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US 6,476,679 B2Granted
Semiconductor circuit with a stabilized gain slope
AssigneeNEC Corporation
InventorsYuji Kakuta, Yoshiaki Fukasawa, Yuichi Taguchi
Life of this patent
Estimating the term…
Abstract
Realizing a stabilized gain slope without increasing circuit scale or entailing extra time or care for correcting impedance. A resonant circuit that is made up of a capacitor and an inductor is provided in an output stage outside a feedback loop for realizing peaking at a particular frequency and for realizing a gain slope having a desired slope of, for example, 1 dB or more.
Claims14
A semiconductor circuit comprising:
- a plurality of amplifier circuits connected in multiple stages;
- a feedback loop that feeds back from an output side to an input side of at least one amplifier circuit of said plurality of amplifier circuits;
- and,
- a resonant circuit outside said feedback loop,
- wherein said resonant circuit effects peaking at a particular frequency, realizes a gain slope having an inclination of 1 dB or more in said amplifier circuits, and realizes said gain slope across an entire employed frequency, increasing with higher frequencies within said entire employed frequency.
2 more elements
A semiconductor circuit comprising:
- a plurality of amplifier circuits connected in multiple stages;
- a feedback loop that feeds back from an output side to an input side of at least one amplifier circuit of said plurality of amplifier circuits;
- and,
- a resonant circuit outside said feedback loop,
- wherein a change in impedance of said resonant circuit does not change impedance on an input side of any amplifier circuit of said plurality of amplifier circuits to which a feedback loop feeds back from an output side, and
- wherein said resonant circuit is constituted by an inductor element provided with a capacitance component.
3 more elements
A semiconductor circuit comprising:
- a plurality of amplifier circuits connected in multiple stages;
- a feedback loop that feeds back from an output side to an input side of at least one amplifier circuit of said plurality of amplifier circuits;
- and,
- a resonant circuit outside said feedback loop,
- wherein a change in impedance of said resonant circuit does not change impedance on an input side of any amplifier circuit of said plurality of amplifier circuits to which a feedback loop feeds back from an output side,
- wherein said resonant circuit is provided in an output stage of said feedback loop, and
- wherein said resonant circuit is constituted by an inductor element provided with a capacitance component.
4 more elements
A semiconductor circuit comprising:
- a plurality of amplifier circuits connected in multiple stages;
- a feedback loop that feeds back from an output side to an input side of at least one amplifier circuit of said plurality of amplifier circuits;
- and,
- a resonant circuit outside said feedback loop,
- wherein a change in impedance of said resonant circuit does not change impedance on an input side of any amplifier circuit of said plurality of amplifier circuits to which a feedback loop feeds back from an output side,
- wherein said resonant circuit is provided in an output stage of said feedback loop,
- wherein said resonant circuit is provided in an output stage of said semiconductor circuit, and
- wherein said resonant circuit is constituted by an inductor element provided with a capacitor component.
5 more elements
Dependencies are inferred from the claim text.