Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1986-12-22
1988-07-12
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360 65, G11B 509, G11B 503
Patent
active
047573953
ABSTRACT:
In order to reduce the interference of readout signal waves that increases with the recording density in a magnetic disk device, the readout circuit is provided with a waveform equalizing circuit consisting of a resistance circuit, a delay line, and a differential amplifier to produce a signal advanced by a certain time and attenuated by a certain degree and a signal delayed by a certain time and attenuated by a certain degree. These signals are subtracted from the original signal to decrease the half-value width of the readout signal, thus reducing the interference between the waves. However, these conventional attenuation factors of the advanced and delayed signals cannot be changed freely so that the half-value width of a readout signal cannot fully be decreased without increasing the undershoot in the head or tail portion. Thus, an inverse signal applying circuit is provided to apply the inverted signal to the other end of the resistance circuit to allow complete control of the attenuation factors of the advanced and delayed signals, respectively.
REFERENCES:
patent: 4633200 (1986-12-01), Adler
Y. Ouchi et al., Improvement of Phase Margin by Asymmetric Waveform Equalizer and Write Compensation, the National Convention Record 1984, the Institute of Electronics and Communication Engineers of Japan, 216.
Nishikawa Keiichi
Ohmura Yuji
Canney Vincent P.
Mitsubishi Denki K.K.
LandOfFree
Waveform equalizing circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Waveform equalizing circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Waveform equalizing circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-667930