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
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F19/00—Fixed transformers or mutual inductances of the signal type
  • H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
  • H01F19/06—Broad-band transformers, e.g. suitable for handling frequencies well down into the audio range
• • 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
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03G—CONTROL OF AMPLIFICATION
  • H03G3/00—Gain control in amplifiers or frequency changers
  • H03G3/20—Automatic control
  • H03G3/30—Automatic control in amplifiers having semiconductor devices
  • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
  • H03H11/00—Networks using active elements
  • H03H11/02—Multiple-port networks
  • H03H11/24—Frequency-independent attenuators
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
  • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
  • H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Power Engineering (AREA)
• Networks Using Active Elements (AREA)
• Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
• Circuits Of Receivers In General (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=24348346

Family Applications (1)

Country Status (6)

Families Citing this family (4)

Family Cites Families (5)

• 1966
  • 1966-10-17 US US587100A patent/US3495193A/en not_active Expired - Lifetime
• 1967
  • 1967-10-16 DE DE1591420A patent/DE1591420C3/de not_active Expired
  • 1967-10-16 NL NL6714026A patent/NL6714026A/xx unknown
  • 1967-10-16 SE SE14117/67A patent/SE344146B/xx unknown
  • 1967-10-16 BE BE705168D patent/BE705168A/xx unknown
  • 1967-10-17 GB GB47194/67A patent/GB1195089A/en not_active Expired

Also Published As

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