Device for reading digital information recorded on an informatio

Details Device for reading digital information recorded on an informatio Device for reading digital information recorded on an informatio

1990-04-25

1992-04-21

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 59, 360 39, G11B 509, G11B 1552, G11B 2010, G11B 2722

Patent

active

051074800

ABSTRACT:
A signal processor produces a digital signal (Vd), which may be derived from digital information recorded on an information carrier, and applies it to a peak detector for generating a control signal (Vr) which corresponds to the peak value of the digital signal. The digital signal is also applied to a digital amplifier whose gain is controllable by the control signal so that the resulting amplified digital signal (Vv) will drive a digital-to-analog converter to the maximum extent of its conversion range, thereby maximizing the analog output signal (Va) of the converter. The peak detector may be adapted to produce the control signal in accordance with a peak code (Vp) already recorded on the information carrier, which peak code is derived therefrom by the signal processor and indicates the peak digital value of the recorded digital information.

REFERENCES:
patent: 3379839 (1968-04-01), Bennett
patent: 3430215 (1969-07-01), Krossa et al.
patent: 4169219 (1979-09-01), Beard
patent: 4383279 (1983-05-01), Kenney, II
patent: 4397010 (1983-08-01), Nabeshima
patent: 4528664 (1985-06-01), Cheng et al.
patent: 4543650 (1985-09-01), Wachi
"Aiwa Offers High-End Functions in the Popular Price Range", Journal of the Electronics Industry, Feb. 1989, p. 43.

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