Sound recording apparatus

Details Sound recording apparatus Sound recording apparatus

1993-09-23

1994-06-21

Chin, Tommy P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

358341, 381 98, 381101, 333 28R, 333214, 360 68, 348738, G11B 5035

Patent

active

053232771

ABSTRACT:
A sound recording apparatus for use in video tape recorders, for equalizing a sound signal before the sound signal is recorded onto a recording medium includes an operational amplifier where the sound signal is inputted to its first input terminal, a feedback resistor connected to an output terminal and a second input terminal of the operational amplifier, and a simulated inductor circuit connected to the second input terminal of the operational amplifier. The simulated inductor circuit has a buffer where a predetermined bias is provided to its input. Between an output of the buffer and the second input terminal of the operational amplifier is connected an impedance network whose circuit constant is switched by a switch which operates according to a recording speed mode of the video tape recorder. This switching changes an equalizing characteristic of the amplifier.

REFERENCES:
patent: 4046960 (1977-09-01), Veale
patent: 4500932 (1985-02-01), Sato et al.
patent: 4521750 (1985-06-01), Fukushima et al.
patent: 4890170 (1989-12-01), Inohana et al.
patent: 5223990 (1993-06-01), Yoshida et al.

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