Abstract
The paper describes an implementation technique for digital filters based on the use of microprogrammable bipolar bit-slice microprocessors. The filter characteristics are determined by a set of microprograms stored in a programmable read-only memory, a particular filter response being selected by calling up an appropriate microprogram. Fast operation can be achieved by a ternary coding of the filter coefficients plus the use of the bipolar technology, whilst the use of microprogrammable bit-slice computing elements gives a high degree of flexibility. By making use of the redundancies introduced due to the restricted microinstruction set required to compute the filter algorithm, and the simple sequencing requirements of the microprograms, system complexity can be considerably reduced.
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