Combined detector circuit for detecting a tape end or unrecorded

Details Combined detector circuit for detecting a tape end or unrecorded Combined detector circuit for detecting a tape end or unrecorded

1985-03-14

1987-01-13

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 721, 360 73, 360 746, G11B 1518, G11B 2722

Patent

active

046368787

ABSTRACT:
An automatic fast action automatic reversing tape recording system comprising a first detecting circuit for generating a first output signal which changes from one state to another state only when the end of the record coated portion of the tape is detected by the sensor in the forward mode of the apparatus, a second detecting circuit for generating a second output signal which changes from one state to another state only when a non-recorded area of the tape is detected in the fast-forward or fast-rewind mode of the apparatus, a third detecting circuit to which both of said first and second output signals are supplied for generating a switching signal to change the mode of the apparatus when either of said output signals is maintained in said another state for predetermined times measured by the same time constant circuit. The third detecting circuit may include an integration circuit which is charged to different DC voltages by said first or second output signals which are in their one state in response to the mode of the apparatus and are then discharged along a time constant from a time when each of said first or second output signals changes to its said other state.

REFERENCES:
patent: 3846831 (1974-11-01), Johnson, Jr. et al.
patent: 3893177 (1975-07-01), Takenaka
patent: 4138698 (1979-02-01), Kokei
patent: 4404604 (1983-09-01), Ueki et al.
patent: 4413290 (1983-11-01), Furuta
Radio Electronics "New for Cassettes Automatic Program Search" Savon, Mar. 1977, pp. 52-53.

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