Magnetic pickup preamplifier

Details Magnetic pickup preamplifier Magnetic pickup preamplifier

1983-05-04

1985-10-15

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 67, G11B 545, G11B 502

Patent

active

045478198

ABSTRACT:
A magnetic pickup which contains both resistance and stray capacitance is terminated by a negative impedance of a kind which compensates for the stray capacitance and part of the resistance, and causes a pole to be produced at a low frequency. This results in the formation of a virtually perfect integrator. Preferably the integrator is followed by a pedestal filter for receiving the output signal of the integrator, and has a zero phase shift point at a predetermined frequency higher than the frequency of the pole and within the frequency band, and has an intermediate frequency band transfer characteristic which increases at a rate of approximately equal to the decrease in transfer characteristic of integrator.

REFERENCES:
patent: 4093965 (1978-06-01), Gish
patent: 4255769 (1981-03-01), Naylor et al.
patent: 4293823 (1981-10-01), Hockberg et al.
patent: 4386378 (1983-05-01), Guisinger
Netzer, Y., "The Design of Low-Noise Amplifiers," Proceedings of the IEEE, vol. 69, No. 6, pp. 739-740, Jun. 1981.

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