DK163087B - FREQUENCY TRANSMITTER WITH SCRAPBAND OSCILLATOR - Google Patents

FREQUENCY TRANSMITTER WITH SCRAPBAND OSCILLATOR Download PDF

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Publication number
DK163087B
DK163087B DK034886A DK34886A DK163087B DK 163087 B DK163087 B DK 163087B DK 034886 A DK034886 A DK 034886A DK 34886 A DK34886 A DK 34886A DK 163087 B DK163087 B DK 163087B
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Prior art keywords
frequency
signal
oscillator
coupler
signals
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DK034886A
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Danish (da)
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DK163087C (en
DK34886D0 (en
DK34886A (en
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Guenther Zehelein
Juergen Magnus
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Ant Nachrichtentech
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    • 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
    • H03J5/24—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H03J5/244—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/003—Circuit elements of oscillators
    • H03B2200/0048—Circuit elements of oscillators including measures to switch the frequency band, e.g. by harmonic selection
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0017—Intermediate frequency filter

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
  • Amplifiers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

1. A frequency converter, comprising a mixer (M) having one input for an oscillator signal (OS), another input for a high frequency signal (HF) and two outputs (1, 2) at which two intermediate frequency partial signals (ZF1, ZF2) that are out of phase with one another and produced by the mixing are present, and comprising a coupler (K) connected to the mixer outputs, which superimposes the two intermediate frequency partial signals at one of its two outputs (3, 4) in phase with one another and is closed off at its other output with an adaptation resistor, wherein the image frequency signals generated in the mixer assume opposite phase positions and compensate for on another, characterized in that the intermediate frequency partial signals, (ZF1, ZF2) are produced by upward mixing, whenever the frequency (fHF ) of the high-frequency signal (HF) is located in a lower range of the frequency band, in which the high-frequency signal can assume any arbitrary frequency ; that the intermediate frequency partial signals (ZF1, ZF2) are produced by downward mixing, whenever the frequency fHF of the high-frequency signal (HF) is located in an upper range of said frequency band, wherein for the upward mixing, the oscillator signal (OS) is tuned to a frequency fOS which is above the frequency fHF of the high-frequency signal, so that in each case the difference between the oscillator frequency fOS and the frequency fHF of the high-frequency signal has a fixedly predetermined value, and for the downward mixing the oscillator signal (OS) is tuned to a frequency fOS such as to be below the frequency fHF of the high-frequency signal, so that the difference between the frequency fHF of the high-frequency signal and the oscillator frequency fOS in each case has the same fixedly predetermined value ; and that connected to the two outputs (3, 4) of the coupler (K) is a switch (S), which switches through whichever one of the coupler outputs (3, 4) at which the intermediate frequency signal (ZF) produced by the in-phase superposition of the intermediate frequency partial signals (ZF1, ZF2) is present, and connects the adaptation resistor to the other coupler output.

Description

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DK 163087 BDK 163087 B

Den foreliggende opfindelse angår en frekvensomsætter med et blandingstrin med en indgang for et oscillatorsignal, en anden indgang for et høj frekvenssignal og to udgange, over hvilke der ligger to ved blandingen 5 opståede, indbyrdes faseforskudte mellemfrekvensdelsig-naler, og med en blandingstrinudgangene tilsluttet kobler, som på én af sine to udgange overlejrer de to mel-lemfrekvensdelsignaler i samme fase og på sin anden udgang er afsluttet med en tilpasningsmodstand, hvorhos de 10 i blandingstrinnet frembragte, til spejlfrekvenssignaler svarende, mellemfrekvenssignaler indtager modsatte fasebeliggenheder og kompenserer hinanden indbyrdes. De spejlfrekvenssignaler, som frembringer mellemfrekvenssignaler i blandingstrinnet, har en frekvens f'jjj. = fgg 15 + fZF, når det ønskede HF-signal har en frekvens fjjp = ^OS " fZF °9 f,HF = f0S " fZF, n^r fHF ~ f0S + fZF*The present invention relates to a frequency converter having a mixing stage having an input for an oscillator signal, a second input for a high frequency signal, and two outputs over which there are two intermittent phase-shifted intermediate frequency sub-signals, and with a mixing stage outputs connected to it. which at one of its two outputs superimposes the two intermediate frequency sub-signals in the same phase and at its second output is terminated by an adaptive resistor, in which the 10 produced in the mixing stage correspond to mirror frequency signals, occupy opposite phase locations and compensate for each other. The mirror frequency signals which produce intermediate frequency signals in the mixing step have a frequency fjjj. = fgg 15 + fZF when the desired HF signal has a frequency fjjp = ^ OS "fZF ° 9 f, HF = f0S" fZF, n ^ r fHF ~ f0S + fZF *

En sådan frekvensomsætter kendes fra USA-patent- skrift nr. 3 831 097. Den frekvensomsætter, som fremgår af dette skrift, anvender en 90°-3dB-kobler til at kom-20 binere to indbyrdes 90° faseforskudte mellemfrekvens-delsignaler, men benytter ikke en omskiftning mellem opad- og nedadblanding. Følgelig skal oscillatorfrekvensens afstemningsområde svare til frekvensområdet for det ønskede høj frekvenssignal.Such a frequency converter is known from US Patent No. 3,831,097. The frequency converter shown in this specification uses a 90 ° -3dB coupler to combine two mutually 90 ° phase-shifted intermediate frequency sub-signals but uses not an up and down mix. Accordingly, the tuning range of the oscillator frequency must correspond to the frequency range of the desired high frequency signal.

25 Her gås der imidlertid ud fra en højfrekvensmod tager til modtagelse af signaler med forskellige frekvenser, som ligger inden for et forudbestemt frekvensbånd. Disse forskellige modtagesignalfrekvenser skal omsættes til en konstant mellemfrekvens, som er egnet til 30 d emodulat ion.25 Here, however, a high-frequency mode receiver is assumed to receive signals of different frequencies which are within a predetermined frequency band. These different receive signal frequencies must be converted to a constant intermediate frequency suitable for 30 d emodulat ion.

Fra dansk patent nr. 50828 er det i og for sig kendt at frembringe et mellemfrekvens signal ved enten opad- eller nedadblanding af et højfrekvenssignal med et oscillatorsignal. Desuden angives foranstaltninger til 35 at undertrykke de ved blandingen opståede spejlfrekvenssignaler .From Danish Patent No. 50828, it is known per se to produce an intermediate frequency signal by either upward or downward mixing of a high frequency signal with an oscillator signal. In addition, measures are provided to suppress the mirror frequency signals generated by the mixture.

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Opfindelsen har nu til opgave at angive en frekvensomsætter af den indledningsvis omhandlede art, som er i stand til at omsætte forskellige signalfrekvenser til en fast forudbestemt mellemfrekvens, hvorhos den til 5 omsætningen nødvendige oscillatorfrekvens kun skal kunne afstemmes indenfor et frekvensområde, som er så smalt som muligt.It is the object of the invention to provide a frequency converter of the kind initially referred to, which is capable of converting various signal frequencies to a fixed predetermined intermediate frequency, whereby the oscillator frequency needed for the conversion can only be tuned within a frequency range as narrow as possible.

Ifølge opfindelsen løses denne oppgave med de i krav l's kendetegnende del angivne træk.According to the invention, this problem is solved by the features of claim 1.

10 Hensigtsmæssige udformninger af opfindelsen frem går af underkravene.Suitable embodiments of the invention appear from the subclaims.

Som følge af, at den til grund for denne opfindelse liggende frekvensomsætter kun kræver et smalt afstemningsområde for oscill3torfrekvensen, forenkles 15 kredsløbene for oscillatoren og andre efterfølgende funktionsenheder, f.eks. frekvensmultiplikatorer.Because the frequency converter underlying this invention requires only a narrow tuning range for the oscillator frequency, the circuits of the oscillator and other subsequent functional units, e.g. frequency multipliers.

Opfindelsen er i det følgende forklaret nærmere på grundlag af et på tegningen vist udførelseseksempel.The invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawing.

Den på tegningen viste frekvensomsætter har et 20 blandingstrin M, på hvis ene indgang der ligger et modtaget højfrekvenssignal HF, og på hvis anden indgang der ligger et oscillatorsignal OS. Oscillatorsignalet OS kommer fra en oscillator 0, som kan afstemmes med hensyn til frekvensen, og det når over en 25 frekvensmultiplikator FV frem til blandingstrinnet M.The frequency converter shown in the drawing has a mixing step M, on which one input there is a received high frequency signal HF and on whose other input there is an oscillator signal OS. The oscillator signal OS comes from an oscillator 0, which can be tuned for frequency, and it reaches over a frequency multiplier FV to the mixing stage M.

Blandingstrinnet M er et symmetrisk modtakt- blandingstrin, som over to udgange 1 og 2 leverer to mellemfrekvensdelsignaler ZF1 og ZF2, som er opstået 30 ved blandingen af oscillatorfrekvensen fos med højfrekvenssignalet HF's frekvens fHF, °9 som ^ar lige store amplituder men er faseforskudt 90° i forhold til hinanden.Mixing step M is a symmetric receive mixing step which delivers two intermediate frequency sub-signals ZF1 and ZF2 generated by mixing the oscillator frequency fos with the high frequency signal HF's frequency fHF, ° 9 which is equal to amplitude, but is 90 ° in relation to each other.

I blandingstrinnet M's udgange 1 og 2 er 35 der tilsluttet en 90°-3dB-kobler K. Denne 3-dB-kobler K overlejrer de i forhold til hinanden 90° faseforskud- 3In the mixing stage M's outputs 1 and 2, a 90 ° -3dB coupler K. is connected. This 3-dB coupler K overlays the 90 ° phase advance relative to each other.

DK 163087 BDK 163087 B

te mellemfrekvensdelsignaler ZF1 og ZF2 ^på en af sine udgange 3 eller 4 og bevirker, at de ved blanding af den af HF-forstærkeren forstærkede bredbåndede støj opståede, til spejlfrekvenssignaler svarende, mellemfre-5 kvenssignaler antager modsatte fasebeliggenheder og derved kompenserer hinanden indbyrdes.the intermediate frequency sub-signals ZF1 and ZF2 ^ on one of its outputs 3 or 4, causing the broadband noise amplified by the HF amplifier to produce mirror frequency signals corresponding to intermediate frequency signals, thereby assuming opposite phase locations and thereby compensating.

Mellemfrekvensdelsignalerne ZF1 og ZF2 frembringes i blandingstrinnet M enten ved opad- eller ved nedadblanding. I tilfælde af, at det modtagne højfrek-1 o venssignal HF med sin frekvens fHF ligger i den nedre halvdel af det frekvensbånd, der overhovedet kommer på tale som muligt område for optræden af højfrekvenssignalets frekvens, dannes mellemfrekvensdelsignalerne ZFl og ZF2 med den forudgivne konstante mellemfrek-15 vens fzp ved opadblanding. Derimod frembringes mellem-frekvensdelsignalerne i tilfælde af, at højfrekvenssignalet HF's frekvens fHP ligger i den øvre halvdel af det omtalte frekvensbånd, ved nedadblanding.The intermediate frequency sub-signals ZF1 and ZF2 are generated in the mixing step M either by upward or downward mixing. In the event that the received high frequency frequency signal HF with its frequency fHF is in the lower half of the frequency band which is at all possible range for occurrence of the high frequency signal frequency, the intermediate frequency sub-signals ZF1 and ZF2 are formed between the predetermined constant -15 friend's fzp by upward mixing. In contrast, in the case of high frequency signal HF's frequency fHP being in the upper half of said frequency band, the mid-frequency sub signals are generated by down mixing.

Til opadblandingen afstemmes oscillatorsignalet 20 OS på en sådan frekvens fos over højfrekvenssignalets frekvens fHp, at forskellen mellem oscillatorfrekven-sen fos og højfrekvenssignalets frekvens fjjp giver den ønskede konstante mellemfrekvens fzp. Der gælder nemlig ved opadblandingen følgende relation mellem frek-25 venserne:For the upward mixing, the oscillator signal 20 OS is tuned to such frequency fos above the high frequency signal fHp that the difference between the oscillator frequency fos and the high frequency signal fjp gives the desired constant intermediate frequency fzp. In the case of upward mixing, the following relation between frequencies applies:

fZF = f0S " fHF' for fOS > fHFfZF = f0S "fHF 'for fOS> fHF

I forhold hertil bliver oscillatorsignalet OS 30 til nedadblanding afstemt på en sådan frekvens fos under højfrekvenssignalet HF's frekvens fjjp, at for skellen mellem højfrekvenssignalets frekven fjjp og oscillatorfrekvensen fog ligeledes giver den konstante mellemfrekvens fzp. Ved nedadblanding gælder nemlig 35 følgende relation mellem frekvenserne: 4In this respect, the oscillator signal OS 30 for downward mixing is tuned to such frequency fos below the high frequency signal HF's frequency fj, that for the difference between the high frequency signal frequency fever and the oscillator frequency fog, the constant intermediate frequency fzp also gives. In the case of down mixing, the following relationship between the frequencies is 35: 4

DK 163087 BDK 163087 B

fZF * fHF “ fOS' for f0S < fHFfZF * fHF “fOS 'for f0S <fHF

Som følge af den netop beskrevne anvendelse af opad- og nedadblanding til frembringelse af den fast forudgivne mellemfrekvens fZF behøver oscillatorfrekvensen fgg kun at kunne afstemmes i et frekvensområde, der er mindre end det frekvensbånd B, indenfor hvilket højfrekvenssignalets frekvens kan variere, forudsat at fZF < B/2. Den største reduktion, nemlig en halvering, 10 opnås for fZF = B/4. Derved udnyttes, såvel til opad-blandingen som til nedadblandingen, det samme afstemningsområde for oscillatorfrekvensen.Due to the just described use of up and down mixing to produce the fixed predetermined intermediate frequency fZF, the oscillator frequency fgg needs to be tunable only in a frequency range smaller than the frequency band B within which the high frequency signal frequency may vary, provided that the fZF < B / 2. The largest reduction, namely one-half, 10 is obtained for fZF = B / 4. Thereby, the same tuning range of the oscillator frequency is utilized for both the up-mix and the down-mix.

Et skift fra opad- til nedadblanding og omvendt har også et skift af fasebeliggenhederne for de på blan-dingstrinnet M's udgange 1 og 2 liggende mellem-frekvensdelsignaler ZF1 og ZF2 til følge. Alt efter fasebeliggenheden overlejres da mellemfrekvensdelsigna-lerne hinanden enten på udgangen 3 eller på udgangen 4 på den efterfølgende 3-dB-kobler K. Det ønskede, ved overlejringen af mellemfrekvensdelsignalerne fremkomne mellemfrekvenssignal ZF kan altså, alt efter om der foreligger en opad- eller nedadblanding, enten aftages over udgangen 3 eller over udgangen 4 på 3-dB-kobleren K.A shift from upward to downward mixing and vice versa also results in a shift of the phase locations of the intermediate frequency sub-signals ZF1 and ZF2 located on the mixing stage M's outputs 1 and 2. Depending on the phase location, then the intermediate frequency signals are superimposed on either the output 3 or the output 4 on the subsequent 3-dB coupler K. Thus, the desired intermediate frequency signal ZF can be obtained, depending on whether an upward or downward mixture is present. , either off the output 3 or output 4 of the 3-dB coupler K.

25 En kobleren K's udgange 3 og 4 tilsluttet elektronisk styrbar koblingsenhed S sørger for, at det altid er den mellemfrekvenssignalet ZF leverende koblerudgang, der gennemkobles til koblingsenhedens udgangsklemme 5, mens den anden koblerudgang afsluttes refleksionsfrit med en tilpasningsmodstand.A coupler K's outputs 3 and 4 connected to electronically controllable coupling unit S ensures that it is always the intermediate frequency signal ZF supplying coupler output that is passed to the coupler output terminal 5, while the other coupler output is terminated reflection-free with an adaptation resistor.

Koblingsenheden S har to signalveje SI og S2, som løber sammen på udgangsklemmen 5, og hvoraf signalvejen SI er tilsluttet koblerudgangen 3, og signalvejen S2 er tilsluttet koblerudgangen 4. Hver 35 signalvej SI, S2 har en afgrening AZ1, AZ2 med et modstandsnetværk, som udgør tilpasningsmodstanden for kobleren K.The switching unit S has two signal paths S1 and S2 which coincide at the output terminal 5, of which the signal path S1 is connected to the coupler output 3 and the signal path S2 is connected to the coupler output 4. Each signal path S1, S2 has a branch AZ1, AZ2 with a resistance network which constitutes the coupling resistance of coupler K.

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I signalvejene SI og S2 er der indføjet dioder Dl og D2, f.eks. PIN-dioder, og i afgreningerne AZ1 og AZ2 er der ligeledes indføjet dioder D12 og D22. Disse dioder Dl, D12, D2, D22 er hver især 5 polet således, at hvis de alle f.eks. aktiveres med en positiv spænding, er den første signalvej SI hhv. S2 fra kobleren K til udgangsklemmen 5 gennemkoblet, og den anden signalvej S2 hhv. SI er frakoblet fra udgangsklemmen, men dens afgrening AZ2 hhv. AZ1 er 10 gennemkoblet til kobleren. Derimod gælder det ved en aktivering af dioderne med en napativ spænding, at den anden signalvej S2 hhv. Si er gennemkoblet fra kobleren K til udgangsklemmen 5, og den første signalvej SI hhv. S2 er frakoblet fra udgangsklemmen 5, men 15 dens afgrening AZ1 hhv. AZ2 er gennemkoblet til kobleren.In the signal paths S1 and S2, diodes D1 and D2 are inserted, e.g. PIN diodes, and in the branches AZ1 and AZ2, diodes D12 and D22 are also inserted. These diodes D1, D12, D2, D22 are each 5 poles such that if they all e.g. activated with a positive voltage, the first signal path is SI respectively. S2 from the coupler K to the output terminal 5 through and the second signal path S2 respectively. The SI is disconnected from the output terminal, but its branch AZ2 respectively. AZ1 is 10 connected to the coupler. On the other hand, by activating the diodes with a napative voltage, the second signal path S2 and D2 respectively. Si is wired from coupler K to output terminal 5, and the first signal path S1, respectively. S2 is disconnected from the output terminal 5, but its branch AZ1, respectively. AZ2 is connected to the coupler.

Styrespændingerne modtager dioderne fra et impulsf ormenetværk IF, som omformer en af en på tegningen ikke vist processor afgivet styrespænding UST til im-20 pulser med høj flankestejlhed og nødvendig amplitudehøjde. Med UQ1 og Uq2 betegnes i kredsløbet driftsspændingerne for en i impulsformenetværket IF forhåndenværende differensforstærker v.The control voltages receive the diodes from a pulse form network IF which converts a control voltage UST shown in the drawing into transformer pulses with high flank stiffness and necessary amplitude height. With UQ1 and Uq2, in the circuit, the operating voltages of a differential amplifier v present in the pulse form network IF are denoted.

Den omtalte processor bestemmer ud fra det mod-25 tagne højfrekvenssignals frekvens, om mellemfrekvensen skal dannes ved opad- eller nedadblanding, og styrer i overensstemmelse hermed den afstembare oscillator og med sin styrespænding UST koblingsenheden S således, at denne altid gennemkobler den koblerudgang, som stiller 30 mellemfrekvenssignalet ZF til rådighed, til udgangsklemmen 5.The said processor determines from the frequency of the received high frequency signal whether the intermediate frequency is to be formed by up or down mixing, and accordingly controls the tunable oscillator and with its control voltage the UST switching unit S so that it always switches through the coupling output which provides 30 the intermediate frequency signal ZF available, to the output terminal 5.

Claims (3)

6 DK 163087 B6 DK 163087 B 1. Frekvensomsætter med et blandingstrin med en indgang for et oscillatorsignal, en anden indgang for et højfrekvenssignal og to udgange, over hvilke der ligger to ved blandingen opståede, indbyrdes faseforskudte mel-5 lemfrekvensdelsignaler, og med en blandingstrinudgangene tilsluttet kobler (K), som på én af sine to udgange overlejrer de to mellemfrekvensdelsignaler i samme fase og på sin anden udgang er afsluttet med en tilpasningsmodstand, hvorhos de i blandingstrinnet frembragte, til 10 spejlfrekvenssignaler svarende, mellemfrekvenssignaler indtager modsatte fasebeliggenheder og kompenserer hinanden indbyrdes, kendetegnet ved, at mellem-frekvensdelsignalerne (ZF1, ZF2) opstår ved opadblan-ding, når højfrekvenssignalets (HF) frekvens fjjp ligger 15 i et nedre område af det frekvensbånd, i hvilket højfrekvenssignalet kan antage en vilkårlig frekvens, at mellemfrekvensdels ignalerne (ZF1, ZF2) opstår ved nedad-blanding, hvis højfrekvenssignalets (HF) frekvens % ligger i et øvre område af det nævnte frekvensbånd, 20 hvorhos oscillatorsignalet (OS) til opadblandingen er afstemt på en sådan frekvens fos, som ligger over højfrekvenssignalets (HF) frekvens fgp, at forskellen mellem oscillatorfrekvensen fos og højfrekvenssignalets frekvens fjjp i hvert enkelt tilfælde resulterer i en 25 konstant forudgiven værdi, og oscillatorsignalet (OS) til nedadblandingen er afstemt på en sådan frekvens fQS, som ligger under høj frekvenssignalets frekvens fgp, at forskellen mellem højfrekvenssignalets frekvens fgp og oscillatorfrekvensen fos i hvert enkelt tilfælde resul-30 terer i den samme fast forudgivne værdi, og at der på koblerens (K) to udgange (3,4) er tilsluttet en koblingsenhed (S), som i hvert enkelt tilfælde gennemkobler den koblerudgang (3,4), over hvilken det ved overlej-ringen i samme fase af mellemfrekvensdelsignalerne 35 7 DK 163087 B (ZF1,ZF2) opståede mellemfrekvenssignal (ZF) ligger, og tilkobler tilpasningsmodstanden til den anden koblerudgang.1. Frequency converter with a mixing stage having an input for an oscillator signal, a second input for a high frequency signal and two outputs over which there are two intermittent phase-shifted intermediate frequency sub-signals and with a mixing stage outputs connected to the switch (K) at one of its two outputs, the two intermediate frequency sub-signals overlap in the same phase and at its second output are terminated by an adaptation resistor, where, in the mixing step, the 10-frequency signals corresponding to intermediate frequency signals take up opposite phase locations and compensate for each other, the frequency sub-signals (ZF1, ZF2) occur by up-mixing, when the frequency frequency of the high-frequency signal (HF) lies in a lower region of the frequency band at which the high-frequency signal can assume any frequency that the medium-frequency sub-signals (ZF1) mix if the high frequency signal (HF) frequency% is in an upper region of said frequency band, wherein the oscillator signal (OS) for the upward mixing is tuned to such frequency fos which is above the high frequency signal (HF) frequency fgp that the difference between the oscillator frequency fos and the high frequency signal in each case results in a constant predetermined value and the oscillator signal (OS) for the downward mixing is tuned to such frequency fQS which is below the high frequency signal fgp that the difference between the high frequency signal fgp and the oscillator frequency fos in each case results in the same fixed and the two outputs (3,4) of the coupler (K) are connected to a coupling unit (S), which in each case passes through the coupler output (3,4), over which, during the overlay in the same phase, of the intermediate frequency sub-signals 35 7 DK 163087 B (ZF1, ZF2) generated intermediate frequency signal (ZF) lies and connects the adaptive resistor to the second coupler output. 2. Frekvensomsætter ifølge krav 1, kende-5 tegnet ved, at kobleren (K) er en 90°-3dB-kobler.Frequency converter according to claim 1, characterized in that the coupler (K) is a 90 ° -3dB coupler. 3. Frekvensomsætter ifølge krav 1, kendetegnet ved, at koblingsenheden (S) har to signalveje (SI, S2), som løber sammen ved en udgangsklemme (5), og som er tilsluttet de to koblerudgange (3, 4), at 10 hver signalvej (SI, S2) har en afgrening (AZ1, AZ2) med en tilpasningsmodstand for kobleren (K), at hver signalvej (SI, S2) og dens afgrening (AZ1, AZ2) indeholder et diodenetværk (Dl, D12, D2, D22), som er polet således, at ved en diodenetværkene påtrykt positiv styrespænding 15 er den første signalvej gennemkoblet til udgangsklemmen (5), og tilpasningsmodstanden er gennemkoblet til den anden signalvej, mens ved en negativ styrespænding den anden signalvej er gennemkoblet til udgangsklemmen (5), og tilpasningsmodstanden er gennemkoblet til den første 20 signalvej.Frequency converter according to claim 1, characterized in that the coupling unit (S) has two signal paths (S1, S2) which coincide at an output terminal (5) and which are connected to the two coupler outputs (3, 4), signal path (SI, S2) has a branch (AZ1, AZ2) with a coupling resistance (K) that each signal path (SI, S2) and its branch (AZ1, AZ2) contain a diode network (D1, D12, D2, D22 ), which is polished such that by a positive control voltage 15 applied to the diode networks, the first signal path is connected to the output terminal (5) and the adaptive resistor is connected to the second signal path, while at a negative control voltage the second signal path is connected to the output terminal (5). , and the matching resistor is routed to the first 20 signal path.
DK034886A 1985-01-24 1986-01-23 FREQUENCY TRANSMITTER WITH SCRAPBAND OSCILLATOR DK163087C (en)

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Application Number Priority Date Filing Date Title
DE3502294 1985-01-24
DE19853502294 DE3502294A1 (en) 1985-01-24 1985-01-24 FREQUENCY CONVERTER

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DK34886D0 DK34886D0 (en) 1986-01-23
DK34886A DK34886A (en) 1986-07-25
DK163087B true DK163087B (en) 1992-01-13
DK163087C DK163087C (en) 1992-06-09

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AT (1) ATE39597T1 (en)
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JPH07231273A (en) * 1994-02-18 1995-08-29 Sharp Corp Tuner for receiving satellite broadcast
DE19532989C1 (en) * 1995-09-07 1996-11-07 Telefunken Microelectron Multiplicative mixer with three or four-pole compensation stage
DE19624390A1 (en) * 1996-06-19 1998-01-08 Telefunken Microelectron Frequency conversion method for amplitude modulated input signal

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US3831097A (en) * 1973-02-23 1974-08-20 Rhg Electronics Labor Inc Image recovery receiver
US4367560A (en) * 1981-03-13 1983-01-04 Rockwell International Corporation Low frequency converter with diode quad mixer
US4457022A (en) * 1982-04-28 1984-06-26 Motorola Inc. Two diode image rejection and pseudo-image enhancement mixer

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EP0188662A3 (en) 1987-11-19
EP0188662A2 (en) 1986-07-30
DE3567134D1 (en) 1989-02-02
EP0188662B1 (en) 1988-12-28
ATE39597T1 (en) 1989-01-15
DK163087C (en) 1992-06-09
DK34886D0 (en) 1986-01-23
DE3502294A1 (en) 1986-07-24
DK34886A (en) 1986-07-25

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