GB1108154A - Improvements relating to frequency control circuits - Google Patents

Improvements relating to frequency control circuits

Info

Publication number
GB1108154A
GB1108154A GB18849/64A GB1884964A GB1108154A GB 1108154 A GB1108154 A GB 1108154A GB 18849/64 A GB18849/64 A GB 18849/64A GB 1884964 A GB1884964 A GB 1884964A GB 1108154 A GB1108154 A GB 1108154A
Authority
GB
United Kingdom
Prior art keywords
counter
pulses
counters
circuit
output
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
GB18849/64A
Inventor
Andrzej Marcin Piechowski
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB18849/64A priority Critical patent/GB1108154A/en
Priority to FR16015A priority patent/FR1433097A/en
Publication of GB1108154A publication Critical patent/GB1108154A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03B21/00—Generation of oscillations by combining unmodulated signals of different frequencies
    • H03B21/01—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies
    • H03B21/02—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies by plural beating, i.e. for frequency synthesis ; Beating in combination with multiplication or division of frequency
    • H03B21/025—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies by plural beating, i.e. for frequency synthesis ; Beating in combination with multiplication or division of frequency by repeated mixing in combination with division of frequency only
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
    • G06F7/68—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers using pulse rate multipliers or dividers pulse rate multipliers or dividers per se
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/22—Controlling the speed digitally using a reference oscillator, a speed proportional pulse rate feedback and a digital comparator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computing Systems (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Power Engineering (AREA)
  • Control Of Multiple Motors (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

1,108,154. Electronic counters. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 18 June, 1965 [6 May, 1964], No. 18849/64. Heading G4A. [Also in Division G3] According to the number stored in a first counter B5-B8, so a proportion of the pulses applied to a second counter B1-B4 are passed to an output terminal. Both counters are of binary-coded decimal type with different feedback arrangements, whereby the first is weighted 1224 and the second 1125. Carry between binary stages is effected over Q terminals and pulse outputs to AND gates A1-A4 is effected over P terminals, the counters being arranged for this purpose in opposite sense. The circuit shown represents the first decimal place but provision may be made by carry from B4 and B8 for subsequent decimal places. The first or controlling counter may be reversible (Fig. 13, not shown) as described in Specification 1,108,153. The apparatus may be used in a retro-active system, Fig. 14, to maintain the speed of a motor M at a specified rate. Feed-back loop 3 provides a first degree of control. A finer control is provided by pulse generator 4, the output of which over a 1- second period is stored in control counter 5211. This then controls the output of an oscillator and main counter 1224 to feed pulses to circuit 5 which also receives pulses from generator 4. In the manner described in Specification 1,098,457, the circuit 5 deletes coincident or corresponding pulses so as to drive counter 9 forwards or backwards. A digital-to-analogue converter 10 and amplifier 2 then complete the loop to speed or slow the motor as necessary.
GB18849/64A 1964-05-06 1964-05-06 Improvements relating to frequency control circuits Expired GB1108154A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB18849/64A GB1108154A (en) 1964-05-06 1964-05-06 Improvements relating to frequency control circuits
FR16015A FR1433097A (en) 1964-05-06 1965-05-06 Improvements in frequency control circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18849/64A GB1108154A (en) 1964-05-06 1964-05-06 Improvements relating to frequency control circuits

Publications (1)

Publication Number Publication Date
GB1108154A true GB1108154A (en) 1968-04-03

Family

ID=10119454

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18849/64A Expired GB1108154A (en) 1964-05-06 1964-05-06 Improvements relating to frequency control circuits

Country Status (1)

Country Link
GB (1) GB1108154A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068713A2 (en) * 1981-06-15 1983-01-05 Matsushita Electric Industrial Co., Ltd. Sewing machine having a digital command circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068713A2 (en) * 1981-06-15 1983-01-05 Matsushita Electric Industrial Co., Ltd. Sewing machine having a digital command circuit
EP0068713A3 (en) * 1981-06-15 1983-05-04 Matsushita Electric Industrial Co., Ltd. Sewing machine having a digital command circuit

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