SE7902787L - RECEIVER CONNECTION WITH A FREQUENCY SYNTHESIZER FOR COMMUNICATION TECHNICAL RECEIVER DEVICES - Google Patents

RECEIVER CONNECTION WITH A FREQUENCY SYNTHESIZER FOR COMMUNICATION TECHNICAL RECEIVER DEVICES

Info

Publication number
SE7902787L
SE7902787L SE7902787A SE7902787A SE7902787L SE 7902787 L SE7902787 L SE 7902787L SE 7902787 A SE7902787 A SE 7902787A SE 7902787 A SE7902787 A SE 7902787A SE 7902787 L SE7902787 L SE 7902787L
Authority
SE
Sweden
Prior art keywords
frequency
oscillator
voltage
receiver
circuit
Prior art date
Application number
SE7902787A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE427885B (en
Inventor
Missbach H
Original Assignee
Loewe Opta 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
Application filed by Loewe Opta Gmbh filed Critical Loewe Opta Gmbh
Publication of SE7902787L publication Critical patent/SE7902787L/en
Publication of SE427885B publication Critical patent/SE427885B/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
    • 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
    • H03J5/02—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 variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

In a receiver a settable frequency divider (6,7) divides the frequency of a voltage-controlled oscillator (3). The resultant frequency is compared in a phase comparison circuit (8) with a constant reference frequency an error voltage proportional to the phase deviation controls the oscillator (3). The oscillator frequency is furthermore additively mixed with the received frequency in a mixer circuit (2), which is followed by an intermediate frequency amplifier (4). A regulating circuit (5) including a frequency discriminator with a capacitance diode is provided for the purpose of automatic retuning and additional subjective detuning. It generates, in dependence on the deviation of the received frequency from the oscillator frequency as well as also through application of a voltage to the capacitance diode, a regulating voltage which after analog-digital conversion at 11 proportionally varies the set dividing ratio of the frequency divider (6,7). Retuning and search for a different station is facilitated by control keys 13, 14, a coder 15, a switch 12, a D/A converter 16 and a logic circuit 17 which shifts the frequency discriminator characteristics as well as vary the division ratio of 7 until the desired station is obtained. <IMAGE>
SE7902787A 1978-04-04 1979-03-28 RECEIVER CONNECTION IN A COMMUNICATION TECHNICAL RECEIVER WITH DIGITAL FREQUENCY SYNTHETIZER SE427885B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2814429A DE2814429C3 (en) 1978-04-04 1978-04-04 Receiver circuit with a frequency sytithetizer in telecommunications receiving devices

Publications (2)

Publication Number Publication Date
SE7902787L true SE7902787L (en) 1979-10-05
SE427885B SE427885B (en) 1983-05-09

Family

ID=6036101

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7902787A SE427885B (en) 1978-04-04 1979-03-28 RECEIVER CONNECTION IN A COMMUNICATION TECHNICAL RECEIVER WITH DIGITAL FREQUENCY SYNTHETIZER

Country Status (7)

Country Link
CH (1) CH641608A5 (en)
DE (1) DE2814429C3 (en)
FR (1) FR2422293A1 (en)
GB (1) GB2018065B (en)
IT (1) IT1111927B (en)
NL (1) NL180795C (en)
SE (1) SE427885B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580928A (en) * 1978-12-15 1980-06-18 Sony Corp Channel selection device
ZA81769B (en) * 1980-02-18 1982-02-24 Sangamo Weston Receivers suitable for use in remotely-operable switching devices and data transmission systems
US4709406A (en) * 1985-09-19 1987-11-24 Matsushita Electric Industrial Co., Ltd. A.F.C. system for broad-band FM receiver
US4959872A (en) * 1988-06-23 1990-09-25 Kabushiki Kaisha Toshiba Automatic frequency control apparatus for FM receivers
JP4089003B2 (en) * 1998-04-01 2008-05-21 ソニー株式会社 Receiver and receiving method
JP3978744B2 (en) 2002-07-25 2007-09-19 パイオニア株式会社 Digital to analog converter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1412412A1 (en) * 1960-12-27 1968-10-03 Metz App Werke Automatic sharpening
US3624512A (en) * 1969-06-02 1971-11-30 Rca Corp Automatic frequency control system
FR2175671B1 (en) * 1972-03-17 1977-04-01 Trt Telecom Radio Electr
US4025953A (en) * 1975-11-26 1977-05-24 Quasar Electronics Corporation Frequency synthesizer tuning system for television receivers
US4041535A (en) * 1976-07-22 1977-08-09 Matsushita Electric Corporation Of America Frequency synthesizer tuning system with signal seek control

Also Published As

Publication number Publication date
DE2814429A1 (en) 1979-10-25
NL180795C (en) 1987-04-16
IT1111927B (en) 1986-01-13
NL7902658A (en) 1979-10-08
DE2814429C3 (en) 1980-10-09
IT7921591A0 (en) 1979-04-04
FR2422293A1 (en) 1979-11-02
DE2814429B2 (en) 1980-02-21
CH641608A5 (en) 1984-02-29
NL180795B (en) 1986-11-17
FR2422293B1 (en) 1982-06-18
SE427885B (en) 1983-05-09
GB2018065A (en) 1979-10-10
GB2018065B (en) 1982-07-21

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