US 2011/0211431 A1 · SEMICONDUCTOR INTEGRATED CIRCUIT AND DISK RECORDING AND REPRODUCING DRIVE USING THE SAME

Abstract

The present invention enables a comprehensive evaluation from both of data read from a disk and a servo signal of a servo controller. The present invention provides a semiconductor integrated circuit mountable to a disk recording and reproducing drive, which comprises a signal processor of an RF signal read from a pickup, a servo controller responsive to a servo error signal read from the pickup, a memory controller, and an external interface. The memory controller is supplied with read data and a servo signal and stores the read data and the servo signal in a buffer memory according to a time division process. The read data and the servo signal stored in the buffer memory can be transferred to an external device via the external interface by the memory controller.

Claims47

Dependent claims

A semiconductor integrated circuit mountable to a disk recording and reproducing drive comprising:

a spindle motor capable of rotatably driving a disk;
a pickup capable of executing a writing of data onto the disk and a reading of data from the disk;
a pickup drive motor capable of driving the pickup;
and
a buffer memory capable of storing therein the data read from the disk and the data written onto the disk,
the semiconductor integrated circuit comprising:
a signal processor capable of generating the read data according to a process of an RF signal read from the pickup by the data reading;
and
a servo controller capable of controlling the spindle motor, the pickup and the pickup drive motor in response to a servo error signal read from the pickup,
the semiconductor integrated circuit further comprising:
a memory controller supplied with the read data generated from the signal processor and a servo signal generated from the servo controller and coupleable to the buffer memory;
and
an external interface coupleable to an external device of the semiconductor integrated circuit and coupled to the memory controller,
wherein the memory controller is capable of storing the read data and the servo signal in the buffer memory according to a time division process and transferring the read data and the servo signal stored in the buffer memory according to the time division process to the external device through the external interface.

11 more elements

A disk recording and reproducing drive comprising:

a spindle motor capable of rotatably driving a disk;
a pickup capable of executing a writing of data onto the disk and a reading of data from the disk;
a pickup drive motor capable of driving the pickup;
a buffer memory capable of storing therein the data read from the disk and the data written onto the disk;
and
a semiconductor integrated circuit,
wherein the semiconductor integrated circuit comprises:
a signal processor capable of generating the read data according to a process of an RF signal read from the pickup by the data reading;
and
a servo controller capable of controlling the spindle motor, the pickup and the pickup drive motor in response to a servo error signal read from the pickup,
wherein the semiconductor integrated circuit further comprises:
a memory controller supplied with the read data generated from the signal processor and a servo signal generated from the servo controller and coupleable to the buffer memory;
and
an external interface coupleable to an external device of the semiconductor integrated circuit and coupled to the memory controller, and
wherein the memory controller is capable of storing the read data and the servo signal in the buffer memory according to a time division process and transferring the read data and the servo signal stored in the buffer memory according to the time division process to the external device through the external interface.

12 more elements

An optical disk drive comprising:

pickup means for outputting an electric signal, based on reflected light from laser light applied onto an information recording medium;
analog signal processing means for outputting a servo error signal and an RF signal, based on the electric signal outputted from the pickup means;
read means for generating a reproduction signal, based on the RF signal outputted from the analog signal processing means;
servo control means for calculating a servo control signal using the servo error signal outputted from the analog signal processing means, controlling the pickup means using the servo control signal and outputting any of a servo error calculation signal, a servo calculation control signal and a servo operation status signal or a signal of a combination thereof;
buffer memory means for recording any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, and the reproduction signal;
buffer control means for controlling a recording process and a reading process of the buffer memory means;
system control means for controlling the read means, the servo control means and the buffer control means;
and
external interface means for performing a transfer of any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal and control data to and from the buffer control means and the system control means and thereby communicating with the outside of the optical disk drive,
wherein any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof and the reproduction signal all recorded in the buffer memory means are outputted to the outside of the optical disk drive.

7 more elements

An optical disk drive comprising:

pickup means for outputting an electric signal, based on reflected light from laser light applied onto an information recording medium;
analog signal processing means for outputting a servo error signal and an RF signal, based on the electric signal outputted from the pickup means;
read means for generating a reproduction signal, based on the RF signal outputted from the analog signal processing means;
servo control means for calculating a servo control signal using the servo error signal outputted from the analog signal processing means, controlling the pickup means using the servo control signal and outputting any of a servo error calculation signal, a servo calculation control signal and a servo operation status signal or a signal of a combination thereof;
buffer memory means for recording any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, and the reproduction signal;
buffer control means for performing a trigger determining process on any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof and controlling a recording process and a reading process of the buffer memory means, based on the determination of trigger generation;
system control means for controlling the read means, the servo control means and the buffer control means;
and
external interface means for performing a transfer of any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal and control data to and from the buffer control means and the system control means and thereby communicating with the outside of the optical disk drive,
wherein any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof and the reproduction signal all recorded in the buffer memory means are outputted to the outside of the optical disk drive.

7 more elements

An optical disk recording or reproducing method comprising:

a pickup step of outputting an electric signal, based on reflected light from laser light applied onto an information recording medium;
an analog signal processing step of outputting a servo error signal and an RF signal, based on the electric signal outputted from the pickup step;
a read step of generating a reproduction signal, based on the RF signal outputted from the analog signal processing step;
a servo control step of calculating a servo control signal using the servo error signal outputted from the analog signal processing step, controlling the pickup step using the servo control signal and outputting any of a servo error calculation signal, a servo calculation control signal and a servo operation status signal or a signal of a combination thereof;
a buffer memory step of recording any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, and the reproduction signal;
a buffer control step of performing a trigger determining process on any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof and controlling a recording process and a reading process of the buffer memory step, based on the determination of trigger generation;
a system control step of controlling the read step, the servo control step and the buffer control step;
and
an external interface step of performing a transfer of any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal and control data to and from the buffer control step and the system control step and thereby communicating with the outside of an optical disk drive,
wherein any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof and the reproduction signal all recorded in the buffer memory step are outputted to the outside of the optical disk drive.

7 more elements

An optical disk recording or reproducing method comprising:

a pickup step of outputting an electric signal, based on reflected light from laser light applied onto an information recording medium;
an analog signal processing step of outputting a servo error signal and an RF signal, based on the electric signal outputted from the pickup step;
a read step of generating a reproduction signal, based on the RF signal outputted from the analog signal processing step;
a servo control step of calculating a servo control signal using the servo error signal outputted from the analog signal processing step, controlling the pickup step using the servo control signal and outputting any of a servo error calculation signal, a servo calculation control signal and a servo operation status signal or a signal of a combination thereof;
a buffer memory step of recording any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal and the RF signal;
a buffer control step of controlling a recording process and a reading process of the buffer memory step;
a system control step of controlling the read step, the servo control step and the buffer control step;
and
an external interface step of performing a transfer of any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal, the RF signal and control data to and from the buffer control step and the system control step and thereby communicating with the outside of an optical disk drive,
wherein any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal and the RF signal all recorded in the buffer memory step are outputted to the outside of the optical disk drive.

7 more elements

An optical disk drive comprising:

pickup means for outputting an electric signal, based on reflected light from laser light applied onto an information recording medium;
analog signal processing means for outputting a servo error signal and an RF signal, based on the electric signal outputted from the pickup means;
read means for generating a reproduction signal, based on the RF signal outputted from the analog signal processing means;
servo control means for calculating a servo control signal using the servo error signal outputted from the analog signal processing means, controlling the pickup means using the servo control signal and outputting any of a servo error calculation signal, a servo calculation control signal and a servo operation status signal or a signal of a combination thereof;
buffer memory means for recording any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal and the RF signal;
buffer control means for performing a trigger determining process on any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof and controlling a recording process and a reading process of the buffer memory means, based on the determination of trigger generation;
system control means for controlling the read means, the servo control means and the buffer control means;
and
external interface means for performing a transfer of any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal, the RF signal and control data to and from the buffer control means and the system control means and thereby communicating with the outside of the optical disk drive,
wherein any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal and the RF signal all recorded in the buffer memory means are outputted to the outside of the optical disk drive.

7 more elements

An optical disk recording or reproducing method comprising:

a pickup step of outputting an electric signal, based on reflected light from laser light applied onto an information recording medium;
an analog signal processing step of outputting a servo error signal and an RF signal, based on the electric signal outputted from the pickup step;
a read step of generating a reproduction signal, based on the RF signal outputted from the analog signal processing step;
a servo control step of calculating a servo control signal using the servo error signal outputted from the analog signal processing step, controlling the pickup step using the servo control signal and outputting any of a servo error calculation signal, a servo calculation control signal and a servo operation status signal or a signal of a combination thereof;
a buffer memory step of recording any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal and the RF signal;
a buffer control step of performing a trigger determining process on any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof and controlling a recording process and a reading process of the buffer memory step, based on the determination of trigger generation;
a system control step of controlling the read step, the servo control step and the buffer control step;
and
an external interface step of performing a transfer of any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal, the RF signal and control data to and from the buffer control step and the system control step and thereby communicating with the outside of an optical disk drive,
wherein any of the servo error calculation signal, the servo calculation control signal and the servo operation status signal or the signal of the combination thereof, the reproduction signal and the RF signal all recorded in the buffer memory step are outputted to the outside of the optical disk drive.

7 more elements

Dependencies are inferred from the claim text.

Semiconductor integrated circuit and disk recording and reproducing drive using the same

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Semiconductor integrated circuit and disk recording and reproducing drive using the same

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Abstract

Claims47