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US 2012/0235727 A1Published application
Signal shaping circuit
AssigneeFujitsu Limited
InventorsHideki OKU, Yukito Tsunoda
Life of this patent
Estimating the term…
Abstract
A signal shaping circuit that shapes a drive signal and includes a main-signal amplifying circuit that amplifies the drive signal; a preemphasis generating circuit that symmetrically emphasizes a rising portion and a falling portion of the drive signal; a current source that is provided in the main-signal amplifying circuit; and a condenser that couples the main-signal amplifying circuit and the preemphasis generating circuit.
Claims20
A signal shaping circuit that shapes a drive signal, comprising:
- a main-signal amplifying circuit that amplifies the drive signal;
- a preemphasis generating circuit that symmetrically emphasizes a rising portion and a falling portion of the drive signal;
- a current source that is provided in the main-signal amplifying circuit;
- and
- a condenser that couples the main-signal amplifying circuit and the preemphasis generating circuit.
2 more elements
A signal shaping circuit that shapes a drive signal, comprising:
- a main-signal amplifying circuit that amplifies the drive signal;
- a preemphasis generating circuit that symmetrically emphasizes a rising portion and a falling portion of the drive signal;
- a subtraction circuit that performs a subtraction of the input drive signal and a delay signal obtained by delaying the drive signal, and inputs a result of the subtraction to the preemphasis generating circuit;
- and
- an addition circuit that adds an output from the preemphasis generating circuit to an output from the main-signal amplifying circuit.
2 more elements
A signal shaping circuit that shapes a drive signal, comprising:
- a main-signal amplifying circuit that amplifies the drive signal;
- a preemphasis generating circuit that symmetrically emphasizes a rising portion and a falling portion of the drive signal;
- a current source that is provided in the main-signal amplifying circuit;
- a condenser that couples the main-signal amplifying circuit and the preemphasis generating circuit;
- a subtraction circuit that performs a subtraction of the input drive signal and a delay signal obtained by delaying the drive signal, and input a result of the subtraction to the preemphasis generating circuit;
- and
- an addition circuit that adds an output from the preemphasis generating circuit to an output from the main-signal amplifying circuit.
4 more elements
Dependencies are inferred from the claim text.