×

UHF Hybrid tuner

  • US 3,909,726 A
  • Filed: 09/26/1973
  • Issued: 09/30/1975
  • Est. Priority Date: 09/26/1973
  • Status: Expired due to Term
First Claim
Patent Images

1. A UHF tuner comprising a box-like housing having walls of electrically conductive material and including a radio-frequency amplifier tunable to receive selected signals in the UHF spectrum, a local oscillator tunable to develop a mixing signal displaced in frequency from that of the selected signal by a constant amount and a mixer responsive to said amplified selected signal and said mixing signal for producing a constant-frequency intermediate signal, said amplifier, said oscillator and said mixer being composed of inductive, capacitive, resistive, connective and active elements, the improvement in said inductive, capacitive, resistive and connective elements comprising:

  • a substrate, of non-magnetic electrically insulating material, supported within said housing;

    a first layer of electrically conductive material disposed on said substrate in a disconnected pattern defining a plurality of said connective elements;

    a second layer of at least one dielectric material overlying said first layer in a disconnected pattern;

    a third layer of electrically conductive material overlying said second layer in a disconnected pattern defining with said first and second layers said capacitive elements, forming at least a portion of said inductive elements, and defining another plurality of said connective elements;

    a fourth layer of at least one resistive material disposed in a disconnected pattern interconnecting different portions of said first and third layers to complete the definition of said resistive and connective elements; and

    means mounting said active elements on said substrate in interconnective relationship with said first and third layers.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×