Patent ID: 11942152
Assignee: YOSHINORI OKAJIMA
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 9:
10. The approximate search circuit according to claim 1, further comprising:
a control circuit that has a function of switching an operational mode of each of the matching degree determination circuits among a setting mode, a counting mode, and a read/write mode according to a control signal input from the outside, wherein
in the setting mode, pulse signals passing through the activation signal input lines are sequentially applied to the first storage circuit, the number of memory cells which store a value “1” or a value “0” in the first-storage-circuit is counted based on the number of pulse signals passing through the detection lines by the counting circuit, and a value generated based on the counting circuit is written in the second memory circuit,
in the counting mode, pulse signals passing through the activation signal input lines are sequentially applied to the first storage circuit, and the number of pulse signals passing through the detection lines is counted by the counting circuit, and a value generated based on the count value is compared with the value sent from the second memory circuit by the determination circuit, then the ignition signal is put out from the determination circuit when the input data to the first storage circuit through the activation signal input lines are similar enough to stored data in the first storage circuit, and
in the read/write mode, read or write operations are performed on the memory cells in the first storage circuit and/or the second storage circuit.