A bootstrap circuit, comprising: a receiving circuit for receiving an input signal, and the receiving circuit is configured to selectively pass the input signal to generate an output signal according to a control signal; a switched capacitor module, for generating the control signal according to the input signal; and a booting circuit, coupled to the receiving circuit, for applying an initial voltage when the control signal starts to enable receiving circuit, to increase a voltage level of the control signal; wherein the switched capacitor module is controlled by using a clock signal and an inverted clock signal, and the booting circuit is configured to generate the initial voltage according to the clock signal such that the control signal is boosted from a supply voltage to a boosted voltage being the sum of the input voltage and said supply voltage; wherein the booting circuit further comprises: a pulse generator, for receiving the clock signal or the inverted clock signal to generate a pulse signal; and a control transistor comprising a gate electrode, a first electrode and a second electrode, wherein the first electrode of the control transistor is coupled to the supply voltage, the control transistor being arranged to receive the pulse signal at the gate electrode to selectively connect the supply voltage to the second electrode to generate the initial voltage, characterized in that the pulse generator is configured to generate the pulse signal such that the initial voltage is applied to increase the voltage level of the control signal only at the rising edge of the control signal or at the rising edge of the clock signal. a receiving circuit for receiving an input signal, and the receiving circuit is configured to selectively pass the input signal to generate an output signal according to a control signal; a switched capacitor module, for generating the control signal according to the input signal; and a booting circuit, coupled to the receiving circuit, for applying an initial voltage when the control signal starts to enable receiving circuit, to increase a voltage level of the control signal; wherein the switched capacitor module is controlled by using a clock signal and an inverted clock signal, and the booting circuit is configured to generate the initial voltage according to the clock signal such that the control signal is boosted from a supply voltage to a boosted voltage being the sum of the input voltage and said supply voltage; wherein the booting circuit further comprises: a pulse generator, for receiving the clock signal or the inverted clock signal to generate a pulse signal; and a control transistor comprising a gate electrode, a first electrode and a second electrode, wherein the first electrode of the control transistor is coupled to the supply voltage, the control transistor being arranged to receive the pulse signal at the gate electrode to selectively connect the supply voltage to the second electrode to generate the initial voltage, characterized in that the pulse generator is configured to generate the pulse signal such that the initial voltage is applied to increase the voltage level of the control signal only at the rising edge of the control signal or at the rising edge of the clock signal. a pulse generator, for receiving the clock signal or the inverted clock signal to generate a pulse signal; and a control transistor comprising a gate electrode, a first electrode and a second electrode, wherein the first electrode of the control transistor is coupled to the supply voltage, the control transistor being arranged to receive the pulse signal at the gate electrode to selectively connect the supply voltage to the second electrode to generate the initial voltage, characterized in that the pulse generator is configured to generate the pulse signal such that the initial voltage is applied to increase the voltage level of the control signal only at the rising edge of the control signal or at the rising edge of the clock signal.