Recording channel with signal controlled integrated analog circu

Details Recording channel with signal controlled integrated analog circu Recording channel with signal controlled integrated analog circu

1983-05-16

1985-08-13

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 46, G11B 502, G11B 509

Patent

active

045353719

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.

REFERENCES:
patent: 3465321 (1969-09-01), Reisfeld
patent: 4279005 (1981-07-01), Kitamura et al.
patent: 4371901 (1983-02-01), Shah

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