Abstract: A digital fuzzy inference apparatus performs fuzzy inference by time-divisional control. A latch circuit latches an input signal. A parameter storage circuit stores a plurality of sets of parameters for defining membership functions constituting a plurality of fuzzy rules. A parameter switching circuit sequentially and selectively outputs one of the plurality of sets of parameters from the parameter storage circuit in accordance with a clock pulse. Every time one set of parameters are output from the parameter switching circuit, a single operation circuit performs a fuzzy rule operation with respect to the input signal stored in the latch circuit by using a membership function defined by the parameters, and outputs a degree to which the input signal meets the rule. An operation result storage circuit stores the output from the operation circuit at a storage position designated by the output parameters.

Abstract: In a camera of the present invention, an extension amount of a focusing lens is determined from a plural kind of table data for determining the extension amount of the lens from information on the distance to an object and information on the set focal distance.The camera has a storage unit for storing the zooming direction of an optical system during zooming, a selection unit for selecting data from the plural kind of table data on the basis of the contents stored in the storage unit, and an arithmetic unit for computing an extension amount of a focusing lens on the basis of the data selected by the selection unit.

Abstract: A digital fuzzy inference apparatus performs fuzzy inference by time-divisional control. A latch circuit latches an input signal. A parameter storage circuit stores a plurality of sets of parameters for defining membership functions constituting a plurality of fuzzy rules. A parameter switching circuit sequentially and selectively outputs one of the plurality of sets of parameters from the parameter storage circuit in accordance with a clock pulse. Every time one set of parameters are output from the parameter switching circuit, a single operation circuit performs a fuzzy rule operation with respect to the input signal stored in the latch circuit by using a membership function defined by the parameters, and outputs a degree to which the input signal meets the rule. An operation result storage circuit stores the output from the operation circuit at a storage position designated by the output parameters.