IT1089823B - Dispositivo di emissione e di ricezione di impulsi telefonici codificati - Google Patents

Dispositivo di emissione e di ricezione di impulsi telefonici codificati

Info

Publication number
IT1089823B
IT1089823B IT52142/76A IT5214276A IT1089823B IT 1089823 B IT1089823 B IT 1089823B IT 52142/76 A IT52142/76 A IT 52142/76A IT 5214276 A IT5214276 A IT 5214276A IT 1089823 B IT1089823 B IT 1089823B
Authority
IT
Italy
Prior art keywords
reception device
pulse emission
coded telephone
telephone pulse
coded
Prior art date
Application number
IT52142/76A
Other languages
English (en)
Original Assignee
Ass Ouvriers Instr Precision
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
Priority claimed from FR7534824A external-priority patent/FR2331913A2/fr
Application filed by Ass Ouvriers Instr Precision filed Critical Ass Ouvriers Instr Precision
Application granted granted Critical
Publication of IT1089823B publication Critical patent/IT1089823B/it

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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/586—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using an electronic circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1213—Frequency selective two-port networks using amplifiers with feedback using transistor amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1217—Frequency selective two-port networks using amplifiers with feedback using a plurality of operational amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier
    • H03H11/1286—Sallen-Key biquad
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/025—Filter arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/04—Distributors combined with modulators or demodulators
    • H04J3/047—Distributors with transistors or integrated circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Networks Using Active Elements (AREA)
IT52142/76A 1975-11-14 1976-11-12 Dispositivo di emissione e di ricezione di impulsi telefonici codificati IT1089823B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7534824A FR2331913A2 (fr) 1972-01-04 1975-11-14 Dispositif d'emission et de reception d'impulsions telephoniques codees

Publications (1)

Publication Number Publication Date
IT1089823B true IT1089823B (it) 1985-06-18

Family

ID=9162420

Family Applications (1)

Application Number Title Priority Date Filing Date
IT52142/76A IT1089823B (it) 1975-11-14 1976-11-12 Dispositivo di emissione e di ricezione di impulsi telefonici codificati

Country Status (5)

Country Link
BE (1) BE848285R (it)
CH (1) CH618557A5 (it)
DE (1) DE2647641A1 (it)
GB (1) GB1562916A (it)
IT (1) IT1089823B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3231919A1 (de) * 1982-08-27 1984-03-01 Robert Bosch Gmbh, 7000 Stuttgart Aktive niederfrequenz-tiefpassfilteranordnung

Also Published As

Publication number Publication date
BE848285R (fr) 1977-05-12
GB1562916A (en) 1980-03-19
CH618557A5 (en) 1980-07-31
DE2647641A1 (de) 1977-05-26

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