Data recording apparatus

Details Data recording apparatus Data recording apparatus

1990-09-07

1992-10-27

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

360 32, G11B 509

Patent

active

051595028

ABSTRACT:
A data recording apparatus includes a digital input processing circuit, an analog input processing circuit including an A/D converter for recording the analog input signal in digital form, a switch for selecting either digital or analog input signals for recording, and a control circuit. Normally, the apparatus records the digital input signal. When the digital input processing circuit detects a synchronizing error or inhibition of recording the digital input signal (digital copy) by analyzing the sub-code signal of the digital input signal, the control circuit controls the selecting switch so as to select the analog input signal. In order to reduce unnatural level variation due to change of selection between the digital and analog input signals, there are further provided a polarity change circuit, variable delay, and variable gain amplifier for the analog audio signal.

REFERENCES:
patent: 4839733 (1989-06-01), Karamon et al.
patent: 5057947 (1991-10-01), Shimada

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