Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01K—ELECTRIC INCANDESCENT LAMPS
  • H01K7/00—Lamps for purposes other than general lighting
  • H01K7/02—Lamps for purposes other than general lighting for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
  • H03H11/00—Networks using active elements
  • H03H11/02—Multiple-port networks
  • H03H11/04—Frequency selective two-port networks
  • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
• • 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
  • H03H7/002—Gyrators
• • 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
  • H03H7/01—Frequency selective two-port networks
  • H03H7/0153—Electrical filters; Controlling thereof
  • H03H7/0161—Bandpass filters
  • H03H7/0169—Intermediate frequency filters
  • H03H7/0184—Intermediate frequency filters with ferromagnetic core

Applications Claiming Priority (1)

Publications (1)

Family

ID=19791923

Family Applications (1)

Country Status (5)

Families Citing this family (17)

Family Cites Families (5)

• 0
  • NL NL68724D patent/NL68724C/xx active
  • FR FR965369D patent/FR965369A/fr not_active Expired
  • BE BE482214D patent/BE482214A/xx unknown
• 1948
  • 1948-03-06 US US13506A patent/US2647239A/en not_active Expired - Lifetime
  • 1948-04-26 GB GB11455/48A patent/GB645905A/en not_active Expired

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