JPS6329268U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of this invention, Fig. 2 is an explanatory diagram of the operation of an embodiment of this invention, Fig. 3 is a block diagram of a conventional data recorder, and Fig. 4 is an explanatory diagram of the conventional operation. be. In the figure, A is a reproduction recording control signal, B is a data protection detector output signal, C is a recording prohibition signal, D is a tape running prohibition signal, E is a recording amplifier circuit output permission signal, F is a reproduction electric signal, and G is a search signal. , H is a tape rewinding signal, _T1 is a search time, _T2 is an unrecorded part judgment time, _T3 is a tape rewinding time, 1 is a cassette tape, 2 is a data protection setting claw, 3 is a function setting circuit, 4 is a recording condition comparison circuit, 5 is a data protection detector, 6 is a tape speed control circuit, 7 is a tape drive section, 8 is an input amplifier circuit, 9 is a recording amplifier circuit,
10 is a recording head, 11 is a reproduction head, 12
13 is a reproduction amplification circuit, 13 is an output amplification circuit, and 14 is an unrecorded portion detection circuit. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A function setting circuit that sets data playback, recording, tape running speed, etc., a protection detector that detects whether the data on the cassette tape is protected, and the output of the data protection detector and the setting conditions of the function setting circuit. and a recording condition comparison circuit that outputs a recording inhibit signal and a tape running inhibit signal when data protection settings and recording settings are made at the same time, and a recording condition comparison circuit that outputs a tape running speed to match the setting value of the function setting circuit. a tape speed control circuit that controls a tape drive section; a tape drive section that runs a cassette tape according to the output of the tape speed control circuit; an input amplification circuit that amplifies input data to a certain level; and the input amplification circuit. A recording amplifier circuit which corrects the frequency characteristics of the output of the circuit and amplifies and outputs the output only when the recording amplifier circuit output permission signal from the function setting circuit is in the permission state, and magnetically records on the tape according to the output of the recording amplifier circuit. a recording head for recording, a reproduction head for converting magnetic signals recorded on the tape by the head into electrical signals;
a regenerative amplifier circuit that corrects frequency characteristics of the electrical signal of the reproducing head and reproduces the input data of the input amplifier circuit recorded on tape; and an output amplifier circuit that amplifies the output of the regenerative amplifier circuit to a predetermined level. In the tape recorder equipped with the above-mentioned tape recorder, the output of the reproduction amplification circuit is monitored in response to the tape running prohibition signal from the recording condition comparison circuit, and the final portion of the data in which both the DC level and the AC level continue to be zero at the rear of the data is detected. The present invention is characterized by comprising an unrecorded portion detection circuit for detecting and rewinding the tape for a predetermined time based on the detection signal, and for introducing a tape rewind signal to the tape speed control circuit via the recording condition comparison circuit. data recorder.