * | 1991-01-14 | 1992-12-10 | Daiwa House Ind Co Ltd | Antenna guy wire lock fitting |
Also Published As
Publication number | Publication date |
---|---|
JPS5750107B2 (en) | 1982-10-26 |
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