AGC circuit with constant envelope circuit for reproduced RF sig

Analog encoder decoder circuit

Anti-copy system utilizing audible and inaudible protection sign

Apparatus and method for retrieving audio signals from a recordi

Apparatus for magnetically recording and/or reproducing digital

Apparatus for producing recorded tape-like magnetic record carri

Apparatus for recording and reproducing a digitized audio signal

Apparatus for recording and reproducing a video signal and for r

Apparatus for recording and reproducing digital and analog video

Apparatus for writing signal density information on a magnetic m

Audio signal recording apparatus and reproducing apparatus

Audio signal reproducing apparatus

Audio system having a time base error correction arrangement

Audio tape operation on a DAT data storage drive

Automatic time-base error correction system