GB2234127B - Double superheterodyne receiver with arrangement for compensating for temperature-dependent performance characteristics of a surface acoustic wave filter - Google Patents

Double superheterodyne receiver with arrangement for compensating for temperature-dependent performance characteristics of a surface acoustic wave filter

Info

Publication number
GB2234127B
GB2234127B GB9015768A GB9015768A GB2234127B GB 2234127 B GB2234127 B GB 2234127B GB 9015768 A GB9015768 A GB 9015768A GB 9015768 A GB9015768 A GB 9015768A GB 2234127 B GB2234127 B GB 2234127B
Authority
GB
United Kingdom
Prior art keywords
compensating
arrangement
temperature
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.)
Expired - Fee Related
Application number
GB9015768A
Other versions
GB2234127A (en
GB9015768D0 (en
Inventor
Kazuya Hashimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP1184913A external-priority patent/JP2822461B2/en
Priority claimed from JP01193746A external-priority patent/JP3088105B2/en
Application filed by NEC Corp filed Critical NEC Corp
Publication of GB9015768D0 publication Critical patent/GB9015768D0/en
Publication of GB2234127A publication Critical patent/GB2234127A/en
Application granted granted Critical
Publication of GB2234127B publication Critical patent/GB2234127B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
GB9015768A 1989-07-18 1990-07-18 Double superheterodyne receiver with arrangement for compensating for temperature-dependent performance characteristics of a surface acoustic wave filter Expired - Fee Related GB2234127B (en)

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 GB9015768D0 (en) 1990-09-05
GB2234127A GB2234127A (en) 1991-01-23
GB2234127B true 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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
GB2234127A (en) 1991-01-23
GB9015768D0 (en) 1990-09-05

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980718