GB1086187A - Improvements in electronic automatic control systems - Google Patents

Improvements in electronic automatic control systems

Info

Publication number
GB1086187A
GB1086187A GB1278465A GB1278465A GB1086187A GB 1086187 A GB1086187 A GB 1086187A GB 1278465 A GB1278465 A GB 1278465A GB 1278465 A GB1278465 A GB 1278465A GB 1086187 A GB1086187 A GB 1086187A
Authority
GB
United Kingdom
Prior art keywords
oscillator
comparator
control
output
frequency
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
GB1278465A
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Publication of GB1086187A publication Critical patent/GB1086187A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/02—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform
    • H03K4/026—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform using digital techniques
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/16—Members, e.g. consoles, for attachment to the wall to support girders, beams, or the like carrying forms or moulds for floors, lintels, or transoms
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B5/00—Anti-hunting arrangements
    • G05B5/01—Anti-hunting arrangements electric
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass
    • 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
    • H03L7/08—Details of the phase-locked loop
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/12—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a scanning signal
    • 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
    • H03L7/20—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a harmonic phase-locked loop, i.e. a loop which can be locked to one of a number of harmonically related frequencies applied to it

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Semiconductor Integrated Circuits (AREA)

Abstract

1,086,187. Automatic frequency control; staircase generating circuits. COMPAGNIE FRANCAISE THOMSON - HOUSTON - HOTCHKISS BRANDT. March 25, 1965 [March 27, 1964], No. 12784/65. Headings H3A and H3P. In a retro-active control system, e.g. an automatic frequency control system, having a search circuit for facilitating initial locking in, the control signal from the search circuit is maintained after locking in to enable a low level of the retro-active control signal to be employed. As described the output from an oscillator 1, Fig. 4, is fed, together with that from a reference oscillator 3, to a frequency comparator 2, the resulting error signal output being fed to control a reactance element 4, e.g. a diode, a valve or a transistor, in the resonant circuit of the oscillator 1. If the frequency of the oscillator 1 lies outside the range of the comparator 2, a staircase generator 6 is switched on to provide a sweep voltage for the reactance 4. When the oscillator 1 comes within the control range, the output from comparator 2 stops the staircase generator, to provide a constant voltage which is then added to that from comparator 2 to control element 4. The staircase generator, Fig. 1 (not shown) comprises a pulse generator 1 feeding a binary divider chain (21, 22 . . . 2n), the output from each stage being half the frequency and twice the amplitude of that from the previous stage. These outputs are then summed in an adding circuit (40), e.g. a resistive network, Fig. 3 (not shown).
GB1278465A 1964-03-27 1965-03-25 Improvements in electronic automatic control systems Expired GB1086187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR969012A FR1409741A (en) 1964-03-27 1964-03-27 Improvements to electronic devices and processes of servo systems

Publications (1)

Publication Number Publication Date
GB1086187A true GB1086187A (en) 1967-10-04

Family

ID=8826582

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1278465A Expired GB1086187A (en) 1964-03-27 1965-03-25 Improvements in electronic automatic control systems

Country Status (5)

Country Link
BE (1) BE661349A (en)
DE (1) DE1463036B2 (en)
FR (1) FR1409741A (en)
GB (1) GB1086187A (en)
SE (1) SE313360B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL164164C (en) * 1970-09-24 1980-11-17 Philips Nv WIDEBAND ADJUSTABLE FREQUENCY GENERATOR.
FR2295622A1 (en) * 1974-10-25 1976-07-16 Thomson Csf RESEARCH AND OSCILLATOR PHASE LOOP WITH SUCH A LOOP
DE2938965C2 (en) * 1979-09-26 1982-10-21 Siemens AG, 1000 Berlin und 8000 München PCM regenerator

Also Published As

Publication number Publication date
FR1409741A (en) 1965-09-03
SE313360B (en) 1969-08-11
DE1463036A1 (en) 1968-11-28
BE661349A (en) 1965-09-20
DE1463036B2 (en) 1973-07-26

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