Amplifiers – With semiconductor amplifying device – Including particular biasing arrangement
Patent
1986-08-13
1988-07-05
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including particular biasing arrangement
330288, H03F 304
Patent
active
047557702
ABSTRACT:
A current cancellation circuit having, and method for producing, a low noise spectral density current for cancelling the DC input bias current of an input signal to an amplifier. The cancellation circuit provides for generating a DC cancelling current having a magnitude K times greater than the magnitude of the input DC bias current and then reducing the same by K times. The resulting cancelling current has a reduced noise current spectral density associated with it, thereby reducing the overall noise current spectral density of the input stage.
REFERENCES:
patent: 4263562 (1981-04-01), Seiler
patent: 4575685 (1986-03-01), Dobkin et al.
patent: 4639684 (1987-01-01), Laude
Furino, Jr. James P.
Groom Terry J.
Harris Corporation
Mullins James B.
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