GB1467387A - Tunable inductance or lc circuit - Google Patents

Tunable inductance or lc circuit

Info

Publication number
GB1467387A
GB1467387A GB3158274A GB3158274A GB1467387A GB 1467387 A GB1467387 A GB 1467387A GB 3158274 A GB3158274 A GB 3158274A GB 3158274 A GB3158274 A GB 3158274A GB 1467387 A GB1467387 A GB 1467387A
Authority
GB
United Kingdom
Prior art keywords
inductance
inductor
printed
capacitor
abrasion
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
GB3158274A
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Publication of GB1467387A publication Critical patent/GB1467387A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H5/00—One-port networks comprising only passive electrical elements as network components
    • H03H5/02—One-port networks comprising only passive electrical elements as network components without voltage- or current-dependent elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N97/00—Electric solid-state thin-film or thick-film devices, not otherwise provided for
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • H05K1/162—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed capacitors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Filters And Equalizers (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

1467387 Printed circuit assembly RCA CORPORATION 17 July 1974 [20 July 1973] 31582/74 Heading H1R A printed inductor is so designed that its inductance can be increased by removal of material. Typically it is a trimming inductor in a resonant LC circuit (Fig. 1) in series with a larger fixed inductor 14. The conductors 16, 18 and the capacitor electrodes 8, 12 may be of glass frit loaded with particles of silver, palladium and palladium oxide screen printed on alumina substrate 4 and fired, the capacitor dielectric 10 being of glass. The amount of trimming of the capacitor required to take the resonant frequency from an original value below the desired frequency to a value slightly above it is calculated and the top electrode notched by abrasion or laser machining to achieve this. Then, preferably after partial encapsulation, slots are formed in strips 20, 22, 24 in turn by abrasion, while the resonant frequency is monitored, to form a serpentine current path of increased inductance to complete the inductance. Fixed inductance 15 may be dispensed with when a lower inductance is required.
GB3158274A 1973-07-20 1974-07-17 Tunable inductance or lc circuit Expired GB1467387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US38117873A 1973-07-20 1973-07-20

Publications (1)

Publication Number Publication Date
GB1467387A true GB1467387A (en) 1977-03-16

Family

ID=23504012

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3158274A Expired GB1467387A (en) 1973-07-20 1974-07-17 Tunable inductance or lc circuit

Country Status (5)

Country Link
JP (1) JPS5042369A (en)
CA (1) CA1028436A (en)
DE (1) DE2433376A1 (en)
FR (1) FR2238289B1 (en)
GB (1) GB1467387A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4008507A1 (en) * 1989-03-23 1990-09-27 Murata Manufacturing Co LAMINATED LC FILTER
DE4011294A1 (en) * 1989-04-12 1990-10-25 Murata Manufacturing Co Laminated noise and interference LC filter - has specified ratio of power inductances in regions forming capacitances
EP0500103A1 (en) * 1991-02-21 1992-08-26 Takeshi Ikeda Laminate Type LC Element
GB2260223A (en) * 1991-09-24 1993-04-07 Mitsubishi Electric Corp Hybrid microwave integrated circuit
CN109141689A (en) * 2018-07-17 2019-01-04 东莞成启瓷创新材料有限公司 A kind of low-temperature co-fired ceramics LTCC pressure sensor

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035695A (en) * 1974-08-05 1977-07-12 Motorola, Inc. Microelectronic variable inductor
JPS6297416A (en) * 1985-10-23 1987-05-06 Fujitsu Ltd Constituting method for chip type delay element
JP2725439B2 (en) * 1990-05-17 1998-03-11 株式会社 村田製作所 Frequency adjustment method for electronic components
US6189201B1 (en) * 1999-03-19 2001-02-20 Sino Dragon Inc. Method of tuning a high frequency printed resonance circuit
US6980414B1 (en) 2004-06-16 2005-12-27 Marvell International, Ltd. Capacitor structure in a semiconductor device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4008507A1 (en) * 1989-03-23 1990-09-27 Murata Manufacturing Co LAMINATED LC FILTER
DE4011294A1 (en) * 1989-04-12 1990-10-25 Murata Manufacturing Co Laminated noise and interference LC filter - has specified ratio of power inductances in regions forming capacitances
DE4011294C2 (en) * 1989-04-12 1998-08-20 Murata Manufacturing Co Laminated LC filter and process for its manufacture
EP0500103A1 (en) * 1991-02-21 1992-08-26 Takeshi Ikeda Laminate Type LC Element
US5250915A (en) * 1991-02-21 1993-10-05 Takeshi Ikeda Laminate type LC filter
GB2260223A (en) * 1991-09-24 1993-04-07 Mitsubishi Electric Corp Hybrid microwave integrated circuit
US5233310A (en) * 1991-09-24 1993-08-03 Mitsubishi Denki Kabushiki Kaisha Microwave integrated circuit
GB2260223B (en) * 1991-09-24 1995-05-24 Mitsubishi Electric Corp Microwave integrated circuit
CN109141689A (en) * 2018-07-17 2019-01-04 东莞成启瓷创新材料有限公司 A kind of low-temperature co-fired ceramics LTCC pressure sensor

Also Published As

Publication number Publication date
CA1028436A (en) 1978-03-21
JPS5042369A (en) 1975-04-17
FR2238289B1 (en) 1979-08-03
DE2433376A1 (en) 1975-03-27
FR2238289A1 (en) 1975-02-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee