WO1994000912A1 - Circuit oscillateur et son utilisation - Google Patents

Circuit oscillateur et son utilisation Download PDF

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Publication number
WO1994000912A1
WO1994000912A1 PCT/EP1993/001577 EP9301577W WO9400912A1 WO 1994000912 A1 WO1994000912 A1 WO 1994000912A1 EP 9301577 W EP9301577 W EP 9301577W WO 9400912 A1 WO9400912 A1 WO 9400912A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
stage
oscillator
connection
signal
Prior art date
Application number
PCT/EP1993/001577
Other languages
German (de)
English (en)
Inventor
Gerhard Maier
Klaus Clemens
Original Assignee
Deutsche Thomson-Brandt Gmbh
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 DE4219990A external-priority patent/DE4219990A1/de
Application filed by Deutsche Thomson-Brandt Gmbh filed Critical Deutsche Thomson-Brandt Gmbh
Priority to EP93917586A priority Critical patent/EP0673561A1/fr
Publication of WO1994000912A1 publication Critical patent/WO1994000912A1/fr

Links

Classifications

    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
    • H03B5/1841—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a strip line resonator
    • H03B5/1847—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a strip line resonator the active element in the amplifier being a semiconductor device
    • H03B5/1852—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a strip line resonator the active element in the amplifier being a semiconductor device the semiconductor device being a field-effect device
    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1203—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier being a single transistor
    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1228—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more field effect transistors
    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
    • H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
    • H03B5/1243—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising voltage variable capacitance diodes
    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
    • H03B5/1293—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator having means for achieving a desired tuning characteristic, e.g. linearising the frequency characteristic across the tuning voltage range
    • 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
    • H03B2200/0002—Types of oscillators
    • H03B2200/0008—Colpitts oscillator
    • 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
    • H03B2200/004—Circuit elements of oscillators including a variable capacitance, e.g. a varicap, a varactor or a variable capacitance of a diode or transistor
    • 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
    • H03B2200/0056—Circuit elements of oscillators including a diode used for switching
    • 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
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0088—Reduction of noise
    • 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
    • H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
    • H03B2201/02—Varying the frequency of the oscillations by electronic means
    • H03B2201/0208—Varying the frequency of the oscillations by electronic means the means being an element with a variable capacitance, e.g. capacitance diode

Definitions

  • the present invention relates to an oscillator circuit according to the preamble of the main claim and a preferred use according to the first use claim.
  • Oszi llators for generating signals with periodic vibrations are known in a variety of designs.
  • Co Ipi tts oscillators are relatively inexpensive to buy as a construction stage. However, it is not possible to control the frequency of its output signal by means of a simple control signal, which is designed, for example, as a DC voltage signal.
  • a first stage which oscillates essentially at a constant frequency, as in the case of ⁇ pi el swei se a Colpitt ⁇ -Oszi Ilator, is followed by a second stage which has a capacitance diode, such as a so-called La bda half (L / 2 ) Oscillator. Its frequency can be changed be by driving a capacitance diode with a DC voltage.
  • the capacitance diode changes its capacitance as a function of the voltage value by means of a DC voltage signal, and thus the frequency value of the oscillator output signal is also varied accordingly.
  • the oscillator according to the invention can preferably be used for a converter in which a controllable oscillator with an output signal with a high frequency value is required.
  • the frequency of the oscillator can be regulated, for example, by a control signal of an amplifier stage, such as an AFC (Automatic Frequency Control) signal in the case of gaming.
  • AFC Automatic Frequency Control
  • PLL Phase Locked Loop
  • Fig. 1 a preferred embodiment
  • Fig. 1 shows a Colpitts oscillator 10, which can be implemented, for example, as an integrated circuit and has a MOS transistor 11.
  • the drain connection of the transistor 11 is connected to ground via a resistor 12.
  • the source connection of transistor 11 is connected via a resistor 13 to a positive voltage U +, to which a first connection of a further resistor 14 also leads.
  • With the second connection of the resistor 14 two further resistors 15, 16 are connected, one of which (15) leads to ground and the other (16) is connected with its second connection to the gate connection of the transistor 11.
  • a series connection consisting of two capacitors 17, 18 leads from the gate connection to ground.
  • the center tap of this line circuit is connected to Source.
  • the Colpitts output signal is passed via an input capacitor 21 to a further capacitor 22, the second connection of which is connected to ground.
  • an inductor 23 which is realized in this exemplary embodiment as a strip conductor, leads to two further capacitors 24, 25.
  • the capacitor 24 is connected to ground and the second connection of the capacitor 25 is connected to the cathode of a capacitance diode 26 and a first connection of a resistor 27.
  • the anode of the diode 26 is grounded and the second connection of the resistor 27 is connected to a connection 28, via which an A FC control signal, which in this embodiment is designed as a DC voltage signal, is supplied.
  • the capacitance diode 26 is therefore arranged in terms of circuitry on the side of the oscillatory field of the second stage 20 opposite the active oscillator part.
  • An output signal of the overall arrangement of the oscillator circuit can be tapped off at the junction of the resistor 13 with the source connection of the transistor 11 and passed on to an oscillator output connection 40.
  • This switchover device can have a capacitor 30 at the common connection point of the capacitors 21 and 22 with the coil 23, which capacitor is connected to a diode 31 connected to ground and can optionally be connected to ground via this diode.
  • a voltage U provided for this purpose can be fed in at the connection point between the capacitor 30 and the diode 31.
  • This Ums cha Itei nr icht can be achieved when using an oscillator circuit as part of a frequency converter that depending on the relative position of the image and the sound carrier of a received transmitter, the frequency of the Festoszi llators switchable below or above is the first intermediate frequency ZF1, so as to convert reception channels with an "inverted" image carrier / sound carrier position into the "correct” position for subsequent signal processing.
  • Capacitor 21 2.7 pF Capacitor 22 2.2 pF Capacitor 24 3.9 pF Capacitor 25 0.47 pF capacitance diode 26 1T32 resistor 27 47 kOhm
  • Fig. 3 shows that the oscillator frequency increases with approximately 125 kHz / V with increasing DC voltage U28.
  • FIG. 4 A preferred example of use is shown in FIG. 4.
  • a tuner 30 receives a television input signal, in this exemplary embodiment via an antenna 31, and converts the reception signal with the frequency fe to a first intermediate frequency (ZF1.) Using a mixer 32, to which a first oscillator 33 is assigned ) with a frequency value in the range around 1200 MHz.
  • An intermediate frequency amplifier 34 to which the IF1 signal is fed, has a second mixer 35 with a second oscillator 36 and converts the IF1 signal into a second intermediate frequency signal (IF2), which in this exemplary embodiment is a Frequency value in the range of 30 - 70 MHz can have.
  • IF2 second intermediate frequency signal
  • an oscillator circuit according to the present invention is particularly suitable since its Frequency can be controlled by an AFC signal that is generated by an IF stage 37.
  • stages 30, 34 shown in FIG. 4 be constructed in such a way that they are virtually separated from one another. This means that, apart from a supply line which leads the ZF1 signal from the tuner 30 to the intermediate frequency amplifier 34, there is no electrical, magnetic or electromagnetic connection. This also includes the fact that there are no common connexions.
  • n 0, 1, 2, ...
  • L01 frequency of the oscillator of the first stage
  • L02 frequency of the oscillator of the second stage.
  • ZF1 m * L01 +/- n * fe. It has proven to be particularly advantageous to select the frequency range of the ZF1 in the range from approximately 1100 to 1400 MHz.
  • the oscillator circuit according to the invention can also be used in converter circuits which process signals of other frequency ranges; in particular frequency ranges et a between 1 and 2 gigahertz are provided in applications with AFC; a double converter of the type shown in Fig. 4 can also be operated with other oscillators.
  • oscillators whose frequency is regulated by a PLL.

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

L'invention concerne un circuit oscillateur qui produit des signaux de sortie de fréquence élevée et qui est commandé par un signal à tension continue. Selon l'invention, un second étage (20) qui comprend une diode à capacité variable est monté à la suite d'un premier étage (10) qui oscille sensiblement à une fréquence continue. L'invention est utilisée de préférence dans les convertisseurs doubles pour traiter des signaux de télévision.
PCT/EP1993/001577 1992-06-19 1993-06-21 Circuit oscillateur et son utilisation WO1994000912A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93917586A EP0673561A1 (fr) 1992-06-19 1993-06-21 Circuit oscillateur et son utilisation

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEP4219990.5 1992-06-19
DE4219990A DE4219990A1 (de) 1992-06-19 1992-06-19 Oszillatorschaltung und deren Verwendung
DEP4220250.7 1992-06-22
DE4220250 1992-06-22

Publications (1)

Publication Number Publication Date
WO1994000912A1 true WO1994000912A1 (fr) 1994-01-06

Family

ID=25915828

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/001577 WO1994000912A1 (fr) 1992-06-19 1993-06-21 Circuit oscillateur et son utilisation

Country Status (2)

Country Link
EP (1) EP0673561A1 (fr)
WO (1) WO1994000912A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5859573A (en) * 1996-07-25 1999-01-12 Nokia Mobile Phones, Ltd. Circuit for separating the output of an oscillator from the other parts of a mobile communication system
FR2782805A1 (fr) * 1998-08-27 2000-03-03 Canon Kk Procede de mesure de la resistance electrique d'un corps resistif et dispositifs pour la mise en oeuvre d'un tel procede
US6407557B1 (en) 1998-08-27 2002-06-18 Canon Kabushiki Kaisha Process for measuring the electrical resistance of a resistive body for example for checking the conformity of a liquid product and devices for carrying out such a process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2276749A1 (fr) * 1974-06-26 1976-01-23 Videon Oscillateur uhf a decalage de bande de frequences, destine en particulier aux tuners multinormes de television
JPS6018024A (ja) * 1983-07-11 1985-01-30 Toshiba Corp 局部発振回路
EP0152547A2 (fr) * 1984-02-17 1985-08-28 Blaupunkt-Werke GmbH Oscillateur haute fréquence
EP0207650A2 (fr) * 1985-06-07 1987-01-07 Vari-L Company, Inc. Oscillateur électronique à large gamme
JPS62183609A (ja) * 1986-02-07 1987-08-12 Murata Mfg Co Ltd マイクロ波発振器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2276749A1 (fr) * 1974-06-26 1976-01-23 Videon Oscillateur uhf a decalage de bande de frequences, destine en particulier aux tuners multinormes de television
JPS6018024A (ja) * 1983-07-11 1985-01-30 Toshiba Corp 局部発振回路
EP0152547A2 (fr) * 1984-02-17 1985-08-28 Blaupunkt-Werke GmbH Oscillateur haute fréquence
EP0207650A2 (fr) * 1985-06-07 1987-01-07 Vari-L Company, Inc. Oscillateur électronique à large gamme
JPS62183609A (ja) * 1986-02-07 1987-08-12 Murata Mfg Co Ltd マイクロ波発振器

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 131 (E - 319) 6 June 1985 (1985-06-06) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 026 (E - 577) 26 January 1988 (1988-01-26) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5859573A (en) * 1996-07-25 1999-01-12 Nokia Mobile Phones, Ltd. Circuit for separating the output of an oscillator from the other parts of a mobile communication system
FR2782805A1 (fr) * 1998-08-27 2000-03-03 Canon Kk Procede de mesure de la resistance electrique d'un corps resistif et dispositifs pour la mise en oeuvre d'un tel procede
US6407557B1 (en) 1998-08-27 2002-06-18 Canon Kabushiki Kaisha Process for measuring the electrical resistance of a resistive body for example for checking the conformity of a liquid product and devices for carrying out such a process

Also Published As

Publication number Publication date
EP0673561A1 (fr) 1995-09-27

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