JPH0239330U - - Google Patents

Description

[Brief explanation of drawings]

1 to 6 show an embodiment of the DAT according to this invention, FIG. 1 is a functional block diagram, FIG. 2 is a hardware block diagram, and FIG. 3a is a reproduction RF
Figure 3b is a waveform diagram of the detected envelope, Figure 3c is a diagram showing the envelope signal which is the output signal of the envelope detector, Figure 4 is a flowchart, and Figure 5A is an offset diagram. A diagram showing the state where the value is increasing, Figure 5B is the same as Figure 5A.
FIG. 6A is a diagram showing a state in which the envelope signal is increased or decreased based on the offset value of FIG. 6B. FIG. 3 is a diagram showing the state of increase/decrease in the envelope signal. Explanation of main symbols: 1: Magnetic recording tape, 2: Head, 3: Recording/reproducing device, 4: Envelope detector, 5: ATF servo circuit, 6: Motor driver, 7
: Capstan, 8: Microcomputer, 3
a: Reproduction RF signal, 3b: ATF reproduction signal, 4a
: Envelope signal.

Claims (1)

[Scope of Claim for Utility Model Registration] In a DAT consisting of a detector that performs envelope detection of a reproduced RF signal and an ATF servo circuit, an offset setting means for increasing or decreasing an offset value of the ATF servo circuit, and an offset set by the offset setting means Regeneration F obtained based on the value
and identification means for identifying an increase or decrease in an envelope of an R signal, and the offset value of the ATF servo circuit is set to a value immediately before the envelope changes from increasing to decreasing.