MAGNETIC TAPE RECORDING AND PLAYBACK SYSTEM DESIGNED FOR LOW VOLTAGE DC POWER SOURCES

摘要

A magnetic tape recording and playback system designed to be powered from low voltage DC sources includes its own integral power supply that supplies a high voltage alternating output of a frequency of 30 kHz. to 100 kHz. to drive the bias and erase circuits and also supplies a DC voltage higher than the DC source voltage for powering the pre-amplifiers and power amplifiers in the system. It is particularly adaptable to systems employing integrated circuits (ICs) in the amplifier circuits, such as are now being sold for installation in automobiles.