SE8704385L - A CONVERSION CONTROLLING CONNECTOR FOR A PHONE SYNTHETIC DETAILED FOR A PHONE SYSTEM - Google Patents

A CONVERSION CONTROLLING CONNECTOR FOR A PHONE SYNTHETIC DETAILED FOR A PHONE SYSTEM

Info

Publication number
SE8704385L
SE8704385L SE8704385A SE8704385A SE8704385L SE 8704385 L SE8704385 L SE 8704385L SE 8704385 A SE8704385 A SE 8704385A SE 8704385 A SE8704385 A SE 8704385A SE 8704385 L SE8704385 L SE 8704385L
Authority
SE
Sweden
Prior art keywords
synthesizer
voltage
crystal oscillator
controlled
phone
Prior art date
Application number
SE8704385A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE467642B (en
SE8704385D0 (en
Inventor
T Poutanen
Original Assignee
Nokia Mobira Oy
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
Application filed by Nokia Mobira Oy filed Critical Nokia Mobira Oy
Publication of SE8704385D0 publication Critical patent/SE8704385D0/en
Publication of SE8704385L publication Critical patent/SE8704385L/en
Publication of SE467642B publication Critical patent/SE467642B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers
    • H03J7/065—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers the counter or frequency divider being used in a phase locked loop

Abstract

A control method for the carrier wave of the FM synthesizer for a radio telephone system and a corresponding circuit with a processor (16), a crystal oscillator (15) in the processor, a digital/analog converter (18) and a counter (14) and with connection to the control voltage (Vohj) of the voltage-controlled synthesizer crystal oscillator (1) and with connection to the synthesizer intermediate frequency (IF2), the voltage-controlled synthesizer crystal oscillator (1) being controlled in this circuit by locking (synchronising) to the carrier frequency (fin) of the signal transmitted by the base station and received. In the circuit, the telephone processor (16) uses the counter (14) to count periods of the receiver intermediate-frequency signal (IF2) during the constant time T and obtains as a result a particular number (M) which is subjected to digital/analog conversion, the voltage obtained being used for controlling the voltage-controlled crystal oscillator (1) of the synthesizer. In the locked state, the control number (M) does not change with different counts. <IMAGE>
SE8704385A 1986-12-01 1987-11-10 METHOD AND CONNECTION FOR EMERGENCY REGULATION OF FM SYNTHETISATOR IN RADIO PHONE SYSTEM SE467642B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI864909A FI79636C (en) 1986-12-01 1986-12-01 EN BAERVAOGSREGLERANDE KOPPLING AV EN FOER EN RADIOTELEFONANORDNING AVSEDD FM-SYNTETISATOR.

Publications (3)

Publication Number Publication Date
SE8704385D0 SE8704385D0 (en) 1987-11-10
SE8704385L true SE8704385L (en) 1988-06-02
SE467642B SE467642B (en) 1992-08-17

Family

ID=8523587

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8704385A SE467642B (en) 1986-12-01 1987-11-10 METHOD AND CONNECTION FOR EMERGENCY REGULATION OF FM SYNTHETISATOR IN RADIO PHONE SYSTEM

Country Status (5)

Country Link
DE (1) DE3738124C2 (en)
DK (1) DK626887A (en)
FI (1) FI79636C (en)
NO (1) NO172418C (en)
SE (1) SE467642B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI85636C (en) * 1988-08-19 1992-05-11 Nokia Mobira Oy Procedure and switching for automatic, based on a calculator based on the frequency of a radio telephone
JPH07105822B2 (en) * 1989-08-10 1995-11-13 三菱電機株式会社 Automatic frequency controller
US5107522A (en) * 1990-02-05 1992-04-21 Sharp Kabushiki Kaisha Automatic frequency control circuit
US5289506A (en) * 1990-02-05 1994-02-22 Sharp Kabushiki Kaisha Automatic frequency control circuit
US5493700A (en) * 1993-10-29 1996-02-20 Motorola Automatic frequency control apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229741A (en) * 1979-03-12 1980-10-21 Motorola, Inc. Two-way communications system and method of synchronizing
DE3216631C2 (en) * 1982-05-04 1984-07-12 Siemens AG, 1000 Berlin und 8000 München Oscillator circuit
GB8428159D0 (en) * 1984-11-07 1984-12-12 Sinclair Res Ltd Radio frequency synthesis

Also Published As

Publication number Publication date
FI864909A0 (en) 1986-12-01
FI864909A (en) 1988-06-02
SE467642B (en) 1992-08-17
NO874934L (en) 1988-06-02
DK626887D0 (en) 1987-11-30
NO172418C (en) 1993-07-14
DK626887A (en) 1988-06-02
FI79636B (en) 1989-09-29
NO172418B (en) 1993-04-05
NO874934D0 (en) 1987-11-26
DE3738124C2 (en) 1998-11-12
FI79636C (en) 1990-01-10
DE3738124A1 (en) 1988-06-16
SE8704385D0 (en) 1987-11-10

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