GB895654A - Improvements relating to electrical signal attenuators - Google Patents

Improvements relating to electrical signal attenuators

Info

Publication number
GB895654A
GB895654A GB3417158A GB3417158A GB895654A GB 895654 A GB895654 A GB 895654A GB 3417158 A GB3417158 A GB 3417158A GB 3417158 A GB3417158 A GB 3417158A GB 895654 A GB895654 A GB 895654A
Authority
GB
United Kingdom
Prior art keywords
transformer
hall plate
output
electromagnet
oct
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
GB3417158A
Inventor
Reginald Philip Chasmar
Emanuel Cohen
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB3417158A priority Critical patent/GB895654A/en
Publication of GB895654A publication Critical patent/GB895654A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/24—Frequency- independent attenuators
    • H03H7/25—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable
    • H03H7/258—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable using a galvano-magnetic device
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0076—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using galvanomagnetic elements

Landscapes

  • Arrangements For Transmission Of Measured Signals (AREA)
  • Adjustable Resistors (AREA)

Abstract

895,654. Semi-conductor circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Oct. 20, 1959 [Oct. 24. 1958], No. 34171/58. Class 40(6). [Also in Group XXXVI] A Hall plate is used as a signal attenuator. The input signal is applied to terminals 2, 3 and the output taken through transformer T the ratio of the input and output magnitudes being controlled by the field strength of electromagnet 8 which is controlled by rheostat 9. Fig. 2 shows a ferrite housing 21 which contains the electromagnet 8 and which has a central core 22 which supports the Hall plate 1 and, in the top of the housing, a further core 26 on which is the transformer T provided with an electrostatic screen between the windings. The transformer output is taken from a coaxial plug 12. Materials suggested for the Hall plate are germanium, silicon and indium arsenide.
GB3417158A 1958-10-24 1958-10-24 Improvements relating to electrical signal attenuators Expired GB895654A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3417158A GB895654A (en) 1958-10-24 1958-10-24 Improvements relating to electrical signal attenuators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3417158A GB895654A (en) 1958-10-24 1958-10-24 Improvements relating to electrical signal attenuators

Publications (1)

Publication Number Publication Date
GB895654A true GB895654A (en) 1962-05-02

Family

ID=10362273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3417158A Expired GB895654A (en) 1958-10-24 1958-10-24 Improvements relating to electrical signal attenuators

Country Status (1)

Country Link
GB (1) GB895654A (en)

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