Abstract: A delta-sigma modulator includes a loop filter, a quantizer configured to change an analog output signal into a digital signal, and a digital-to-analog converter configured to receive the digital signal and including a first capacitor and a second capacitor. In a first sampling period, the first capacitor is discharged, and at the same time, the second capacitor is charged with a reference voltage. In a second sampling period, the digital signal includes noise caused by a clock jitter, the first capacitor is charged with a reference voltage, and the second capacitor is discharged and generates a charge corresponding to the noise. In a next first sampling period, the first capacitor is discharged, and at the same time, the second capacitor generates a noise current corresponding to the noise using the charge and is charged with a reference voltage.

Abstract: A reference voltage generator including an electrostatic discharge (ESD) resistor, a first branch coupled to the ESD resistor and including a first capacitor, a second branch coupled to the ESD resistor and including a second capacitor, wherein the first and second capacitors are coupled in parallel, a first switch configured to control a first charge transfer path leading to the first branch, and a second switch configured to control a second charge transfer path leading to the second branch.

Abstract: A delta-sigma modulator includes a loop filter, a quantizer configured to change an analog output signal into a digital signal, and a digital-to-analog converter configured to receive the digital signal and including a first capacitor and a second capacitor. In a first sampling period, the first capacitor is discharged, and at the same time, the second capacitor is charged with a reference voltage. In a second sampling period, the digital signal includes noise caused by a clock jitter, the first capacitor is charged with a reference voltage, and the second capacitor is discharged and generates a charge corresponding to the noise. In a next first sampling period, the first capacitor is discharged, and at the same time, the second capacitor generates a noise current corresponding to the noise using the charge and is charged with a reference voltage.

Abstract: A reference voltage generator including an electrostatic discharge (ESD) resistor, a first branch coupled to the ESD resistor and including a first capacitor, a second branch coupled to the ESD resistor and including a second capacitor, wherein the first and second capacitors are coupled in parallel, a first switch configured to control a first charge transfer path leading to the first branch, and a second switch configured to control a second charge transfer path leading to the second branch.

Abstract: A symmetrical signal generator that includes a first signal part configured to produce a first output pulse signal using a first input pulse signal and a second input pulse signal asymmetrical to each other, and a second signal part configured to produce a second output pulse signal using the first input pulse signal and the second input pulse signal. The second output pulse signal is one inverted to be symmetrical to the first output pulse signal.

Abstract: A symmetrical signal generator that includes a first signal part configured to produce a first output pulse signal using a first input pulse signal and a second input pulse signal asymmetrical to each other, and a second signal part configured to produce a second output pulse signal using the first input pulse signal and the second input pulse signal. The second output pulse signal is one inverted to be symmetrical to the first output pulse signal.