GB1467974A - Power supply distribution and control system - Google Patents

Power supply distribution and control system

Info

Publication number
GB1467974A
GB1467974A GB1267074A GB1267074A GB1467974A GB 1467974 A GB1467974 A GB 1467974A GB 1267074 A GB1267074 A GB 1267074A GB 1267074 A GB1267074 A GB 1267074A GB 1467974 A GB1467974 A GB 1467974A
Authority
GB
United Kingdom
Prior art keywords
supply
conductive
pad
triac
thyristor
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
GB1267074A
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.)
Texas Instruments Ltd
Original Assignee
Texas Instruments 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 Texas Instruments Ltd filed Critical Texas Instruments Ltd
Priority to GB1267074A priority Critical patent/GB1467974A/en
Publication of GB1467974A publication Critical patent/GB1467974A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/35—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region
    • H03K3/352—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region the devices being thyristors
    • 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
    • H03K17/72—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 having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/725—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 having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for ac voltages or currents
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches

Landscapes

  • Electronic Switches (AREA)

Abstract

1467974 Touch or proximity switching systems TEXAS INSTRUMENTS Ltd 5 March 1975 [21 March 1974] 12670/74 Heading G1N [Also in Division H2] In a supply distribution and control system in which a semi-conductor switching device 6 is connected to control the supply of power to a load 4 such as a lamp, heater or cooker, the switching device 6 is rendered conductive or non-conductive in response to a low voltage signal isolated from the supply by a proximity or touch responsive switch. When conductive pad 29 is touched or approached by an operator's finger the body capacitance effectively connected across the gate of FET 24 causes the latter to become non-conductive and SCR 17 to be triggered so that current flows through relay winding RLA to close contacts RLA-1. Triac 6 is thus rendered conductive and the positive and negative half cycles of the supply across terminals 1-2 are applied to load 4. As a result of the conduction of thyristor 17 a negative pulse is applied via capacitors 20, 21 to thyristors 15, 16 to turn them off if they are conducting. If DIM pad 27 is touched thyristor 16 is rendered conducting and relay RLB energized so that contacts RLB1 are closed, the triac 6 only conducting during negative half cycles of the supply. When OFF pad 25 is touched thyristor 15 conducts but not thyristors 16, 17 so that triac 6 is not gated on, and the load remains unenergized. An LED 31 is also energized to enable the pads to be located. In addition to the switches 14 a two state switch 33 may be connected in the circuit in parallel with the switches 14. The pads 25, 27, 29 may be covered with a thin insulating layer or include a conductive ring surrounding the pad to provide a resistive operation. A single FET may be provided and its connection to the two state trigger circuit such that successive resistive or capacitive charges at a single conductive pad connected to the FET gate cause the supply to be switched on and off successively. Details of a supply system in a house are schematically described, Figs. 2, 3 (not shown).
GB1267074A 1975-03-05 1975-03-05 Power supply distribution and control system Expired GB1467974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1267074A GB1467974A (en) 1975-03-05 1975-03-05 Power supply distribution and control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1267074A GB1467974A (en) 1975-03-05 1975-03-05 Power supply distribution and control system

Publications (1)

Publication Number Publication Date
GB1467974A true GB1467974A (en) 1977-03-23

Family

ID=10008970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1267074A Expired GB1467974A (en) 1975-03-05 1975-03-05 Power supply distribution and control system

Country Status (1)

Country Link
GB (1) GB1467974A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2148629A (en) * 1983-10-13 1985-05-30 Lutron Electronics Co Wall box dimmer switch with plural remote control switches
GB2154322A (en) * 1984-02-14 1985-09-04 Guy Darell Unwin Switches for standard and table lamps
USRE33504E (en) * 1983-10-13 1990-12-25 Lutron Electronics Co., Inc. Wall box dimer switch with plural remote control switches
GB2396065A (en) * 2002-11-01 2004-06-09 Stephen John Foxwell Lighting control
GB2402820A (en) * 2003-06-12 2004-12-15 David Eric Hampden-Smith Multiway switch controller
CN110460326A (en) * 2019-09-06 2019-11-15 苏州国芯科技股份有限公司 A kind of touch key-press interface circuit and touch key-press monitoring system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2148629A (en) * 1983-10-13 1985-05-30 Lutron Electronics Co Wall box dimmer switch with plural remote control switches
US4563592A (en) * 1983-10-13 1986-01-07 Lutron Electronics Co. Inc. Wall box dimmer switch with plural remote control switches
USRE33504E (en) * 1983-10-13 1990-12-25 Lutron Electronics Co., Inc. Wall box dimer switch with plural remote control switches
GB2154322A (en) * 1984-02-14 1985-09-04 Guy Darell Unwin Switches for standard and table lamps
GB2396065A (en) * 2002-11-01 2004-06-09 Stephen John Foxwell Lighting control
GB2396065B (en) * 2002-11-01 2005-12-28 Stephen John Foxwell Lighting control
GB2402820A (en) * 2003-06-12 2004-12-15 David Eric Hampden-Smith Multiway switch controller
CN110460326A (en) * 2019-09-06 2019-11-15 苏州国芯科技股份有限公司 A kind of touch key-press interface circuit and touch key-press monitoring system
CN110460326B (en) * 2019-09-06 2023-10-13 苏州国芯科技股份有限公司 Touch key interface circuit and touch key monitoring system

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Legal Events

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