Circuit for comparing high frequency amplitude modulated signals

Details Circuit for comparing high frequency amplitude modulated signals Circuit for comparing high frequency amplitude modulated signals

1990-08-15

1992-11-17

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

360 103, 358312, G11B 1514, H04N 578, H04N 979

Patent

active

051648644

ABSTRACT:
A comparison circuit associated with a video tape recorder having two identical legs (41, 42), one of which (41) is connected to a head of a first type and the other (42) to a head of a second type, the outputs of both being connected to a respective input of a comparison means (56) for selecting in "search" mode the head which presents the highest signal amplitude. Each branch comprises, in series, a high-pass filter (45), a variable gain amplifier (46), a multiplier (47), a low-pass filter (48) and a capacitance amplifier (49).

REFERENCES:
patent: 4426666 (1984-01-01), Kobayashi et al.
patent: 4498058 (1985-02-01), Benrud
patent: 4587580 (1986-05-01), Takayama et al.
patent: 4600952 (1986-07-01), Igata et al.
patent: 4672469 (1987-06-01), Namiki et al.
patent: 4760474 (1988-07-01), Takimoto

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