CH618557A5 - Telephone installation including for each telephone set a device for transmitting and receiving coded telephone pulses - Google Patents

Telephone installation including for each telephone set a device for transmitting and receiving coded telephone pulses Download PDF

Info

Publication number
CH618557A5
CH618557A5 CH1398876A CH1398876A CH618557A5 CH 618557 A5 CH618557 A5 CH 618557A5 CH 1398876 A CH1398876 A CH 1398876A CH 1398876 A CH1398876 A CH 1398876A CH 618557 A5 CH618557 A5 CH 618557A5
Authority
CH
Switzerland
Prior art keywords
demodulation
telephone
operational amplifier
active
modulation
Prior art date
Application number
CH1398876A
Other languages
English (en)
French (fr)
Inventor
Lucien Pierre Emile Prudhon
Jean Pierre Georges Charil
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
Publication of CH618557A5 publication Critical patent/CH618557A5/fr

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)
CH1398876A 1975-11-14 1976-11-05 Telephone installation including for each telephone set a device for transmitting and receiving coded telephone pulses CH618557A5 (en)

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
CH618557A5 true CH618557A5 (en) 1980-07-31

Family

ID=9162420

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1398876A CH618557A5 (en) 1975-11-14 1976-11-05 Telephone installation including for each telephone set a device for transmitting and receiving coded telephone pulses

Country Status (5)

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

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
IT1089823B (it) 1985-06-18
GB1562916A (en) 1980-03-19
DE2647641A1 (de) 1977-05-26

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