SE7704682L - KIT AND CONNECTION DEVICE FOR DISCONNECTING A BIG PULSE - Google Patents

KIT AND CONNECTION DEVICE FOR DISCONNECTING A BIG PULSE

Info

Publication number
SE7704682L
SE7704682L SE7704682A SE7704682A SE7704682L SE 7704682 L SE7704682 L SE 7704682L SE 7704682 A SE7704682 A SE 7704682A SE 7704682 A SE7704682 A SE 7704682A SE 7704682 L SE7704682 L SE 7704682L
Authority
SE
Sweden
Prior art keywords
activation
switch
relay
signal line
differentiator
Prior art date
Application number
SE7704682A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE415067B (en
Inventor
D Neumann
W Herrmann
Original Assignee
Neumann Elektronik 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 Neumann Elektronik Gmbh filed Critical Neumann Elektronik Gmbh
Publication of SE7704682L publication Critical patent/SE7704682L/en
Publication of SE415067B publication Critical patent/SE415067B/en

Links

Classifications

    • 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
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Noise Elimination (AREA)
  • Mechanical Operated Clutches (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

To blank out noise pulses generated by activation and de-activation operations in a signal line to which direct current and alternating current can be applied simultaneously and which leads via an amplifier (V) to a loudspeaker (L), a circuit arrangement is proposed in which a relay (B) is provided which has contacts (b) inserted into the signal line. A switch (S) which initiates the switching of the relay contacts (b) and which has a delay component (R1, C1) connected downstream is disposed in the activation line of the relay (B). A pulse generator is connected to the output of the switch (S) which, when the switch (S) is opened and closed, transmits an adjustable-width square-wave pulse which is fed to a gate circuit (A, a) disposed between the amplifier (V) and the loudspeaker (L). The pulse generator has two parallel-connected branches leading to a monostable multivibrator, each branch containing a differentiator. In one of the branches, a memory circuit is connected upstream of the differentiator which transmits a voltage signal when the switch (S) is opened. Due to the circuit arrangement, the noise pulses in the signal line can be blanked out reliably even when activation and de-activation operations follow one another in rapid succession, for example in intercom systems. <IMAGE>
SE7704682A 1976-04-28 1977-04-22 CONNECTOR FOR DISCONNECTING LARGE PULSE SE415067B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2618524A DE2618524C3 (en) 1976-04-28 1976-04-28 Circuit arrangement for blanking interference pulses

Publications (2)

Publication Number Publication Date
SE7704682L true SE7704682L (en) 1977-10-29
SE415067B SE415067B (en) 1980-09-01

Family

ID=5976440

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7704682A SE415067B (en) 1976-04-28 1977-04-22 CONNECTOR FOR DISCONNECTING LARGE PULSE

Country Status (7)

Country Link
AT (1) AT360088B (en)
CH (1) CH614573A5 (en)
DE (1) DE2618524C3 (en)
DK (1) DK143678C (en)
FI (1) FI65521C (en)
NO (1) NO143600C (en)
SE (1) SE415067B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2737377C2 (en) * 1977-08-16 1983-12-29 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for suppressing crackling noises during switching processes in amplifier systems
DE2807318A1 (en) * 1978-02-21 1979-08-30 Bosch Gmbh Robert Circuit blocking interference clicks during control resetting - uses comb-shaped sliding switch to generate DC voltage pulses to block output amplifier
DE3006628A1 (en) * 1980-02-22 1981-08-27 Robert Bosch Gmbh, 7000 Stuttgart Suppression circuit for loudspeaker switching transients - uses photo resistor to eliminate switching transients being transmitted as audio effects
FR2566206B1 (en) * 1984-06-18 1990-07-13 Thomson Lgt DEVICE FOR LIMITING THE TRANSMISSION POWER OF RADIO WAVES TRANSMITTERS
DE3930068A1 (en) * 1989-09-09 1991-03-21 Rheydt Kabelwerk Ag Audio information transmission system - has noise suppression stage at loudspeaker end for eliminating switching noise

Also Published As

Publication number Publication date
SE415067B (en) 1980-09-01
FI771012A7 (en) 1977-10-29
DK143678C (en) 1982-04-19
NO771194L (en) 1977-10-31
ATA176177A (en) 1980-05-15
DE2618524A1 (en) 1977-11-10
DE2618524C3 (en) 1980-08-14
AT360088B (en) 1980-12-29
FI65521B (en) 1984-01-31
CH614573A5 (en) 1979-11-30
NO143600B (en) 1980-12-01
DE2618524B2 (en) 1979-12-06
DK143678B (en) 1981-09-21
NO143600C (en) 1981-03-11
DK168177A (en) 1977-10-29
FI65521C (en) 1984-05-10

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