DE750716C - Circuit arrangement for the reception of wireless messages and the simultaneous recording of a special signal (emergency call signal or other message) on another wave - Google Patents
Circuit arrangement for the reception of wireless messages and the simultaneous recording of a special signal (emergency call signal or other message) on another waveInfo
- Publication number
- DE750716C DE750716C DE1936750716D DE750716DD DE750716C DE 750716 C DE750716 C DE 750716C DE 1936750716 D DE1936750716 D DE 1936750716D DE 750716D D DE750716D D DE 750716DD DE 750716 C DE750716 C DE 750716C
- Authority
- DE
- Germany
- Prior art keywords
- intermediate frequency
- signal
- reception
- antenna
- circuit arrangement
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
- H04L15/24—Apparatus or circuits at the receiving end
- H04L15/26—Apparatus or circuits at the receiving end operating only on reception of predetermined code signals, e.g. distress signals, party-line call signals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
- B61G11/00—Buffers
- B61G11/14—Buffers absorbing shocks by mechanical friction action; Combinations of mechanical shock-absorbers and springs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- Transmitters (AREA)
- Circuits Of Receivers In General (AREA)
Description
Die Erfindung betrifft eine Schaltungsanordnung· für den Empfang drahtloser Nachrichten und die gleichzeitige Aufnahme eines besonderen Signals (Notrufsignals oder weiterer Nachricht) auf anderer Welle.The invention relates to a circuit arrangement for receiving wireless messages and the simultaneous recording of a special signal (emergency signal or other Message) on another wave.
Als Zwischenfrequenz wird beim Überlagerungsempfang im allgemeinen eine konstante. Frequenz verwandt, beispielsweise bei Kurzwellenempfängern für die Aufnahme der 50-m-In the case of heterodyne reception, the intermediate frequency is generally a constant one. Frequency, for example with shortwave receivers for recording the 50 m
to Wellen eine Welle von einigen room. Es ist bekannt, bei solchen Empfängern den Zwischenfrequenzteü seinerseits zum Empfang im Mittelwellenbereich zu benutzen, d. h. eine Umschaltmöglichkeit von kurzen auf lange Wellen dadurch zu ermöglichen, daß bei Kurzwellenempfang eine Überlagerungsschaltung und bei Langwellenempfang der Zwischenfrequenzteil des Kurzwellenempfängers benutzt wird. Weiterhin ist es bekannt, eine Anzahl von Empfangsmitteln, z. B. eine Antenne und/ oder Verstärker, gemeinschaftlich zum gleichzeitigen Empfang mehrerer Nachrichten zu verwenden.to waves a wave from some room. It is known to use the intermediate frequency part in such receivers in turn to use for reception in the medium wave range, d. H. an option to switch from short to long To enable waves by having a superimposing circuit for shortwave reception and the intermediate frequency part of the shortwave receiver is used for long wave reception will. Furthermore, it is known to have a number of receiving means, e.g. B. an antenna and / or amplifier, jointly to receive several messages at the same time use.
Die Erfindung ist dadurch gekennzeichnet, daß zum Empfang der Nachrichten ein über den gewünschten Empfangswellenbereich abstimmbarer Überlagerungsempfänger verwendet wird, dessen Zwischenfrequenz so gewählt ist, daß sie mit der außerhalb des Empfangswellenbereiches liegenden Trägerfrequenz des besonderen Signals übereinstimmt und daß die Antenne sowohl mit dem Eingangskreis des Überlagerungsteils als auch mit dem Zwischenfrequenzteil verbunden ist.The invention is characterized in that an over to receive the messages the desired reception wave range tunable heterodyne receiver used is, whose intermediate frequency is chosen so that it is outside of the reception wave range lying carrier frequency of the particular signal and that the antenna corresponds to both the input circuit of the superposition part and is connected to the intermediate frequency part.
Die Abbildung zeigt die erfindungsgemäße Schaltungsanordnung. Ein Kurzwellenempfänger, der mit Antennen! verbunden ist, besteht aus dem Überlagerungsteil 1, in dem eine hochfrequente Verstärkung und Überlagerung der empfangenen Frequenz erfolgt, und einem Zwischenfrequenzteil 2, in dem eine Verstärkung und Gleichrichtung der erzeugten Zwischenfrequenz vorgenommen wird. Die Zwischenfrequenz wird nun auf die Frequenz verlegt, für die eine weitere Empfangsbereitschaft bestehen soll, und, die Antenne ^i über einThe figure shows the circuit arrangement according to the invention. A shortwave receiver the one with antennas! is connected, exists from the superimposition part 1, in which a high-frequency amplification and superposition the received frequency takes place, and an intermediate frequency part 2, in which an amplification and rectification of the generated intermediate frequency is carried out. The intermediate frequency is now relocated to the frequency for which a further readiness to receive shall exist, and, the antenna ^ i about a
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE750716T | 1936-10-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE750716C true DE750716C (en) | 1945-01-26 |
Family
ID=6544118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1936750716D Expired DE750716C (en) | 1936-10-07 | 1936-10-07 | Circuit arrangement for the reception of wireless messages and the simultaneous recording of a special signal (emergency call signal or other message) on another wave |
Country Status (6)
Country | Link |
---|---|
US (1) | US2195888A (en) |
BE (1) | BE382543A (en) |
DE (1) | DE750716C (en) |
FR (1) | FR827205A (en) |
GB (1) | GB490485A (en) |
NL (1) | NL47611C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE764713C (en) * | 1938-11-12 | 1953-06-08 | Aeg | Method for transmitting a call signal to a receiver for frequency-modulated oscillations that is already connected to another transmitter |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE392979C (en) * | 1922-06-25 | 1924-03-31 | Erwin Kindler | Transmitter and receiver circuit for multiple telegraphy and telephony on one wave |
FR699825A (en) * | 1930-07-18 | 1931-02-20 | Device for adapting a radio receiver to receiving waves that it cannot receive directly | |
CH169877A (en) * | 1933-09-07 | 1934-06-15 | Komet Radio A G | Additional device for radio receivers to expand the waveband to include long waves. |
DE600193C (en) * | 1932-07-02 | 1935-09-28 | Telefunken Gmbh | Device for displaying both the flight target direction by means of reception on longer waves and the landing field strength by means of reception of ultrashort waves |
-
1931
- 1931-09-08 BE BE382543D patent/BE382543A/xx unknown
-
1936
- 1936-10-07 DE DE1936750716D patent/DE750716C/en not_active Expired
-
1937
- 1937-09-24 NL NL84283A patent/NL47611C/xx active
- 1937-09-28 FR FR827205D patent/FR827205A/en not_active Expired
- 1937-10-05 GB GB26963/37A patent/GB490485A/en not_active Expired
- 1937-10-06 US US167519A patent/US2195888A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE392979C (en) * | 1922-06-25 | 1924-03-31 | Erwin Kindler | Transmitter and receiver circuit for multiple telegraphy and telephony on one wave |
FR699825A (en) * | 1930-07-18 | 1931-02-20 | Device for adapting a radio receiver to receiving waves that it cannot receive directly | |
DE600193C (en) * | 1932-07-02 | 1935-09-28 | Telefunken Gmbh | Device for displaying both the flight target direction by means of reception on longer waves and the landing field strength by means of reception of ultrashort waves |
CH169877A (en) * | 1933-09-07 | 1934-06-15 | Komet Radio A G | Additional device for radio receivers to expand the waveband to include long waves. |
Also Published As
Publication number | Publication date |
---|---|
FR827205A (en) | 1938-04-21 |
NL47611C (en) | 1940-01-15 |
US2195888A (en) | 1940-04-02 |
GB490485A (en) | 1938-08-16 |
BE382543A (en) | 1931-10-31 |
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