GB9015768D0 - Arrangement of compensating for temperature dependent performance characteristics of surface acoustic wave filter - Google Patents
Arrangement of compensating for temperature dependent performance characteristics of surface acoustic wave filterInfo
- Publication number
- GB9015768D0 GB9015768D0 GB909015768A GB9015768A GB9015768D0 GB 9015768 D0 GB9015768 D0 GB 9015768D0 GB 909015768 A GB909015768 A GB 909015768A GB 9015768 A GB9015768 A GB 9015768A GB 9015768 D0 GB9015768 D0 GB 9015768D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- compensating
- arrangement
- acoustic wave
- surface acoustic
- wave filter
- 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
- 230000001419 dependent effect Effects 0.000 title 1
- 238000010897 surface acoustic wave method Methods 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
- H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
- H03L1/022—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature
- H03L1/026—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature by using a memory for digitally storing correction values
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J3/00—Continuous tuning
- H03J3/02—Details
- H03J3/04—Arrangements for compensating for variations of physical values, e.g. temperature
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
- H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
- H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
- H03J5/0281—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer the digital values being held in an auxiliary non erasable memory
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Superheterodyne Receivers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1184913A JP2822461B2 (en) | 1989-07-18 | 1989-07-18 | Temperature characteristic compensation method for SAW intermediate frequency filter |
JP01193746A JP3088105B2 (en) | 1989-07-26 | 1989-07-26 | Temperature characteristic compensation method for SAW filter |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9015768D0 true GB9015768D0 (en) | 1990-09-05 |
GB2234127A GB2234127A (en) | 1991-01-23 |
GB2234127B GB2234127B (en) | 1994-06-01 |
Family
ID=26502787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9015768A Expired - Fee Related GB2234127B (en) | 1989-07-18 | 1990-07-18 | Double superheterodyne receiver with arrangement for compensating for temperature-dependent performance characteristics of a surface acoustic wave filter |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2234127B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05130156A (en) * | 1991-11-08 | 1993-05-25 | Nec Corp | Orthogonal modulator |
JP2000286737A (en) * | 1999-03-30 | 2000-10-13 | Kokusai Electric Co Ltd | Amplifier |
EP1137178A1 (en) * | 2000-03-22 | 2001-09-26 | Infineon Technologies AG | Circuit comprising a filter and method for operating a circuit comprising a filter |
-
1990
- 1990-07-18 GB GB9015768A patent/GB2234127B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
GB2234127B (en) | 1994-06-01 |
GB2234127A (en) | 1991-01-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19980718 |