Comparator circuit with low power consumption and low kickback noise
AssigneeNational Chiao Tung University
InventorsShih-Hsing Wang, Chung-Chih Hung
Life of this patent
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Abstract
A comparator circuit with low power consumption and low kickback noise includes a first dynamic comparator and a second dynamic comparator. The first dynamic comparator is a pre-amplifier for the second dynamic comparator. An enable switch which is connected to the first dynamic comparator has a control terminal connected to a resistance device. The resistance device and the enable switch form a RC delay circuit to reduce the kickback noise of the comparator circuit. Since the comparator circuit is composed of dynamic comparators, the power consumption of the comparator circuit is lower.
Claims14
A comparator circuit with low power consumption and low kickback noise configured to compare a first input signal and a second input signal to generate a first comparison signal and a second comparison signal which is complementary to the first comparison signal, and the comparator circuit comprising:
- a first dynamic comparator configured to compare the first input signal and the second input signal to generate a first output signal and a second output signal;
- a second dynamic comparator connected the first dynamic comparator and configured to generate the first comparison signal and the second comparison signal based on the first output signal and the second output signal;
- a first enable switch connected to the first dynamic comparator, having a parasitic capacitance, and configured to activate or deactivate the first dynamic comparator;
- a second enable switch connected to the second dynamic comparator, and configured to activate or deactivate the second dynamic comparator;
- and
- a resistance device connected to a control terminal of the first enable switch, wherein the resistance device and the parasitic capacitance form an RC delay circuit to reduce kickback noise of the comparator circuit.
A comparator circuit with low power consumption and low kickback noise, comprising:
- a dynamic comparator configured to compare the first input signal and the second input signal to generate a first comparison signal and a second comparison signal, wherein the second comparison signal is complementary to the first comparison signal;
- an enable switch connected to the first dynamic comparator and having parasitic capacitance, and configured to activate or deactivate the dynamic comparator;
- and
- a resistance device connected to a control terminal of the enable switch, wherein the resistance device and the parasitic capacitance form an RC delay circuit to reduce kickback noise of the comparator circuit.
Dependencies are inferred from the claim text.