Cathode Resistor Supplies Bias (e.g., Self-biasing Circuits) Patents (Class 330/142)
  • Input/output signals preserver circuit of amplification circuits
    Patent number: 7511573
    Abstract: The present invention relates to an input and output signal preservation circuit of an amplification circuit capable of preventing an attenuation of an input signal and an output signal of an amplification circuit in such a manner that an AC input signal is amplified using an amplification device such as a vacuum tube or a transistor in a preamplifier.
    Type: Grant
    Filed: September 24, 2004
    Date of Patent: March 31, 2009
    Inventors: Jong-Ryul Lee, Jong-Seok Lee