GB1396135A - Frequency-division multiplex carrier frequency communication systems - Google Patents

Frequency-division multiplex carrier frequency communication systems

Info

Publication number
GB1396135A
GB1396135A GB3961272A GB3961272A GB1396135A GB 1396135 A GB1396135 A GB 1396135A GB 3961272 A GB3961272 A GB 3961272A GB 3961272 A GB3961272 A GB 3961272A GB 1396135 A GB1396135 A GB 1396135A
Authority
GB
United Kingdom
Prior art keywords
frequency
oscillator
control voltage
control
detector
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
Application number
GB3961272A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1396135A publication Critical patent/GB1396135A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
    • H03B5/366—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device and comprising means for varying the frequency by a variable voltage or current
    • H03B5/368—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device and comprising means for varying the frequency by a variable voltage or current the means being voltage variable capacitance diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Transmitters (AREA)
  • Radio Relay Systems (AREA)

Abstract

1396135 Multiplex systems SIEMENS AG 25 Aug 1972 [27 Aug 1971] 39612/72 Heading H4R In a frequency division multiplex carrier frequency transmission system each carrier or pilot frequency is generated by a respective phase locked loop oscillator controlled by a common control frequency. As described, the carriers TG1-TG3 of the tertiary group, and QG1, QG2 of the quaternary group and the quaternary group pilot QGPil, are generated by the phase locked loop generator Tr. Each generator comprises, as shown in Fig. 2, an oscillator Os 2 whose frequency is controlled by a reactance diode Var fed with a D.C. control voltage derived by comparison of the common control frequeney f st and a divided output of the oscillator in a phase comparator D. The control voltage U is also applied to two threshold detectors G1 and G2, direct to one G1, and via a differentiation circuit to the other G2. The first threshold detector G1 detects excursions of the control voltage corresponding to a frequency deviation of the oscillator Os 2 outside the pull-in range, while the second threshold detector detects rapid changes in the control voltage resulting from a gross error in the oscillator Os 2 frequency which causes cyclic phase changes which would switch detector G1 continuously on and off. The two detector outputs are connected to control gates on the oscillator output to inhibit the output and raise an alarm if the signal is of incorrect frequency. Circuits of the threshold detectors, Fig. 5 (not shown), and the oscillator control circuit, Fig. 6 (not shown), are described.
GB3961272A 1971-08-27 1972-08-25 Frequency-division multiplex carrier frequency communication systems Expired GB1396135A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712143075 DE2143075C3 (en) 1971-08-27 1971-08-27 Carrier frequency system

Publications (1)

Publication Number Publication Date
GB1396135A true GB1396135A (en) 1975-06-04

Family

ID=5818006

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3961272A Expired GB1396135A (en) 1971-08-27 1972-08-25 Frequency-division multiplex carrier frequency communication systems

Country Status (8)

Country Link
JP (1) JPS5225205B2 (en)
CH (1) CH551722A (en)
DE (1) DE2143075C3 (en)
FR (1) FR2151917A5 (en)
GB (1) GB1396135A (en)
IT (1) IT964262B (en)
NL (1) NL170908C (en)
SE (1) SE386791B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10998909B1 (en) 2019-09-12 2021-05-04 Dialog Semiconductor B.V. Sensing device comprising a phase locked loop circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5038123B2 (en) * 1972-06-01 1975-12-08
JPS50140008A (en) * 1974-04-26 1975-11-10

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10998909B1 (en) 2019-09-12 2021-05-04 Dialog Semiconductor B.V. Sensing device comprising a phase locked loop circuit

Also Published As

Publication number Publication date
DE2143075A1 (en) 1973-03-01
DE2143075B2 (en) 1973-12-13
JPS4835709A (en) 1973-05-26
SE386791B (en) 1976-08-16
NL170908B (en) 1982-08-02
NL7211605A (en) 1973-03-01
CH551722A (en) 1974-07-15
NL170908C (en) 1983-01-03
IT964262B (en) 1974-01-21
FR2151917A5 (en) 1973-04-20
JPS5225205B2 (en) 1977-07-06
DE2143075C3 (en) 1974-07-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee