Reconfigurable digital filter

A digital filter comprising:

• a plurality of integrator groups connecting a plurality of integrators in cascade;
• a plurality of decimation processing sections;
• a plurality of differentiator groups connecting a plurality of differentiators in cascade;
• a first interface section that supplies outputs of the plurality of integrator groups to the plurality of decimating processing sections, and transmits the outputs of the plurality of integrator groups as the first feedback outputs;
• a second interface section that switches outputs from the plurality of decimation processing sections and second feedback outputs according to a function change control signal and supplies these switching results to the plurality of differentiators;
• an input interface section that has a plurality of signal input terminals, switches input signals according to the function change control signal and supplies these switching results to the plurality of integrator groups;
• an output interface section that has a plurality of signal output terminals and switches connection relationships between the plurality of differentiators and the plurality of signal output terminals according to the function change control signal;
• a resource assignment controlling section that, for arithmetic operation resources comprised of the plurality of integrators, the plurality of decimation processing sections and the plurality of differentiators, determines allocation of arithmetic operation resources assigned to new filter processing based on a current use state of arithmetic operation resources and a filter setting candidate list where arithmetic resources required for the new filter processing are set according to a matched filter setting candidate from the filter setting candidate list, and outputs resource assignment determination information;
• a function setting controlling section that outputs the function change control signal for setting functions, to the plurality of integrator groups, the plurality of decimation processing sections, the plurality of differentiator groups, the second interface section, the input interface section and the output interface section, based on the resource assignment determination information;
• and
• a filter processing controlling section that outputs an operation control signal for carrying out desired filter processing, to the plurality of integrator groups, the plurality of decimation processing sections, the plurality of differentiator groups, the second interface section, the input interface section and the output interface section, where functions are set according to the function change control signal.

A digital filter comprising:

• arithmetic operation resources comprised of a plurality of arithmetic operator groups that output accumulation operation results based on multiplication accumulation operation processing for one or more taps;
• an output interface section that selectively adds accumulation operation results of the arithmetic operator groups of the arithmetic operation resources according to a function change control signal for setting functions;
• an input interface section that has a plurality of signal input terminals and supplies desired input signals to the plurality of arithmetic operator groups at the same time or sequentially, according to the function change control signal;
• a resource assignment controlling section that outputs resource assignment determination information for determining allocation of arithmetic operation resources assigned to new filter processing, based on a use state of arithmetic operation resources and a filter setting candidate list where arithmetic operation resources required for the new filter processing are set according to a matched filter setting candidate from the filter setting candidate list;
• a function setting controlling section that outputs the function change control signal to the input interface section and the output interface section, based on the resource assignment determination information;
• and
• a filter processing controlling section that outputs an operation control signal for carrying out desired filter processing, to the arithmetic operation resources, the input interface section and the output interface section, where functions are set according to the function change control signal.

A digital filter comprising:

• arithmetic operation resources comprised of a plurality of integrator groups connecting a plurality of integrators in cascade, a plurality of decimation processing sections, and a plurality of differentiator groups connecting a plurality of differentiators in cascade;
• a first interface section that supplies outputs of the plurality of integrator groups to the plurality of decimation processing sections;
• a second interface section that supplies outputs from the plurality of decimation processing sections which are switched according to a function change control signal for setting functions, to the plurality of differentiators;
• an input interface section that has a plurality of signal input terminals and supplies input signals switched according to the function change control signal, to the plurality of integrator groups;
• an output interface section that selects at least one of output signals of the plurality of differentiator groups according to the function change control signal and outputs the selection result;
• a resource assignment controlling section that outputs resource assignment determination information for determining arithmetic operation resources assigned for new filter processing based on a use state of the arithmetic operation resources and a filter setting candidate list where arithmetic operation resources required for new filter processing are set;
• a function setting controlling section that outputs the function change control signal to the plurality of integrator groups, the plurality of decimation processing sections, the plurality of differentiator groups, the input interface section and the output interface section, based on the resource assignment determination information;
• and
• a filter processing controlling section that outputs an operation control signal for carrying out desired filter processing, to the plurality of integrator groups, the plurality of decimation processing sections, the plurality of differentiator groups, the input interface section and the output interface section where functions are set, according to the function change control signal.