GB1063160A - Improvements in or relating to electrical circuits - Google Patents

Improvements in or relating to electrical circuits

Info

Publication number
GB1063160A
GB1063160A GB4483466A GB4483466A GB1063160A GB 1063160 A GB1063160 A GB 1063160A GB 4483466 A GB4483466 A GB 4483466A GB 4483466 A GB4483466 A GB 4483466A GB 1063160 A GB1063160 A GB 1063160A
Authority
GB
United Kingdom
Prior art keywords
pulse
modulated signal
output
outputs
time
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
GB4483466A
Inventor
George Frederick Craven
Antoni Emil Karbowiak
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB1063160A publication Critical patent/GB1063160A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • 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
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
    • H02P5/747—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors mechanically coupled by gearing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Control Of Multiple Motors (AREA)
  • Selective Calling Equipment (AREA)

Abstract

1,063,160. Electric selective signalling. STANDARD TELEPHONES & CABLES Ltd. Dec. 4, 1966 [Dec. 10, 1963], No. 44834/66. Divided out of 1,006,813. Heading G4H. Apparatus for deriving a pulse time-modulated signal (either a pulse width modulated signal or a pulse position modulated signal) indicative of an applied pulse code modulated signal comprises a plurality of transmission paths which are selectively enabled by the digits of the applied pulse code modulated signal for different time intervals. In one embodiment (Fig. 2, not shown), a pulse position modulated output is obtained by applying a binary coded input to switches (13S1-13S4) to open the associated switch when the digit is a. 1 and to close the switch when the digit is a 0. The switches shunt delay lines W W (13DL1-13DL4) having time delays -,-, 2 4 WW » <SP>,</SP>» respectively so that when applied signal 8 16 11 1011 the output pulse is delayed by -W. 16 In a further embodiment (Fig. 6, not shown) the pulse code modulated signal is applied to gates (17GA1-17GA4) which are successively enabled by timing pulses (17T1-17T4) the outputs from the gates being applied to delays (17DL1-17DL4) having successively decreasing delay times so that the outputs from all the delay units appear in coincidence on the inputs to square - wave pulse generators (17GEN1-17GEN4) which deliver a single W W W W square-wave output pulse for time »<SP>,</SP>»<SP>,</SP>»<SP>,</SP>»<SP>,</SP> 2 4 8 16, respectively, each generator being inhibited by a blanking pulse when an earlier generator is delivering an output. The outputs from the generators are combined to give a pulse width modulated output.
GB4483466A 1962-12-21 1963-12-10 Improvements in or relating to electrical circuits Expired GB1063160A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK557962A DK106188C (en) 1962-12-21 1962-12-21 Control coupling for drive units containing two or more asynchronous motors.

Publications (1)

Publication Number Publication Date
GB1063160A true GB1063160A (en) 1967-03-30

Family

ID=8143658

Family Applications (2)

Application Number Title Priority Date Filing Date
GB4483466A Expired GB1063160A (en) 1962-12-21 1963-12-10 Improvements in or relating to electrical circuits
GB48871/63A Expired GB1006813A (en) 1962-12-21 1963-12-11 Improvements in drive assemblies of the kind comprising two or more asynchronous electric motors

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB48871/63A Expired GB1006813A (en) 1962-12-21 1963-12-11 Improvements in drive assemblies of the kind comprising two or more asynchronous electric motors

Country Status (2)

Country Link
DK (1) DK106188C (en)
GB (2) GB1063160A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1278603B (en) * 1966-03-17 1968-09-26 Licentia Gmbh Electrical machine with controllable semiconductors connected in parallel to the winding strings

Also Published As

Publication number Publication date
DK106188C (en) 1967-01-02
GB1006813A (en) 1965-10-06

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