G - Physics – 11 – B
Patent
G - Physics
11
B
352/21.3
G11B 21/10 (2006.01) G11B 5/56 (2006.01)
Patent
CA 1136763
ABSTRACT OF THE DISCLOSURE A compensation circuit for overshoot, undershoot and delay occurring in response to sudden D. C. level changes in signals received by reactive filters. A D. C. level change, represented by an input signal step applied to the reactive filter is detected by the compensation circuit. The compensation circuit responsively provides a compensa- tion D. C. signal step of a predetermined magnitude and polarity with respect to the input signal step. The compensa- tion step is applied by the circuit to the signal return line of the reactive filter, simultaneously with the input signal step received by the filter to maintain a substantial- ly constant D. C. signal level with respect to the reactive filter elements. The reactive filter elements are thus prevented from charging and discharging in response to the input signal step and filter delay is eliminated.
360944
Ampex Corporation
Macrae & Co.
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