GB1516158A - Inductive reactance circuit - Google Patents

Inductive reactance circuit

Info

Publication number
GB1516158A
GB1516158A GB46950/75A GB4695075A GB1516158A GB 1516158 A GB1516158 A GB 1516158A GB 46950/75 A GB46950/75 A GB 46950/75A GB 4695075 A GB4695075 A GB 4695075A GB 1516158 A GB1516158 A GB 1516158A
Authority
GB
United Kingdom
Prior art keywords
input
amplifier
winding
inductive reactance
reactance circuit
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
GB46950/75A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB1516158A publication Critical patent/GB1516158A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/46—One-port networks
    • H03H11/48—One-port networks simulating reactances
    • H03H11/485—Simulating inductances using operational amplifiers

Landscapes

  • Networks Using Active Elements (AREA)
  • Amplifiers (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

1516158 Active impedance TELEFONAKTIEBOLAGET LM ERICSSON 13 Nov 1975 [15 Nov 1974] 46950/75 Heading H3U An inductive reactance circuit comprises a mutual inductance having a first and a second inductive windings L2, L1, a two input amplifier OP whose first input is connected to a tap on the first winding and whose second input is connected to an end of the second winding, possibly by a resistive divider R A R B , which end is also an input of the circuit. Another input is provided by an end of the first winding. The amplifier has a high input impedance and preferably is an operational amplifier. The two windings L1, L2 may be on a common ferrite core. By varying the tap position on L2, or the position in R A , R B connected to the amplifier, the equivalent inductance may be varied.
GB46950/75A 1974-11-15 1975-11-13 Inductive reactance circuit Expired GB1516158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7414376A SE378954B (en) 1974-11-15 1974-11-15

Publications (1)

Publication Number Publication Date
GB1516158A true GB1516158A (en) 1978-06-28

Family

ID=20322708

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46950/75A Expired GB1516158A (en) 1974-11-15 1975-11-13 Inductive reactance circuit

Country Status (4)

Country Link
DE (1) DE2548001C3 (en)
DK (1) DK514175A (en)
GB (1) GB1516158A (en)
SE (1) SE378954B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323649C2 (en) * 1983-07-01 1987-04-02 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for increasing the inductance of a coil
DE3323651A1 (en) * 1983-07-01 1985-01-17 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for increasing the shunt inductance of a transformer

Also Published As

Publication number Publication date
SE378954B (en) 1975-09-15
DE2548001A1 (en) 1976-05-20
DK514175A (en) 1976-05-16
DE2548001C3 (en) 1978-07-13
DE2548001B2 (en) 1977-11-03

Similar Documents

Publication Publication Date Title
GB1039500A (en) Electromagnetic device
GB1006095A (en) Keying devices, particularly for electrical musical instruments
GB964603A (en) Improvements in or relating to transformers
GB948241A (en) A circuit arrangement including a telephone instrument
GB958175A (en) Improvements in or relating to negative impedance circuits
GB1516158A (en) Inductive reactance circuit
GB921950A (en) Broad band loop antenna
ES442355A1 (en) HF signal transmission device
JPS5726912A (en) Lump constant type circulator and isolator
GB981517A (en) An improved balanced phase shift transformer
GB1493540A (en) Arrangements for increasing the impedance of transformer windings
GB980527A (en) Transformer with a carefully adjusted primary inductance
GB961399A (en) Data transmission apparatus
GB1072974A (en) Improvements in or relating to electric circuit arrangements including inductive elements
GB1033962A (en) High frequency pulse transformer/distributor
GB1236687A (en) Double-tuned intermediate-frequency transformer
GB1136119A (en) Anti-side tone circuit
GB773850A (en) Improvements in or relating to telephone set circuits
GB618398A (en) Improvements in or relating to variable impedance reactors
GB748883A (en) Improvements in electric transformers
GB606599A (en) Improvements in and relating to permeability tuned loop antenna circuits
GB637938A (en) Improvements in or relating to systems comprising electromagnetic vibratory inverters
GB1044526A (en) Improvements in or relating to cores for transformers and chokes
GB887279A (en) Improvements in or relating to integrating circuit arrangements including inductances having ferromagnetic cores
GB1048185A (en) Improvements in or relating to electrical components including inductively coupled windings

Legal Events

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