GB1178381A - Improvements in or relating to Electrical Switching Circuitry. - Google Patents

Improvements in or relating to Electrical Switching Circuitry.

Info

Publication number
GB1178381A
GB1178381A GB52066A GB52066A GB1178381A GB 1178381 A GB1178381 A GB 1178381A GB 52066 A GB52066 A GB 52066A GB 52066 A GB52066 A GB 52066A GB 1178381 A GB1178381 A GB 1178381A
Authority
GB
United Kingdom
Prior art keywords
switch
switches
channel
contacts
input
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
GB52066A
Inventor
Leonard Hands
Keith Wilfred Reading
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.)
Hawker Siddeley Dynamics Ltd
Original Assignee
Hawker Siddeley Dynamics 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 Hawker Siddeley Dynamics Ltd filed Critical Hawker Siddeley Dynamics Ltd
Priority to GB52066A priority Critical patent/GB1178381A/en
Publication of GB1178381A publication Critical patent/GB1178381A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • G08C15/06—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division
    • G08C15/08—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division the signals being represented by amplitude of current or voltage in transmission link
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electronic Switches (AREA)

Abstract

1,178,381. Measuring currents and voltages. HAWKER SIDDELEY DYNAMICS Ltd. Jan.5, 1967 [Jan. 5, 1966], No.520/66. Heading G1U. To reduce the effect of capacitive leakage current across the open contacts of switches 11 Fig. 2 in the unused channels of a number of channels connected in parallel to the input of a common amplifier 13, a second switch 18 is included in each channel and this switch, when "open", connects the portions 21 of the channel conductors between the switches to a guard rail 16 of the amplifier which in turn is connected through the switch 14 in the one channel being used to an earthed terminal of the signal source. A guard rail 20 for the conductors 21 between the switches is connected to the amplifier guard 16, and in a modification where the main switch 11 is arranged to transfer the input signal to an alternative line through contacts 85, Fig. 5, should the switch 18 operate before switch 11, the rate of discharge of a capacitor 22 connected across the input channel which is thereby short circuited is reduced by a resistor 26 connected between the contacts 19 of the switch 18. Alternatively the short circuiting of the capacitor is prevented by placing the switches 18 on the input side of the main switches 11 and reversing the connection of switches 18 so that their movable contacts are connected to the inputs of the main switches as depicted in Fig.4 (not shown). When semiconductors are employed as switching elements, the leakage conductance is also reduced by the circuit described.
GB52066A 1966-01-05 1966-01-05 Improvements in or relating to Electrical Switching Circuitry. Expired GB1178381A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB52066A GB1178381A (en) 1966-01-05 1966-01-05 Improvements in or relating to Electrical Switching Circuitry.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB52066A GB1178381A (en) 1966-01-05 1966-01-05 Improvements in or relating to Electrical Switching Circuitry.

Publications (1)

Publication Number Publication Date
GB1178381A true GB1178381A (en) 1970-01-21

Family

ID=9705810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52066A Expired GB1178381A (en) 1966-01-05 1966-01-05 Improvements in or relating to Electrical Switching Circuitry.

Country Status (1)

Country Link
GB (1) GB1178381A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172115A (en) * 1985-03-07 1986-09-10 Fki Crypton Limited Ignition analysers
FR2672451A1 (en) * 1991-01-31 1992-08-07 Pioneer Electronic Corp MASS INSULATION CIRCUIT FOR ELECTRONIC CIRCUITS.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172115A (en) * 1985-03-07 1986-09-10 Fki Crypton Limited Ignition analysers
FR2672451A1 (en) * 1991-01-31 1992-08-07 Pioneer Electronic Corp MASS INSULATION CIRCUIT FOR ELECTRONIC CIRCUITS.

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