A circuit includes a first line, a second line, a first sub-circuit, and a second sub-circuit. The first line has a first signal. The second line has a second signal. The first sub-circuit is configured to generate a first output signal. The second sub-circuit is configured to generate a second output signal. The first output signal and the second output signal have coupling effects if the first signal and the second signal have coupling effects based on the first line and the second line. The first output signal and the second output signal do not have coupling effects if the first signal and the second signal do not have coupling effects.