JPH0462501U

JPH0462501U -

Info

Publication number: JPH0462501U
Application number: JP10592790U
Authority: JP
Priority date: 1990-10-11
Filing date: 1990-10-11
Publication date: 1992-05-28

Description

[Brief explanation of the drawing]

第１図は本考案の概念を示すブロツク図、第２
図は本考案の第１の実施例を示す回路図、第３図
はサーミスタの温度特性図、第４図は本考案の第
２の実施例を示す回路図、第５図は本考案の第３
の実施例を示す回路図、第６図は従来例の回路図
、第７図は磁気記録回路における記録電流−再生
レベル特性図である。１……記録電流供給源、２……記録ヘツド、３
……制御部、４……サーミスタ、５……抵抗、６
……自動利得調整回路、７……レベル検出回路。 Figure 1 is a block diagram showing the concept of the present invention, Figure 2
The figure is a circuit diagram showing the first embodiment of the present invention, Fig. 3 is a temperature characteristic diagram of the thermistor, Fig. 4 is a circuit diagram showing the second embodiment of the present invention, and Fig. 5 is a circuit diagram showing the second embodiment of the present invention. 3
FIG. 6 is a circuit diagram of a conventional example, and FIG. 7 is a recording current-reproduction level characteristic diagram in a magnetic recording circuit. 1... Recording current supply source, 2... Recording head, 3
...Control unit, 4...Thermistor, 5...Resistor, 6
...Automatic gain adjustment circuit, 7...Level detection circuit.

Claims

[Scope of Claim for Utility Model Registration] A recording current supply source that generates a recording current in a deep recording type magnetic recording circuit that records an audio signal in the deep layer and a video signal in the surface layer of the same track on a recording tape. , recording characterized in that a control section for controlling the recording current in a direction to cancel temperature drift due to ambient temperature during recording is inserted in an electric path connecting the recording head to a recording head that performs recording on the tape based on the recording current. Magnetic recording circuit that responds to temperature changes.