Patent
1992-08-11
1995-05-16
Gellner, M. L.
G03B 1724
Patent
active
054165458
ABSTRACT:
A magnetic recording-reproducing circuit in a camera includes a magnetic head for reproducing information recorded on a magnetic recording portion, a first amplifying circuit having at least two input ends, the output of the magnetic head being connected to one of the input ends of the first amplifying circuit, a second amplifying circuit having at least two input ends, the output of the magnetic head being connected to one of the input ends of the second amplifying circuit, a first impedance for connecting the other input end of the first amplifying circuit and the other input end of the second amplifying circuit together, a second impedance for connecting the other input end and the output end of the first amplifying circuit together, and a third impedance for connecting the other input end and the output end of the second amplifying circuit together. The circuit also includes first and second comparison circuits and a binarization circuit for binarizing information recorded on the film on the basis of outputs of the first and second comparison circuits.
REFERENCES:
patent: 4403264 (1983-09-01), Watatani et al.
patent: 4851935 (1989-07-01), Ohyama et al.
patent: 4964139 (1990-10-01), Wash et al.
patent: 5155511 (1992-10-01), Tamamura
patent: 5191435 (1993-03-01), Tsunerawa et al.
Okamura, "The Design of OP Amplifying Circuits," CQ Publishing Co., Ltd., pp. 128 and 129.
Canon Kabushiki Kaisha
Gellner M. L.
Tuccillo Nicholas J.
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