Cassette type tape recorder

Cassette-type recording and/or reproducing apparatus with inadve

Central dictation system

Changeover circuit in tape recorder

Changeover writing circuit for magnetic disk apparatus operable

Circuit and method for controlling the gain of an amplifier

Circuit and method for controlling the gain of an amplifier...

Circuit and method for determining the phase difference...

Circuit and method for maintaining a rotation position...

Circuit and method for optimizing bias supply in a magnetoresist

Circuit and method for optimizing bias supply in a magnetoresist

Circuit and method for write current driver

Circuit apparatus for driving a magnetic head

Circuit arrangement for correcting frequency response in accorda

Circuit arrangement for reversing a magnetic field

Circuit arrangement for shaping an analog read output signal in

Circuit arrangement for the selective suppression and nonsuppres

Circuit for comparing high frequency amplitude modulated signals

Circuit for reduction and optimization of write-to-read...

Circuit for simultaneously generating the sounds of both main pi