FI873138A - AVSTAEMNINGSSYSTEM FOER EN MOTTAGARE. - Google Patents

AVSTAEMNINGSSYSTEM FOER EN MOTTAGARE. Download PDF

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Publication number
FI873138A
FI873138A FI873138A FI873138A FI873138A FI 873138 A FI873138 A FI 873138A FI 873138 A FI873138 A FI 873138A FI 873138 A FI873138 A FI 873138A FI 873138 A FI873138 A FI 873138A
Authority
FI
Finland
Prior art keywords
signal
tuning
frequency
generating
devices
Prior art date
Application number
FI873138A
Other languages
Finnish (fi)
Other versions
FI80547C (en
FI80547B (en
FI873138A0 (en
Inventor
Stanley Paul Knight
John Goodchilde Nori Henderson
Original Assignee
Rca 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 US06/302,853 external-priority patent/US4402089A/en
Application filed by Rca Corp filed Critical Rca Corp
Publication of FI873138A publication Critical patent/FI873138A/en
Publication of FI873138A0 publication Critical patent/FI873138A0/en
Application granted granted Critical
Publication of FI80547B publication Critical patent/FI80547B/en
Publication of FI80547C publication Critical patent/FI80547C/en

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  • Superheterodyne Receivers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

The invention concerns a tuning system for a receiver for the selection of a radio frequency (RF) signal from several receivable RF signals, comprising: RF devices TC-1, TC-2, LV-DTF, HV-DTF, UHF-DTF which have an adjustable frequency selective characteristic for reception of RF signals; an oscillator device L/-1 for generating an oscillator signal, the frequency of which is controlled by a first control signal for the selection of the abovementioned individual RF signal; a mixer device MX for superposing the RF-devices' RF signals and the abovementioned oscillator signal for generating an intermediate frequency IF signal with a predetermined frequency; a first control device for generating a first control signal for the selection of the abovementioned individual RF signal in such a way that the frequency of the abovementioned individual RF signal is changed to the abovementioned predetermined IF frequency by the action of the mixer device; a tuneable circuit device which is included in the RF devices for adjustment of their frequency-selective characteristics dependent upon the tuning signal and for generating the adjustment signal of the device. In order to minimize the mechanical tuning, the tuning system is characterized by devices NVM, PROM for generating a first component in the tuning signal, which first component has several values corresponding to adjacent corresponding groups of RF signals; device TC for generating a second component in the tuning signal dependent upon the selection of the abovementioned individual RF signal; devices NVM, PROM for storing the first component and excluding the second component; devices 51, 52, 53, R7, R8 for combining the first and the second components for generating a tuning signal and supplying the tuning signal to the circuit device which is to be tuned in order to achieve tuning of the frequency selective characteristic. <IMAGE>
FI873138A 1981-09-16 1987-07-15 AVSTAEMNINGSSYSTEM FOER EN MOTTAGARE. FI80547C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US30285381 1981-09-16
US06/302,853 US4402089A (en) 1981-09-16 1981-09-16 Television tuning system with electronic frequency adjustment apparatus
FI823127 1982-09-09
FI823127A FI76468C (en) 1981-09-16 1982-09-09 AVSTAEMNINGSSYSTEM FOER TELEVISION MED ELEKTRONISK FREKVENSREGLERING.

Publications (4)

Publication Number Publication Date
FI873138A true FI873138A (en) 1987-07-15
FI873138A0 FI873138A0 (en) 1987-07-15
FI80547B FI80547B (en) 1990-02-28
FI80547C FI80547C (en) 1990-06-11

Family

ID=26157375

Family Applications (1)

Application Number Title Priority Date Filing Date
FI873138A FI80547C (en) 1981-09-16 1987-07-15 AVSTAEMNINGSSYSTEM FOER EN MOTTAGARE.

Country Status (1)

Country Link
FI (1) FI80547C (en)

Also Published As

Publication number Publication date
FI80547C (en) 1990-06-11
FI80547B (en) 1990-02-28
FI873138A0 (en) 1987-07-15

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Legal Events

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MM Patent lapsed
MM Patent lapsed

Owner name: RCA LICENSING CORPORATION