GB1302272A - - Google Patents

Info

Publication number
GB1302272A
GB1302272A GB972070A GB1302272DA GB1302272A GB 1302272 A GB1302272 A GB 1302272A GB 972070 A GB972070 A GB 972070A GB 1302272D A GB1302272D A GB 1302272DA GB 1302272 A GB1302272 A GB 1302272A
Authority
GB
United Kingdom
Prior art keywords
terminals
adjusted
film
deposited
conductive
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
GB972070A
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 filed Critical
Publication of GB1302272A publication Critical patent/GB1302272A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49099—Coating resistive material on a base

Abstract

1302272 Attenuators WELWYN ELECTRIC Ltd 19 April 1971 [27 Feb 1970 9 Feb 1971] 9720/70 and 4249/71 Heading HIS To make a flat film T attenuator conductive terminal areas ABC are deposited on an insulating substrate together with a T-shaped resistive film PN which has a conductive film M deposited in electrical contact with it. In the equivalent circuit P is represented by two series resistors R1, R2, M by the junction and N by the resistor R3. P is adjusted first by removing part of the film, and when N is adjusted the value of P is not affected. In an embodiment (Fig. 3a) terminals 1, 2, 3, conductive portion 7 and the one-piece resistance element 5, 6, 10 are deposited by electroless plating, vacuum evaporation, or screen printing and firing of cermet materials on an insulating (e.g. ceramic) substrate. Area 5 is adjusted by cutting a notch 12 midway between terminals 1, 2, using a jet of abrasive particles, a laser beam &c. and area 10 is adjusted in a similar way at notch 15 while the resistance between two terminals or the overall attenuation is monitored. To make a "balanced T" or H attenuator (Fig. 4a) two terminals 18, 19, another conductive region 21 and an additional area of resistive element 28, 29 are used instead of the common terminal 3. A single substrate may carry decades of attenuators directly connected to switches, and the principle of dividing up a single resistive film element by one or more short-circuiting layers may be applied to other types of network.
GB972070A 1970-02-27 1970-02-27 Expired GB1302272A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB972070 1970-02-27

Publications (1)

Publication Number Publication Date
GB1302272A true GB1302272A (en) 1973-01-04

Family

ID=9877477

Family Applications (1)

Application Number Title Priority Date Filing Date
GB972070A Expired GB1302272A (en) 1970-02-27 1970-02-27

Country Status (3)

Country Link
US (1) US3680013A (en)
CA (1) CA921137A (en)
GB (1) GB1302272A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600816A (en) * 1982-09-03 1986-07-15 Larus Corporation Attenuator adapted for clip mounting to connecting block terminals
GB2332569A (en) * 1997-12-16 1999-06-23 Bosch Gmbh Robert Resistance component formed on a thin ceramic plate

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4349792A (en) * 1978-07-14 1982-09-14 Kings Electronics Co., Inc. Pi pad attenuator
US4505032A (en) * 1983-06-27 1985-03-19 Analogic Corporation Method of making a voltage divider
US4475099A (en) * 1983-06-27 1984-10-02 Analogic Corporation Voltage divider
US4617548A (en) * 1985-01-07 1986-10-14 Burroughs Corporation Current sensing resistance apparatus
GB9813668D0 (en) * 1998-06-25 1998-08-26 Sentec Ltd Printed circuit board current sensor
US6664500B2 (en) * 2000-12-16 2003-12-16 Anadigics, Inc. Laser-trimmable digital resistor
US6585904B2 (en) * 2001-02-15 2003-07-01 Peter Kukanskis Method for the manufacture of printed circuit boards with plated resistors
US6732422B1 (en) * 2002-01-04 2004-05-11 Taiwan Semiconductor Manufacturing Company Method of forming resistors
US7599629B2 (en) * 2003-06-06 2009-10-06 Scientific-Atlanta, Inc. Optical receiver having an open loop automatic gain control circuit
US8098127B2 (en) * 2007-06-07 2012-01-17 Its Electronics Inc. Resistor for microwave applications
US20090015355A1 (en) * 2007-07-12 2009-01-15 Endwave Corporation Compensated attenuator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2119195A (en) * 1935-11-05 1938-05-31 Mallory & Co Inc P R Constant impedance attenuator
US3227975A (en) * 1964-08-31 1966-01-04 Hewlett Packard Co Fixed coaxial line attenuator with dielectric-mounted resistive film
US3329921A (en) * 1964-10-16 1967-07-04 Collins Radio Co Adjustable center tap resistor
US3594679A (en) * 1968-04-18 1971-07-20 Corning Glass Works Method of making low noise film resistors and article
US3521201A (en) * 1968-11-01 1970-07-21 Hewlett Packard Co Coaxial attenuator having at least two regions of resistive material
JPS499570B1 (en) * 1968-11-04 1974-03-05
US3573703A (en) * 1969-05-09 1971-04-06 Darnall P Burks Resistor and method of adjusting resistance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600816A (en) * 1982-09-03 1986-07-15 Larus Corporation Attenuator adapted for clip mounting to connecting block terminals
GB2332569A (en) * 1997-12-16 1999-06-23 Bosch Gmbh Robert Resistance component formed on a thin ceramic plate

Also Published As

Publication number Publication date
US3680013A (en) 1972-07-25
CA921137A (en) 1973-02-13

Similar Documents

Publication Publication Date Title
GB1302272A (en)
GB1177285A (en) Thin-Film Impedance Arrangement
CA1116310A (en) Electric heating device comprising a resistance body of p.t.c. material
US4467310A (en) Telephone subscriber line battery feed resistor arrangements
GB1131536A (en) Solid state electric power controllers
GB1226789A (en)
GB1154017A (en) Electronic Circuit Components
GB1298475A (en) Improvements in or relating to electrical components
GB1087405A (en) Improvements in or relating to resistors
GB1033858A (en) Electrical resistor and method of manufacture
GB1163434A (en) Improvements in or relating to Ceramic Electrical Components
GB1203104A (en) Improvements in the trimming to value of thin film circuit components
GB1158481A (en) Spark Gap Electronic Component
US4503418A (en) Thick film resistor
GB1290355A (en)
US3602861A (en) Hybrid element variable resistor
GB1013849A (en) Improvements in or relating to insulating supports for electrical circuits
GB697070A (en) Improvements in electric components comprising resistances and capacitances
GB937502A (en) Combination resistor and capacitor with built-in lightning arrester
JPS5650553A (en) Semiconductor device
GB1303263A (en)
GB1363919A (en) Variableresistance control devices and resisitance elements for use in such devices
US3611060A (en) Three terminal active glass memory element
GB1207357A (en) Improvements in or relating to recording devices
GB753632A (en) Printed electrical circuit

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees