A transmitting circuit includes an internal circuit, a first dividing circuit, a second dividing circuit, a delay circuit, a first switching circuit, and a second switching circuit. The first dividing circuit is coupled between a first power voltage and the internal circuit, and the second dividing circuit is coupled between a second power voltage and the internal circuit. The delay circuit is configured to generate a switching control signal by delaying an output signal of the internal circuit for a delay time. The first switching circuit is coupled in parallel to the first dividing circuit, wherein the first switching circuit is coupled between the first power voltage and the internal circuit and is configured to be switched in response to the switching control signal.