ES452237A1 - Radioreceiver switching - Google Patents

Radioreceiver switching

Info

Publication number
ES452237A1
ES452237A1 ES452237A ES452237A ES452237A1 ES 452237 A1 ES452237 A1 ES 452237A1 ES 452237 A ES452237 A ES 452237A ES 452237 A ES452237 A ES 452237A ES 452237 A1 ES452237 A1 ES 452237A1
Authority
ES
Spain
Prior art keywords
amplitude
auxiliary carrier
circuit arrangement
frequency
receiver
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.)
Expired
Application number
ES452237A
Other languages
Spanish (es)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES452237A1 publication Critical patent/ES452237A1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/091—Traffic information broadcasting
    • G08G1/094—Hardware aspects; Signal processing or signal properties, e.g. frequency bands

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuits Of Receivers In General (AREA)
  • Transmitters (AREA)
  • Noise Elimination (AREA)

Abstract

The circuit arrangement (7) is installed in a VHF receiver. The input of the circuit arrangement is connected to the output of the frequency demodulator (4) of the VHF receiver. The auxiliary carrier frequency is filtered out by means of a filter (10, 12). A first signal dependent on the auxiliary carrier amplitude is generated with a diode (14) and a transistor (17), and a second signal dependent on the modulation of the auxiliary carrier is generated with an amplitude demodulator (21, 22, 23). These two signals control a threshold value switch (30) if the amplitude of the auxiliary carrier and the amplitude of the characteristic range frequency in each case exceed a specific value. On receiving a traffic broadcast transmitter, the circuit arrangement initiates a switching operation which indicates to the user that his receiver is tuned to a traffic broadcast transmitter.
ES452237A 1975-10-04 1976-10-08 Radioreceiver switching Expired ES452237A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2544508A DE2544508C3 (en) 1975-10-04 1975-10-04 Circuit arrangement, in particular for a radio receiver

Publications (1)

Publication Number Publication Date
ES452237A1 true ES452237A1 (en) 1977-11-01

Family

ID=5958337

Family Applications (1)

Application Number Title Priority Date Filing Date
ES452237A Expired ES452237A1 (en) 1975-10-04 1976-10-08 Radioreceiver switching

Country Status (9)

Country Link
AT (1) AT365021B (en)
CH (1) CH607855A5 (en)
DE (1) DE2544508C3 (en)
ES (1) ES452237A1 (en)
FR (1) FR2326814A1 (en)
GB (1) GB1567761A (en)
IT (1) IT1071634B (en)
NL (1) NL7610813A (en)
SE (1) SE410927B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725068C2 (en) * 1977-06-03 1983-05-26 Philips Patentverwaltung Gmbh, 2000 Hamburg Circuit arrangement for a radio receiver
DE3008140C2 (en) * 1980-03-04 1986-01-16 Philips Patentverwaltung Gmbh, 2000 Hamburg Circuit arrangement for generating a switching signal when an identification signal occurs
CN109581133B (en) * 2019-01-24 2020-10-09 黄河科技学院 Performance testing device based on antiferroelectric material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2050782A5 (en) * 1969-06-25 1971-04-02 Cit Alcatel
NL7214392A (en) * 1972-10-25 1974-04-29
DE2360499B2 (en) * 1973-12-05 1977-11-24 Zusatz in: 24 47 407 SABA Schwarzwälder Apparate-Bau-Anstalt August Schwer Söhne GmbH, 7730 Villingen CIRCUIT ARRANGEMENT FOR DETECTION AND DISPLAY OF A PILOT SIGNAL RADIATED BY A RADIO TRANSMITTER
DE2460983A1 (en) * 1974-12-21 1976-07-01 Standard Elektrik Lorenz Ag RADIO RECEIVER

Also Published As

Publication number Publication date
DE2544508A1 (en) 1977-04-14
FR2326814B1 (en) 1982-09-03
ATA730576A (en) 1981-04-15
DE2544508B2 (en) 1979-07-19
SE410927B (en) 1979-11-12
AT365021B (en) 1981-12-10
DE2544508C3 (en) 1983-11-03
NL7610813A (en) 1977-04-06
FR2326814A1 (en) 1977-04-29
IT1071634B (en) 1985-04-10
CH607855A5 (en) 1978-11-30
SE7610897L (en) 1977-04-05
GB1567761A (en) 1980-05-21

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