JPS648439A - Arithmetic circuit for fuzzy control - Google Patents

Abstract

PURPOSE:To reduce the area of a circuit and to speed up a processing by monitoring data on a data bus, executing the arithmetic processing of data and executing operation necessary for fuzzy control in parallel. CONSTITUTION:Two data transferred to a data bus are detected by a monitoring circuit 3 and informed to registers 2a, 2b and a comparator 4. A smaller value is applied to the comparator 4. When data applied from the comparator 4 are A, a line decoder 5 writes the data of (A+1) digits as real data in a storage circuit 7 in a writing mode in response to a control signal 9, and in an operation mode, holds the maximum value of the data and processes the data similarly to the writing mode. A clear circuit 6 turns all digits under the digits selected by the decoder 5 to real values. The storage circuit 7 also holds the data in the circuit 6 in the writing mode in response to the signal 9, and in the operation mode, clears data in the unreal digits of the signal from the circuit 6. An encoder 8 forms binary data based on the most significant value of data obtained from the circuit 7. Thus, high speed processing can be attained.