Oversampling type finite impulse responsive filter
June 24, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDigital filter employing PROM for storing positive and negative impulse response values Digital filter arrangement having memory means with addressable words stored therein Method and a circuit arrangement for digital signal processing utilizing adaptive transversal filter techniques Waveform shaping circuit Memory for programmable digital filter Programmable digital filter 5117385 InventorAssigneeApplicationNo. 080974 filed on 06/24/1993US Classes:708/319TransversalExaminersPrimary: Malzahn, David H.Attorney, Agent or FirmInternational ClassG06F 015/31Foreign Application Priority Data1990-12-28 JPAbstractDigital data provided in the form of a serial signal is fetched into an N-bit shift register and parallel N-bit data output therefrom is provided as address data to address input terminals of a memory. In the memory there are prestored at respective addresses defined by the N-bit data the total sum value of multiplied outputs obtained by multiplying the address values and the bit data of a coefficient h(n-i) defining an impulse response characteristic. The N-bit data is provided to an address input terminal of the memory to read out therefrom a digital value corresponding to the output voltage of a digital filter. The digital value is D/A converted to obtain the output voltage of the digital filter.Other References
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