GB1455039A - Circuit arrangement for switching off after a predetermined time - Google Patents

Circuit arrangement for switching off after a predetermined time

Info

Publication number
GB1455039A
GB1455039A GB1675374A GB1675374A GB1455039A GB 1455039 A GB1455039 A GB 1455039A GB 1675374 A GB1675374 A GB 1675374A GB 1675374 A GB1675374 A GB 1675374A GB 1455039 A GB1455039 A GB 1455039A
Authority
GB
United Kingdom
Prior art keywords
transistor
amplifier
switch
contacts
timing
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
GB1675374A
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.)
SABA GmbH
Original Assignee
SABA GmbH
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
Priority claimed from DE19732325277 external-priority patent/DE2325277C3/en
Application filed by SABA GmbH filed Critical SABA GmbH
Publication of GB1455039A publication Critical patent/GB1455039A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
    • G04F1/005—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers using electronic timing, e.g. counting means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/0277—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof according to available power supply, e.g. switching off when a low battery condition is detected
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Electric Clocks (AREA)
  • Electronic Switches (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

1455039 Transistor switching circuits; time control of receivers SABA SCHWARZWAELDER APPARATE-BAU-ANSTALT AUGUST SCHWER SOEHNE GmbH 17 April 1974 [18 May 1973] 16753/74 Headings H3T and H3Q In a circuit for switching off electronic equipment such as a radio 1 after a predetermined time by an electronic timer started by a keying switch 4 the timer comprises a first amplifier 13 having an integrating network including a capacitor 25 and a second amplifier 14 having its inverting input connected to the output of the first amplifier 13 and its output connected via a resistor 29 in a feedback path to its noninvesting input and the output of the second amplifier 14 is connected to the base of a first transistor 33 whose collector is connectible to the base of a second transistor 27 which has its collectoremitter path connected in parallel with the main on-off switch 2 of the electronic equipment 1. As shown the timing period is started by pressing the key switch 4 so as to momentarily engage contacts 7-9, c and d the movable contact of the switch 4 then returning to engage contacts 7-9 b and c. The collector-emitter of the transistor 27 is momentarily bridged by contacts 8c and 8d so as to turn on the radio 1 and a transistor 11 which connects the battery 3 to a stabilizing circuit 12 which stabilizes the supply voltage for the timing circuit at half the battery voltage UB. The momentary contact of contacts 7c and 7d causes a potential lower than a reference potential applied to the inverting input of an operational amplifier 13 to be applied to the non inverting input of the amplifier 13. The subsequent engagement of the contacts 9c and b cause transistor 27 to turn on so as to maintain the radio 1 and the transistor 11 on. After the predetermined time the output voltage determined by 25 and 24 from the amplifier 13 reaches a predetermined value and the output from the amplifier 14 changes positive. This causes transistor 33 to turn on to switch off the transistor 27 and the radio 1 and so end the timing period. During the timing period which can be an hour an ammeter 28 indicates the time still remaining until switch off. If the slider of the potentiometer 24 is set to its upper stop the meter 28 reads half the battery voltage when the timing circuit is switched on so that the meter gives an indication of the on load condition of the battery 3. In the off position 2 of the timing switch 4 the meter 28 is connected as a timing indication with contacts 5a and 6a connected to a discriminator voltage.
GB1675374A 1973-05-18 1974-04-17 Circuit arrangement for switching off after a predetermined time Expired GB1455039A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732325277 DE2325277C3 (en) 1973-05-18 Circuit arrangement for delayed switching off

Publications (1)

Publication Number Publication Date
GB1455039A true GB1455039A (en) 1976-11-10

Family

ID=5881378

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1675374A Expired GB1455039A (en) 1973-05-18 1974-04-17 Circuit arrangement for switching off after a predetermined time

Country Status (7)

Country Link
BE (1) BE813803A (en)
CH (1) CH564229A5 (en)
DK (1) DK139287C (en)
FR (1) FR2230124B3 (en)
GB (1) GB1455039A (en)
IT (1) IT1019615B (en)
NL (1) NL7404697A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136616A (en) * 1983-02-25 1984-09-19 Philips Electronic Associated Automatic control of energisation of battery powered receiving apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075214B1 (en) * 1981-09-17 1989-05-31 Dangschat, Rainer, Dipl.-Ing. (FH) Method of switching a television receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136616A (en) * 1983-02-25 1984-09-19 Philips Electronic Associated Automatic control of energisation of battery powered receiving apparatus

Also Published As

Publication number Publication date
DK139287B (en) 1979-01-22
BE813803A (en) 1974-08-16
DK139287C (en) 1979-07-02
CH564229A5 (en) 1975-07-15
FR2230124B3 (en) 1977-03-25
NL7404697A (en) 1974-11-20
DE2325277A1 (en) 1974-11-28
DE2325277B2 (en) 1976-12-23
IT1019615B (en) 1977-11-30
FR2230124A1 (en) 1974-12-13

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Legal Events

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