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The two circuits, A and B, modeled by Verilog below are logic equivalent.
module circuit_A( clk , rstn , A , B , C , F ); input clk ;//Input clock input rstn ;//A-sync reset signal, low active input A ; input B ; input C ; output F ; reg F ; wire F_w ; assign F_w = (B && !C) || (!A && B); always @ (posedge clk or negedge rstn) begin if (!rstn) begin F <= 1'b0; end else begin F <= F_w; end end endmodule module circuit_B( clk , rstn , A , B , C , F ); input clk ;//Input clock input rstn ;//A-sync reset signal, low active input A ; input B ; input C ; output F ; reg F ; wire F_w ; always @ (posedge clk or negedge rstn) begin if (!rstn) begin F <= 1'b0; end else begin if (F_w) F <= 1'b1; else F <= 1'b0; end end assign F_w = (B && !A )||(!C && B); endmodule