DE1912855B2 - Switching arrangement for digital display - is of tuning frequency of heterodyne receiver with oscillator vibrations conveyed to counter - Google Patents

Switching arrangement for digital display - is of tuning frequency of heterodyne receiver with oscillator vibrations conveyed to counter

Info

Publication number
DE1912855B2
DE1912855B2 DE19691912855 DE1912855A DE1912855B2 DE 1912855 B2 DE1912855 B2 DE 1912855B2 DE 19691912855 DE19691912855 DE 19691912855 DE 1912855 A DE1912855 A DE 1912855A DE 1912855 B2 DE1912855 B2 DE 1912855B2
Authority
DE
Germany
Prior art keywords
counter
tuning frequency
digital display
switching arrangement
frequency
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
DE19691912855
Other languages
German (de)
Other versions
DE1912855A1 (en
DE1912855C3 (en
Inventor
Karl 8000 Muenchen Roessner
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19691912855 priority Critical patent/DE1912855C3/en
Publication of DE1912855A1 publication Critical patent/DE1912855A1/en
Publication of DE1912855B2 publication Critical patent/DE1912855B2/en
Application granted granted Critical
Publication of DE1912855C3 publication Critical patent/DE1912855C3/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/02—Indicating arrangements
    • H03J1/04—Indicating arrangements with optical indicating means
    • H03J1/045—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like
    • H03J1/047—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's
    • H03J1/048—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's with digital indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/10—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into a train of pulses, which are then counted, i.e. converting the signal into a square wave
    • 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Superheterodyne Receivers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Auxiliary Devices For Music (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

In the arrangement the vibrations of the heterodyne oscillator are conveyed to a counting device by means of switching elements and the reading is obtained from the counter result. The intermediate frequency determining the frequency displacement of the tuning frequency in relation to the heterodyne frequency is chosen in such a way that it corresponds to an arbitrary counting value of one or more counter stages which are to be allocated above the maximum indicating counter stage, which extend the counting capacity, yet which are excluded from a reading. No extra adapting or adjusting measures are needed on the counting device.
DE19691912855 1969-03-13 1969-03-13 Circuit arrangement for the digital display of the tuning frequency of a heterodyne receiver Expired DE1912855C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19691912855 DE1912855C3 (en) 1969-03-13 1969-03-13 Circuit arrangement for the digital display of the tuning frequency of a heterodyne receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691912855 DE1912855C3 (en) 1969-03-13 1969-03-13 Circuit arrangement for the digital display of the tuning frequency of a heterodyne receiver

Publications (3)

Publication Number Publication Date
DE1912855A1 DE1912855A1 (en) 1970-10-01
DE1912855B2 true DE1912855B2 (en) 1975-04-03
DE1912855C3 DE1912855C3 (en) 1975-11-13

Family

ID=5728057

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691912855 Expired DE1912855C3 (en) 1969-03-13 1969-03-13 Circuit arrangement for the digital display of the tuning frequency of a heterodyne receiver

Country Status (1)

Country Link
DE (1) DE1912855C3 (en)

Also Published As

Publication number Publication date
DE1912855A1 (en) 1970-10-01
DE1912855C3 (en) 1975-11-13

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee