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US 9,941,869 B2Granted
Emphasis signal generation circuit and emphasis signal generation method
AssigneeFujitsu Limited
InventorYukito Tsunoda
Life of this patent
Estimating the term…
Abstract
A phase compensation circuit includes: a first circuit that increases phase characteristic of a specific frequency of an electrical signal; a second circuit that decreases the phase characteristic of the specific frequency of the electrical signal; and a limiting amplifier that amplifies an electrical signal that is processed by at least one of the first circuit and the second circuit.
Claims6
An emphasis signal generation circuit comprising:
- a plurality of individual paths, at least one of which is a delay path;
- and
- a phase compensation circuit provided in at least one of the individual paths, the phase compensation circuit comprising a first circuit, a second circuit and a limiting amplifier,
- a delay amount of the first circuit being larger on a higher frequency side than on a lower frequency side so that the first circuit increases phase characteristic of a specific frequency of an electrical signal,
- the second circuit being coupled with the first circuit in series
- a delay amount of the second circuit beinq smaller on a higher frequency side than on a lower frequency side so that the second circuit decreases the phase characteristic of the specific frequency of the electrical signal,
- the limiting amplifier being provided after the first circuit and the second circuit and being configured to amplify an electrical signal that is processed by at least one of the first circuit and the second circuit.
4 more elements
An emphasis signal generation method by using a phase compensation circuit comprising:
- achieving a desirable phase by adjusting phase characteristic of at least one of a first circuit and a second circuit,
- wherein the phase compensation circuit comprises:
- a plurality of individual paths, at least one of which is a delay path;
- and
- a phase compensation circuit provided in at least one of the individual paths, the phase compensation circuit comprising a first circuit, a second circuit and a limiting amplifier,
- a delay amount of the first circuit being larger on a higher frequency side than on a lower frequency side so that the first circuit increases phase characteristic of a specific frequency of an electrical signal,
- the second circuit being coupled with the first circuit in series
- a delay amount of the second circuit being smaller on a higher frequency side than on a lower frequency side so that the second circuit decreases the phase characteristic of the specific frequency of the electrical signal,
- the limiting amplifier being provided after the first circuit and the second circuit and being configured to amplify an electrical signal that is processed by at least one of the first circuit and the second circuit.
6 more elements
Dependencies are inferred from the claim text.