FI901581A - FOERFARANDE FOER KANALBEROENDE STYRNING AV ETT SPAENNINGSSTYRT SUGFILTER I EN MOTTAGARE AV EN RADIOTELEFON. - Google Patents

FOERFARANDE FOER KANALBEROENDE STYRNING AV ETT SPAENNINGSSTYRT SUGFILTER I EN MOTTAGARE AV EN RADIOTELEFON. Download PDF

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Publication number
FI901581A
FI901581A FI901581A FI901581A FI901581A FI 901581 A FI901581 A FI 901581A FI 901581 A FI901581 A FI 901581A FI 901581 A FI901581 A FI 901581A FI 901581 A FI901581 A FI 901581A
Authority
FI
Finland
Prior art keywords
interphase
filter
sugfilter
spaenningsstyrt
radiotelefon
Prior art date
Application number
FI901581A
Other languages
Finnish (fi)
Other versions
FI86351C (en
FI901581A0 (en
FI86351B (en
Inventor
Jorma Liukkonen
Jarmo Heinonen
Torsti Poutanen
Original Assignee
Nokia Mobile Phones Ltd
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 Mobile Phones Ltd filed Critical Nokia Mobile Phones Ltd
Priority to FI901581A priority Critical patent/FI86351C/en
Publication of FI901581A0 publication Critical patent/FI901581A0/en
Publication of FI901581A publication Critical patent/FI901581A/en
Application granted granted Critical
Publication of FI86351B publication Critical patent/FI86351B/en
Publication of FI86351C publication Critical patent/FI86351C/en

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  • Noise Elimination (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

The invention concerns a method according to which an interphase filter, which suppresses a signal causing fault reproduction, is controlled dependent upon the channel in a radio telephone receiver, wherein the interphase filter is connected between the RF signal wave and the circuit earth before a first mixer and the local oscillator frequency for the mixer is generated by a phase locking circuit PLL comprising a voltage controlled oscillator VCO. According to the invention a control voltage Vohj for the interphase filter proportional to the reception frequency is taken from the control voltage line of the voltage controlled oscillator and is taken either direct to the interphase filter or to an input to a comparator 9. <IMAGE>
FI901581A 1990-03-29 1990-03-29 Method for channel dependent control of a voltage controlled suction filter in a receiver of a radio telephone FI86351C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI901581A FI86351C (en) 1990-03-29 1990-03-29 Method for channel dependent control of a voltage controlled suction filter in a receiver of a radio telephone

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI901581A FI86351C (en) 1990-03-29 1990-03-29 Method for channel dependent control of a voltage controlled suction filter in a receiver of a radio telephone
FI901581 1990-03-29

Publications (4)

Publication Number Publication Date
FI901581A0 FI901581A0 (en) 1990-03-29
FI901581A true FI901581A (en) 1991-09-30
FI86351B FI86351B (en) 1992-04-30
FI86351C FI86351C (en) 1992-08-10

Family

ID=8530153

Family Applications (1)

Application Number Title Priority Date Filing Date
FI901581A FI86351C (en) 1990-03-29 1990-03-29 Method for channel dependent control of a voltage controlled suction filter in a receiver of a radio telephone

Country Status (1)

Country Link
FI (1) FI86351C (en)

Also Published As

Publication number Publication date
FI86351C (en) 1992-08-10
FI901581A0 (en) 1990-03-29
FI86351B (en) 1992-04-30

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FG Patent granted

Owner name: NOKIA MATKAPUHELIMET OY

MA Patent expired