Active filter characteristic changeover circuit for use in a VCR

Details Active filter characteristic changeover circuit for use in a VCR Active filter characteristic changeover circuit for use in a VCR

1994-07-11

1995-05-23

Psitos, A.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 61, G11B 5035, G11B 1512

Patent

active

054186617

ABSTRACT:
An active filter characteristic changeover circuit, for use in a video cassette recorder, includes an active filter, for a video signal, whose passing band width is dependent on a control current value, a current supply circuit for supplying a control current to the active filter, and a changeover circuit for changing over the control current value outputted from the current supply circuit between in a VHS mode and in an SVHS mode.

REFERENCES:
patent: 4340868 (1982-07-01), Pace
patent: 4514704 (1985-04-01), Curtis
patent: 4786986 (1988-11-01), Yamanushi et al.
patent: 4796101 (1989-01-01), Kupfer
patent: 5040082 (1991-08-01), Moro et al.
patent: 5075803 (1991-12-01), Moro et al.
patent: 5225790 (1993-07-01), Noguchi et al.

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