GB2018065A - Receivers - Google Patents

Receivers

Info

Publication number
GB2018065A
GB2018065A GB7911060A GB7911060A GB2018065A GB 2018065 A GB2018065 A GB 2018065A GB 7911060 A GB7911060 A GB 7911060A GB 7911060 A GB7911060 A GB 7911060A GB 2018065 A GB2018065 A GB 2018065A
Authority
GB
United Kingdom
Prior art keywords
frequency
oscillator
voltage
circuit
retuning
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB7911060A
Other versions
GB2018065B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Loewe Opta GmbH
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 GB2018065A publication Critical patent/GB2018065A/en
Application granted granted Critical
Publication of GB2018065B publication Critical patent/GB2018065B/en
Expired legal-status Critical Current

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>
GB7911060A 1978-04-04 1979-03-29 Receivers Expired GB2018065B (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
GB2018065A true GB2018065A (en) 1979-10-10
GB2018065B GB2018065B (en) 1982-07-21

Family

ID=6036101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7911060A Expired GB2018065B (en) 1978-04-04 1979-03-29 Receivers

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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034467A1 (en) * 1980-02-18 1981-08-26 Schlumberger Electronics (U.K.) Limited Receivers suitable for use in remotely-operable switching devices and data transmission systems
EP0215490A2 (en) * 1985-09-19 1987-03-25 Matsushita Electric Industrial Co., Ltd. A.F.C. system for broad-band FM receiver
EP0948134A2 (en) * 1998-04-01 1999-10-06 Sony Corporation Radio receiver
EP1385268A1 (en) * 2002-07-25 2004-01-28 Pioneer Corporation Digital-to-analog converter

Families Citing this family (2)

* 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
US4959872A (en) * 1988-06-23 1990-09-25 Kabushiki Kaisha Toshiba Automatic frequency control apparatus for FM receivers

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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034467A1 (en) * 1980-02-18 1981-08-26 Schlumberger Electronics (U.K.) Limited Receivers suitable for use in remotely-operable switching devices and data transmission systems
EP0215490A2 (en) * 1985-09-19 1987-03-25 Matsushita Electric Industrial Co., Ltd. A.F.C. system for broad-band FM receiver
EP0215490A3 (en) * 1985-09-19 1989-01-25 Matsushita Electric Industrial Co., Ltd. A.f.c. system for broad-band fm receiver
EP0948134A2 (en) * 1998-04-01 1999-10-06 Sony Corporation Radio receiver
EP0948134A3 (en) * 1998-04-01 2003-09-17 Sony Corporation Radio receiver
EP1385268A1 (en) * 2002-07-25 2004-01-28 Pioneer Corporation Digital-to-analog converter
US6853321B2 (en) 2002-07-25 2005-02-08 Pioneer Corporation Digital-to-analog converter

Also Published As

Publication number Publication date
NL180795B (en) 1986-11-17
CH641608A5 (en) 1984-02-29
SE427885B (en) 1983-05-09
DE2814429B2 (en) 1980-02-21
IT1111927B (en) 1986-01-13
SE7902787L (en) 1979-10-05
NL180795C (en) 1987-04-16
DE2814429A1 (en) 1979-10-25
NL7902658A (en) 1979-10-08
DE2814429C3 (en) 1980-10-09
IT7921591A0 (en) 1979-04-04
FR2422293B1 (en) 1982-06-18
GB2018065B (en) 1982-07-21
FR2422293A1 (en) 1979-11-02

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980329