Method for increasing comparison speed of comparator circuit and comparator circuit

Abstract

The invention discloses a method for increasing comparison speed of a comparator circuit, a charge pump and an improved comparator circuit, and relates to the field of comparator circuits. The limit of a power voltage to the speed of a comparator is reduced, and the comparison speed of the comparator is increased at the low power voltage. The charge pump comprises a first switch, a second switch, a third switch and a charge pump capacitor, wherein one end of the first switch is connected with a voltage boost source of the charge pump, and the other end of the first switch is connected with the comparator circuit; one end of the second switch is grounded, and the other end of the second switch is connected with the charge pump capacitor; one end of the third switch is connected with the power voltage and the other end of the third switch is connected with the charge pump capacitor; the second switch and the third switch are connected with the same side of the charge pump capacitor; and one end of the charge pump capacitor not connected with one end of the second switch is connected with the comparator circuit. The method for increasing comparison speed of the comparator circuit is applied to the comparator circuit.

Description

technical field [0001] The invention relates to the field of comparator circuits, in particular to a method for increasing the comparison speed of the comparator circuit, a charge pump and an improved comparator circuit. Background technique [0002] In the integrated circuit system, the comparator circuit is a very common and very important module. Its comparison speed is the main performance index of the circuit. In the high-speed analog-to-digital converter / digital-to-analog converter circuit, the speed of the comparator affects the circuit One of the main factors of performance. [0003] In the prior art, comparator circuits are implemented in different ways, but the main functional modules are similar, mainly composed of a pre-amplification circuit and a latch circuit, and the comparison time of the comparator is jointly determined by the pre-amplification circuit and the latch circuit. [0004] In the process of realizing the above technical solution, the inventor fou...

AI Technical Summary

Problems solved by technology

[0005] The comparison speed of the comparator circuit is affected by the power supply voltage. The lower the power supply voltage, the slower the comparator speed. In the application of low power supply voltage, the comparator speed is slow, which affects the overall performance of the circuit.

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