DEVICE FOR MAGNETIC RECORDING OF ANALOG SIGNALS Russian patent published in 1998 - IPC

FIELD: information storage equipment. SUBSTANCE: device has high-frequency bias current generator 1, serial circuit of recording amplifier 2, weighting low-pass filter 3, full-wave rectifier 4, accumulating amplifier 5 which is connected to initial level generator 6, and high-frequency bias current modulator 7. High- frequency bias current generator 1 is connected to high-frequency bias current modulator 7. Rejection unit 8 is designed as rejection filter 10 and high-pass filter 11. Output of recording amplifier is connected to rejection filter 10 of rejection unit 8. Output of high- frequency bias modulator 7 is connected to high-pass filter 11 of rejection unit 8, which output is connected to recording magnetic head 9. EFFECT: decreased noise level both in case of signal presence and signal absence. 4 cl, 1 dwg