Comparator circuit and comparator circuit control method

Abstract

The invention discloses a comparator circuit and a comparator circuit control method. The circuit comprises a comparator, a DAC module, a first switch, a second switch, a third switch, a fourth switch, a first capacitor and a second capacitor. The first switch, the third switch and the fourth switch are set in an on state, the second switch is set to be in an off state, so that the comparator outputs a first state at a preset voltage, the first switch, the third switch and the fourth switch are set to be in an off state, the second switch is set to be in an on state, and the comparator executes a circuit operation in the second state. According to the invention, the plurality of switches are controlled to be turned on and off; the comparator is controlled to be in a first state or a secondstate, in the first state, the comparator is in an amplification working mode and outputs reference voltage to the DAC module, in the second state, the comparator is in a comparison working mode, andthrough time division multiplexing of the comparator, the circuit cost is saved, and the circuit area is effectively reduced.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a comparator circuit and a control method for the comparator circuit. Background technique [0002] In recent years, with the rapid development of computer and microelectronic technology, the system chip has become a development trend of current CMOS technology. The obvious feature is that digital signal processing DSP technology has been widely used in various aspects of military and civilian fields. More types of ADC analog-to-digital converters are applied to various scenarios to complete the mutual conversion between natural continuous analog signals and digital signal processing technologies. [0003] A typical ADC circuit includes a sampler, a DAC module, a comparator, and a logic output. The comparator design generally includes an amplifier generator and a comparator. The circuit area is large and the cost is high. Contents of the invention [0004] The present invent...

AI Technical Summary

Problems solved by technology

[0003] A typical ADC circuit includes a sampler, a DAC module, a comparator, and a logic output. The comparator design generally includes an amplifier generator and a comparator. The circuit area is large and the cost is high.

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