Browse Prior Art Database

STEREO TAPE CONVERTER

IP.com Disclosure Number: IPCOM000005501D
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2001-Oct-10
Document File: 2 page(s) / 71K

Publishing Venue

Motorola

Related People

Peter St. Clair Manson: AUTHOR

Abstract

The block diagram shows a stereo tape converter for adding a tape player function to FM Stereo radio receivers for either automobile or home entertainment use.

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,hA MOTOROLA Technlcal Developments Volume 3 March 1983

STEREO TAPE CONVERTER

By Peter St. Clair Manson

The block diagram shows a stereo tape converter for adding a tape player function to FM Stereo radio receivers for either automobile or home entertainment use.

   A stereo tape player, which can be of the cassette type, eight-track type or any other type, recovers the audio information from the tape and provides the information on left(L) and right(R) channels to a tape preamplifier. The tape preamplifier provides a desired level of amplification of the audio signals. The audio signals from the tape preamplifier may then be optionally processed for noise reduction, such as that of the Dolby (a trademark of Dolby Laboratories) type. The stereo tape converter may also optionally provide a tone amplifier with adjustable external controls to provide the desired tone to the audio signals. The left and right audio information is then encoded by a stereo encoder to provide a composite FM signal to an FM modulator. The modulator, in combination with an oscillator in the FM band, provides an encoder FM signal to an FM stereo radio.

   Typically the FM stereo signal from the tape converter would be provided to the antenna terminal of the FM stereo radio. In an automotive radio, the car antenna would be plugged into the stereo tape con- verter and a two-way switch would either pass the signal from the antenna on to the stereo FM radio, or alternatively, provide the FM modulated...