Noise cancelling system for low frequency analog recording

Details Noise cancelling system for low frequency analog recording Noise cancelling system for low frequency analog recording

1983-03-04

1984-07-17

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Modulating or demodulating

Frequency

360 27, G11B 504, G11B 543

Patent

active

044609299

ABSTRACT:
The present disclosure describes an electronic system for use with low cost audio tape recorders whereby a substantially noise-free wide dynamic range is provided for the recording of analog signals in the DC to 30HZ frequency band. In achieving this result, the system utilizes two FM carrier oscillators having center frequencies displaced from each other and modulated respectively in opposite senses by the signal being recorded. The system also provides an additional utility channel of limited dynamic range for the concurrent recording of time markers, digital signals and the like.

REFERENCES:
patent: 4148078 (1979-04-01), Riddle, Jr.

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