JPS59135511U - tape recorder - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

FIG. 1 is a flowchart for explaining the operation of a conventional recording characteristic automatic adjustment circuit, FIG. 2 is a block diagram of the recording characteristic automatic adjustment circuit of the present invention, and FIGS. 3a and 3b are the circuits shown in FIG. 2. FIG. 2 is a characteristic diagram showing recording bias variable characteristics and recording equalizer compensation characteristics of FIG. Explanation of symbols, 1...Test signal oscillator, 2...
...record equal-'? , 3a, 3b...
... Tape selector switch, 4 ... Recording bias oscillator, 5 ... Bias control circuit, MC.
...Microcomputer, 2a, 2b. 2 Ct, 2 C2, 2C3...Variable time constant circuit, SW...Switch.

Claims (1)

[Scope of utility model registration request] In a tape recorder having an automatic adjustment device configured to be able to adjust the amount of recording bias current and the amount of compensation of a recording equalizer within a predetermined range for each type of magnetic tape, and providing the amount of recording bias current and compensation amount matching the recording characteristics of the magnetic tape used. , a plurality of variable time constant circuits that allow the compensation amount of the recording equalizer to be adjusted within a predetermined range corresponding to a predetermined type of magnetic tape and each having a different time constant variable range; and selecting one of the variable time constant circuits. If the optimum recording bias amount of the magnetic tape used is not within the recording bias adjustment range given by the automatic 1 adjustment device,
After changing the variable time constant circuit by operating the switch, the tape recorder automatically adjusts the recording bias current amount anew.