Classifications

• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03F—AMPLIFIERS
  • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
  • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
• • G—PHYSICS
  • G05—CONTROLLING; REGULATING
  • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
  • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
  • G05F1/10—Regulating voltage or current 
  • G05F1/46—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC
  • G05F1/613—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in parallel with the load as final control devices
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06G—ANALOGUE COMPUTERS
  • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
  • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor
  • G06G7/16—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor for multiplication or division
  • G06G7/163—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor for multiplication or division using a variable impedance controlled by one of the input signals, variable amplification or transfer function
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03C—MODULATION
  • H03C1/00—Amplitude modulation
  • H03C1/36—Amplitude modulation by means of semiconductor device having at least three electrodes
• • 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
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03G—CONTROL OF AMPLIFICATION
  • H03G5/00—Tone control or bandwidth control in amplifiers
  • H03G5/16—Automatic control
  • H03G5/24—Automatic control in frequency-selective amplifiers
  • H03G5/28—Automatic control in frequency-selective amplifiers having semiconductor devices
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B3/00—Line transmission systems
  • H04B3/02—Details
  • H04B3/04—Control of transmission; Equalising
  • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
  • H04B3/146—Control of transmission; Equalising characterised by the equalising network used using phase-frequency equalisers
  • H04B3/148—Control of transmission; Equalising characterised by the equalising network used using phase-frequency equalisers variable equalisers

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Mathematical Physics (AREA)
• Power Engineering (AREA)
• Theoretical Computer Science (AREA)
• Software Systems (AREA)
• Computer Hardware Design (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Electromagnetism (AREA)
• Radar, Positioning & Navigation (AREA)
• Automation & Control Theory (AREA)
• Networks Using Active Elements (AREA)
• Amplifiers (AREA)

Applications Claiming Priority (1)

Publications (2)

Family

ID=24668606

Family Applications (1)

Country Status (10)

Families Citing this family (15)

Family Cites Families (2)

• 1967
  • 1967-09-01 US US665074A patent/US3539826A/en not_active Expired - Lifetime
• 1968
  • 1968-08-01 GB GB36653/68A patent/GB1236994A/en not_active Expired
  • 1968-08-06 ES ES356988A patent/ES356988A1/es not_active Expired
  • 1968-08-14 BE BE719482D patent/BE719482A/xx unknown
  • 1968-08-19 JP JP5857768A patent/JPS5345665B1/ja active Pending
  • 1968-08-19 FR FR1577135D patent/FR1577135A/fr not_active Expired
  • 1968-08-28 NL NL6812207.A patent/NL159834B/xx not_active IP Right Cessation
  • 1968-08-29 DE DE1791025A patent/DE1791025C3/de not_active Expired
  • 1968-08-30 CH CH1308368A patent/CH474913A/de not_active IP Right Cessation
  • 1968-08-30 SE SE11703/68A patent/SE353425B/xx unknown

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