Distributed constant circuit in an amplifier
AssigneeSanyo Electric Co., Ltd.
InventorsHisanori Uda, Masao Nishida
Life of this patent
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Abstract
In a distributed constant circuit, a first line is connected between a first node and a second node. The first node is grounded through a series connection between a first capacitor and a second line, and the second node is grounded through a series connection between a second capacitor and a third line. The parameters of the first, second and third lines and the first and second capacitors satisfy a predetermined relational expression such that characteristics equivalent to a λ/4 line are obtained with respect to the frequency of a fundamental wave, and the second and third lines and the first and second capacitors respectively resonate with respect to an arbitrary frequency.
Claims8
In an amplifier comprising at least one field-effect transistor (FET), a distributed constant circuit comprising:
- a line;
- and
- a first capacitor,
- one end of said line being directly connected to a predetermined reference potential in an AC manner, and the other end of said line being connected to said reference potential through said first capacitor,
- said line and said first capacitor constituting an inductor with respect to a predetermined frequency, wherein said distributed constant circuit is connected to an input of said FET via a second capacitor.
In an amplifier comprising at least one field-effect transistor (FET), a distributed constant circuit comprising:
- a line;
- a first capacitor;
- and
- an inductor component connected in series with said first capacitor,
- one end of said line being directly connected to a predetermined reference potential in an AC manner, and the other end of said line being connected to said reference potential through said series connected first capacitor and inductor component,
- said line, said first capacitor and said inductor component constituting an inductor with respect to a first predetermined frequency, wherein said distributed constant circuit is connected to an input of said FET via a second capacitor.
In an amplifier comprising at least one field-effect transistor (FET), a distributed constant circuit comprising:
- a first line;
- a first capacitor;
- and
- a second line connected in series with said first capacitor,
- one end of said first line being directly connected to a predetermined reference potential in an AC manner, and the other end of said first line being connected to said reference potential through said series connected first capacitor and second line,
- said first line, said first capacitor and said second line constituting an inductor with respect to a first predetermined frequency, wherein said distributed constant circuit is connected to an input of said FET via a second capacitor.
Dependencies are inferred from the claim text.