Dynamic transient response filter

Details Dynamic transient response filter Dynamic transient response filter

1977-03-25

1979-01-09

Heyman, John S.

328149, 328163, H03K 508

Patent

active

041340744

ABSTRACT:
A filtering system for use in an FM modulating system. The filtering system provides frequency limiting of an input signal and does not overshoot amplitude limitations thereof. This filtering system includes a first filter and a second filter, separated by an overshoot compensator. The compensator modifies the output of the first filter in such a manner that, when the modified signal is filtered by the second filter, an output signal will be provided which does not overshoot a preselected amplitude. The overshoot compensator includes a threshold clipper which separates out any overshoot component generated by the first filter, an amplifier which amplifies the overshoot component, and a subtractor circuit which subtracts the amplified overshoot component from the output of the first filter to provide the modified signal. The second filter is of a type which provides a constant delay for all frequencies within the passband on the filtering system.

REFERENCES:
patent: 3094670 (1963-06-01), Batchelor
patent: 3566285 (1971-02-01), Schroeder
patent: 3866151 (1975-02-01), Tajima et al.

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