Patent ID: 8044728

Claim:
An integrated circuit comprising: a first inverter comprising a first transistor of a first conductivity type, a second transistor of a second conductivity type coupled in parallel with the first transistor, an input configured to receive an oscillating input signal, and an output configured to deliver an oscillating output signal, said first and second transistors each comprising a control terminal coupled to said input of said first inverter and a conduction terminal coupled to the output of said first inverter, said first transistor comprising a second conduction terminal to be coupled to a reference voltage, and said second transistor comprising a second conduction terminal to be coupled to a supply voltage; a capacitive device coupled to said output of said first inverter and capable of being charged and discharged depending on the state of the first and second transistors being on or off; and a selector configured to transmit the oscillating output signal and configured to mask at least one of the charging and discharging of said capacitive device, said selector comprising a second inverter comprising a third transistor of the first conductivity type, a fourth transistor of the second conductivity type coupled in parallel with said third transistor, and an output, said third and fourth transistors each comprising a control terminal coupled to said input of said first inverter and a conduction terminal coupled to the output of said second inverter, said fourth transistor comprising a second conduction terminal to be coupled to the supply voltage, said third transistor comprising a second conduction terminal coupled to the output of said first inverter.