Classifications

• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03K—PULSE TECHNIQUE
  • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
  • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
  • H03K17/74—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of diodes
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03K—PULSE TECHNIQUE
  • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
  • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
  • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
  • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
  • H03K17/68—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors specially adapted for switching AC currents or voltages
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q1/00—Details of selecting apparatus or arrangements
  • H04Q1/18—Electrical details
  • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
  • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
  • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Power Engineering (AREA)
• Interface Circuits In Exchanges (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=9079254

Family Applications (1)

Country Status (7)

Families Citing this family (1)

• 1971
  • 1971-06-24 FR FR7123094A patent/FR2142756B1/fr not_active Expired
• 1972
  • 1972-06-12 CH CH874772A patent/CH565484A5/xx not_active IP Right Cessation
  • 1972-06-13 GB GB2757872A patent/GB1399524A/en not_active Expired
  • 1972-06-14 BE BE784826A patent/BE784826A/xx unknown
  • 1972-06-21 NL NL7208460A patent/NL7208460A/xx unknown
  • 1972-06-22 DE DE19722230652 patent/DE2230652A1/de active Pending
  • 1972-06-23 IT IT2608972A patent/IT959928B/it active

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