JPS6439855A - Surface acoustic wave device - Google Patents
Surface acoustic wave deviceInfo
- Publication number
- JPS6439855A JPS6439855A JP62194548A JP19454887A JPS6439855A JP S6439855 A JPS6439855 A JP S6439855A JP 62194548 A JP62194548 A JP 62194548A JP 19454887 A JP19454887 A JP 19454887A JP S6439855 A JPS6439855 A JP S6439855A
- Authority
- JP
- Japan
- Prior art keywords
- output
- phase
- input
- acoustic wave
- surface acoustic
- 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
Landscapes
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:To miniaturize the titled device, and to reduce its cost by connecting a pair of output/input terminals of two channels having an output/an input whose delay phase differences are different by about 90 deg. from each other against the input/output, to a phase inversion switching circuit, respectively. CONSTITUTION:A carrier signal IN is converted to a surface acoustic wave by cross finger-like electrodes 11, 12 for input. Cross finger-like electrodes 13, 14 for output are arranged so that delay phases are shifted by 90 deg. from each other, and its output is provided as a balanced type output to phase inversion switching circuits 15, 16, respectively. In the phase inversion switching circuits 15, 16, respectively, a switching modulation is executed by data signals DATA1, DATA2, and a modulating signal for QPSK is obtained in output terminals 17, 18, respectively. In such a way, by generating the signals of 0 deg. phase and 90 deg. phase by a surface acoustic wave delay line, and switching them by its post-stage, the modulating signal for QPSK is obtained. In such a way, the system can be miniaturized and its cost can be reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62194548A JPS6439855A (en) | 1987-08-05 | 1987-08-05 | Surface acoustic wave device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62194548A JPS6439855A (en) | 1987-08-05 | 1987-08-05 | Surface acoustic wave device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6439855A true JPS6439855A (en) | 1989-02-10 |
Family
ID=16326367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62194548A Pending JPS6439855A (en) | 1987-08-05 | 1987-08-05 | Surface acoustic wave device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6439855A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5964911A (en) * | 1982-10-06 | 1984-04-13 | Nippon Telegr & Teleph Corp <Ntt> | Surface acoustic wave variable phase shifter |
JPS6030654B2 (en) * | 1980-12-31 | 1985-07-17 | 株式会社林原生物化学研究所 | Method for producing human colony stimulating factor |
-
1987
- 1987-08-05 JP JP62194548A patent/JPS6439855A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6030654B2 (en) * | 1980-12-31 | 1985-07-17 | 株式会社林原生物化学研究所 | Method for producing human colony stimulating factor |
JPS5964911A (en) * | 1982-10-06 | 1984-04-13 | Nippon Telegr & Teleph Corp <Ntt> | Surface acoustic wave variable phase shifter |
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