GB1293097A - Electronic switching techniques and devices - Google Patents

Electronic switching techniques and devices

Info

Publication number
GB1293097A
GB1293097A GB23210/71A GB2321071A GB1293097A GB 1293097 A GB1293097 A GB 1293097A GB 23210/71 A GB23210/71 A GB 23210/71A GB 2321071 A GB2321071 A GB 2321071A GB 1293097 A GB1293097 A GB 1293097A
Authority
GB
United Kingdom
Prior art keywords
analogue switch
control
signal
gate
ramp
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
GB23210/71A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1293097A publication Critical patent/GB1293097A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/07—Programme control other than numerical control, i.e. in sequence controllers or logic controllers where the programme is defined in the fixed connection of electrical elements, e.g. potentiometers, counters, transistors
    • G05B19/075—Programme control other than numerical control, i.e. in sequence controllers or logic controllers where the programme is defined in the fixed connection of electrical elements, e.g. potentiometers, counters, transistors for delivering a step function, a slope or a continuous function
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B66B1/285—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical with the use of a speed pattern generator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/6877—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the control circuit comprising active elements different from those used in the output circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/693—Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Studio Circuits (AREA)
  • Inverter Devices (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

1293097 Transistor switching circuits WESTINGHOUSE ELECTRIC CORP 19 April 1971 [24 Feb 1970] 23210/71 Heading H3T [Also in Division H2] A control signal for a gate, e.g. analogue switch #1, is produced by feeding a repetitive signal 7 and a function signal 8 to a comparator 3 to produce a width modulated pulse train which applied to the control electrode of the gate. The arrangement gives a slow turn-on or turn-off depending on whether the function signal 8 is a rising or falling ramp. If the comparator output is fed directly to control analogue switch #1, and via a NOT circuit 10 to control analogue switch #2, a slow fade-over from one circuit to another may be obtained. The system may be used in a lift control system in which three different signals are required to control the movement of the lift between floors. Initially unit 27 produces a " 1 " on line LAND and analogue switch #1 is closed. In this condition the motor is controlled by a signal from time ramp generator 28. During the next phase of operation it is required to charge to control from generator 26, and ramp 8 is initiated to open analogue switch #1 and close analogue switch #2, the summed outputs from the two gates changing gradually. During this phase the output from unit 27 changes to a " 1 " on line LAND to enable AND gate 32 and inhibit AND gate 31. In this condition analogue switch #2 is held open by the output from comparator 3<SP>1</SP>. To change to the next phase, generator 8<SP>1</SP> initiates a ramp which opens analogue switch #2 and closes analogue switch #3 to utilize the control signal from a sensor 29.
GB23210/71A 1970-02-24 1971-04-19 Electronic switching techniques and devices Expired GB1293097A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1366070A 1970-02-24 1970-02-24

Publications (1)

Publication Number Publication Date
GB1293097A true GB1293097A (en) 1972-10-18

Family

ID=21761060

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23210/71A Expired GB1293097A (en) 1970-02-24 1971-04-19 Electronic switching techniques and devices

Country Status (7)

Country Link
US (1) US3651892A (en)
JP (1) JPS523546B1 (en)
BE (1) BE763355A (en)
DE (1) DE2107410A1 (en)
FR (1) FR2083101A5 (en)
GB (1) GB1293097A (en)
NL (1) NL7102444A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5436528Y2 (en) * 1973-02-21 1979-11-05
US3919650A (en) * 1973-08-15 1975-11-11 Mi 2 329102 Mark frequency detector circuit
JPS50122837U (en) * 1974-03-22 1975-10-07
JPS5167786U (en) * 1974-11-22 1976-05-28
US4331220A (en) * 1980-11-04 1982-05-25 Westinghouse Electric Corp. Elevator system
JPS59113771A (en) * 1982-12-20 1984-06-30 Mitsubishi Electric Corp Starting and stopping method for power controller
JPS6414324A (en) * 1987-07-07 1989-01-18 Nippon Spindle Mfg Co Ltd Method for regulating acceleration in starting spinning machine
US7078942B2 (en) * 2004-03-18 2006-07-18 Hon Hai Precision Ind. Co., Ltd. Driving apparatus for generating a driving current using PWM

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921247A (en) * 1958-11-03 1960-01-12 Collins Radio Co On-off and proportional control transistor servosystem
US3516518A (en) * 1965-10-13 1970-06-23 Otis Elevator Co Elevator control system
US3449688A (en) * 1966-01-06 1969-06-10 Mc Donnell Douglas Corp Means for improving the operating characteristics of switching devices

Also Published As

Publication number Publication date
JPS523546B1 (en) 1977-01-28
US3651892A (en) 1972-03-28
FR2083101A5 (en) 1971-12-10
NL7102444A (en) 1971-08-26
BE763355A (en) 1971-08-24
DE2107410A1 (en) 1971-09-09
JPS462768A (en) 1971-10-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee