Drum servo circuit

Details Drum servo circuit Drum servo circuit

1986-06-05

1987-08-18

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Synchronizing moving-head moving-record recorders

G11B 2104

Patent

active

046881140

ABSTRACT:
A drum servo circuit for a magnetic recording and/or reproducing apparatus uses a 30 Hz or 60 Hz oscillator circuit (counter), and a trapezoidal wave signal (or a sampling pulse signal) is produced by selectively using threshold values set in the oscillator circuit depending on the play mode, so as to eliminate the need to externally couple a plurality of variable resistors to a monostable multivibrator. A drum motor which drives a rotary drum is controlled responsive to a phase error signal which is obtained by comparing the phase of the trapezoidal wave signal (or the sampling pulse signal) and the phase of a rotation detection signal which is obtained by detecting the rotation of the drum motor.

REFERENCES:
patent: 4490755 (1984-12-01), Takuyama

Affiliated with

Also associated with

Rating

Drum servo circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drum servo circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drum servo circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1121324