Comparator circuit and comparator circuit control method

A comparator circuit, comparator technology, applied in the direction of instruments, electrical components, electrical signal transmission systems, etc., can solve the problems of high cost and large circuit area, and achieve the effect of reducing the area and saving the circuit cost.

Pending Publication Date: 2019-07-19
SHENZHEN YSPRING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 d

Method used

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  • Comparator circuit and comparator circuit control method
  • Comparator circuit and comparator circuit control method
  • Comparator circuit and comparator circuit control method

Examples

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Example Embodiment

[0026] It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

[0027] like figure 1 shown, figure 1 It is the circuit diagram of the traditional comparator circuit in the DAC circuit, including the eleventh voltage dividing resistor R11, the twelfth voltage dividing resistor R12, the DC power supply VDD, the amplifier A1, the comparator A2, the DAC module A3, and the eleventh capacitor C11. , the twelfth capacitor C12, the eleventh switch K11 and the twelfth switch K12, one end of the eleventh voltage dividing resistor R11 is connected to the DC power supply VDD, and the other end of the eleventh voltage dividing resistor R11 is connected to the One end of the twelfth voltage dividing resistor R12, the other end of the twelfth voltage dividing resistor R12 is grounded, and the positive input end of the amplifier A1 is connected to the eleven voltage dividing resistor R...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): H03M1/46
CPCH03M1/46
Inventor 谷京儒林宏达
Owner SHENZHEN YSPRING TECH
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