3423690

Information

• Patent Grant
• 3423690

• References
• Source

• Patent Number

  3,423,690

• Date Filed

  Not available

• Date Issued

  Tuesday, January 21, 1969
  56 years ago

• CPC

  • H04B3/08 - in negative-feedback path of line amplifier
  • H03F1/347 - using transformers
  • H03F1/36 - in discharge-tube amplifiers

• US Classifications

  • 330 - Amplifiers