Input/output multiplex system for a read/write channel in a disk drive
AssigneeInfineon Technologies AG
InventorSasan Cyrusian
Life of this patent
Estimating the term…
Abstract
This invention provides a read/write channel with a multiplex input/output system for a disk drive, which may have one or more magnetic disks, one or more read/write heads, and a read/write channel. The read/write channel may comprise a multiplex input/output (I/O) terminal, a write output driver, and a digital to analog converter. The read/write channel may be implemented on an integrated circuit. The multiplex input/output system may send different signals or voltages through the same input/output terminal at essentially at the same time or different periods of time.
Claims19
A disk drive having a read/write channel implemented on an integrated circuit, comprising:
- a multiplex input/output (I/O) terminal coupled to at least one read/write head,
- a write output driver coupled to provide a write output signal to the multiplex I/O terminal, and
- a digital to analog converter coupled to provide an analog output voltage to the multiplex I/O terminal.
A read/write channel for a disk drive, where the read/write channel is implemented on an integrated circuit, the read/write channel comprising:
- a multiplex input/output (I/O) terminal;
- a write output driver coupled to provide a write output signal to the multiplex I/O terminal;
- a digital to analog converter coupled to provide an analog output voltage to the multiplex I/O terminal;
- an analog to digital converter (ADC) coupled to receive a diagnostic input voltage through the multiplex I/O terminal, the ADC to provide a diagnostic output signal in response to the diagnostic input voltage;
- and
- a test enable switch coupled to the multiplex I/O terminal, the test enable switch to provide an output DC test signal to the multiplex I/O terminal, the test enable switch to receive an input DC test signal through the multiplex I/O terminal.
A read/write channel for a disk drive, where the read/write channel has partial response maximum likelihood (PRML) encoding and decoding, and where the read/write channel is implemented on a complementary metal oxide semiconductor, the read/write channel comprising:
- a first multiplex input/output (I/O) terminal;
- a write output driver coupled to provide a write output signal to the first multiplex I/O terminal;
- a digital to analog converter coupled to provide an analog output voltage to the first multiplex I/O terminal;
- an analog to digital converter (ADC) coupled to receive a diagnostic input voltage through the first multiplex I/O terminal, the ADC to provide a diagnostic output signal in response to the diagnostic input voltage;
- and
- a test enable switch coupled to the first multiplex I/O terminal, the test enable switch to provide an output DC test signal to the first multiplex I/O terminal, the test enable switch to receive an input DC test signal through the first multiplex I/O terminal;
- a second multiplex input/output (I/O) terminal;
- and
- a variable gain amplifier (VGA) coupled to receive a magnetically generated signal and an analog service signal through the second multiplex I/O converter,
- where the write output signal, the analog output voltage, the diagnostic input voltage, and DC test signals are transmitted through the first multiplex I/O terminal at different times.
Dependencies are inferred from the claim text.