Recording channel with signal controlled integrated analog circuits
US4535371A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1983 |
| Grant date | Aug 13, 1985 |
| Priority date | — |
| Expiry date | May 16, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording channel for a disk file including analog circuits implemented in integrated circuits whose frequency dependent parameters are controllable in response to the value of a control signal supplied to the circuit, as determined by a digital signal. In the preferred embodiment, the control signal to each analog circuit is from a digital to analog converter that is supplied with a digital signal from a register that is addressable and settable from a programmed microcontroller. Certain registers are able to be incremented or decremented by separate clock pulses and function as counters that are controlled by a signal in a feedback path separate from the microcontroller. Components external to the integrated circuits are, therefore, avoided while still maintaining the ability to adjust the analog read circuits to be responsive to data rates of different frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.