Integrated circuit for a flexible disk drive capable of always recognizing a correct function
US5952800A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1999 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Feb 4, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/041
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an integrated circuit for use in controlling a flexible disk drive for driving a flexible disk loaded therein, a power on reset circuit produces a reset signal after a predetermined time duration elapses where a power supply voltage is stable from a time when a power supply is applied. The power on reset circuit comprises a voltage detecting circuit for detecting a power supply voltage to produce a voltage detected signal and a delay circuit for producing, responsive to the voltage detected signal, the reset signal after the predetermined time duration elapses. Disposed between a selectable function circuit and a logic circuit, an output holding circuit holds output signals of the selectable function circuit as held signals and supplies the held signals to the logic circuit. The output holding circuit consists of two D-type flip-flops which are disposed in correspondence with two output signal lines of a logical circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.