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    Preamplifier circuit configuration
    1.
    发明授权
    Preamplifier circuit configuration 有权

    公开(公告)号：US10998866B2

    公开(公告)日：2021-05-04

    申请号：US16504202

    申请日：2019-07-05

    申请人： Kay Consulting, Inc.

    发明人： Jack Kay

    IPC分类号： H03F3/181 ,  H03G3/16 ,  H03G9/22 ,  H03G7/02

    摘要： An audio preamplifier includes a first stage including a first triode of a first vacuum tube in a common cathode configuration configured to perform a first gain function favoring one of low frequencies and mid-range frequencies in response to user input; a second stage including a second triode of the first vacuum tube in a common cathode configuration configured to perform a second gain function favoring one of low frequencies and mid-range frequencies in response to user input; a third stage including a first triode of a second vacuum tube in a common cathode configuration configured to perform a tone-shaping function favoring one of low frequencies and mid-range frequencies in response to user input; and a fourth stage including a second triode of the second vacuum tube in a follower configuration configured to perform a tone stack function in response to user input.