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Accuracy reconfigurable delay line ADC circuit for digital power supply

A technology of analog-to-digital converter and digital power supply, which is applied in the direction of analog-to-digital converters, etc. It can solve the problems of high power consumption waste and insufficient voltage precision, so as to reduce power consumption, meet the requirements of power consumption and precision, and meet high-precision required effect

Active Publication Date: 2015-08-19
邳州德好农产品加工有限公司
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Problems solved by technology

[0004] If the precision of the analog-to-digital converter in the digital power supply is high, when the output voltage changes greatly, the high power consumption of the high-precision analog-to-digital converter is a waste; but if the precision of the analog-to-digital converter is low, it is less Voltage accuracy at stable output may not be sufficient

Method used

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  • Accuracy reconfigurable delay line ADC circuit for digital power supply
  • Accuracy reconfigurable delay line ADC circuit for digital power supply
  • Accuracy reconfigurable delay line ADC circuit for digital power supply

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Embodiment

[0040] figure 1 A block diagram of a 4-bit delay line analog-to-digital converter. The working process is divided into two parts: calibration and quantification. figure 2 Schematic diagram of the operation of the calibration portion of the 4-bit delay line ADC. In an ideal situation, the signal is sequentially transmitted from the 1st delay unit to the 17th delay unit. After the signal passes through the nth delay unit, it is dn, and each time it passes through a delay unit, the delay time is t d , then the total delay time after 16 delay units is 16t d . In order for the analog-to-digital converter to accurately quantify the input voltage, it is necessary to ensure that the signal is just transmitted from the first delay unit to the 17th delay unit within one clock cycle, that is, to satisfy 16t d equal to the length of one clock cycle T D .

[0041] In order to ensure that the delay unit can maintain the correct delay time under different processes, power supply volt...

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Abstract

The present invention discloses an accuracy reconfigurable delay line ADC circuit for a digital power supply. The circuit comprises a comparator, a delay chain, an encoder and a transfer switch, wherein the comparator is responsible for comparing input voltage and reference voltage to generate an error amount. The delay chain is formed by 33 delay units which are opened or closed selectively according to precision needs. Each of the delay units is controlled by tail pipe current, and a thermometer code is generated according to the sampling of the error amount. The encoder carries out code conversion on the thermometer code obtained through sampling to be a binary code. The transfer switch is opened or closed according to different needs of a system such that an ADC works in different accuracies. According to the ADC provided by the invention, the ADC can work in two accuracies according to system needs, and the compromise between accuracy and power consumption is realized.

Description

Technical field: [0001] The present application relates to a digital power supply for portable mobile electronic equipment, in particular to a precision reconfigurable delay line analog-to-digital converter circuit for digital power supply. Background technique: [0002] Digital power supply is widely used in portable mobile electronic devices due to its insensitivity to environmental and process parameters, control algorithm can be realized through programming, easy integration, energy saving and environmental protection. The working environment and load of the digital power supply may change at any time, which may cause a sudden large change in its output voltage, which requires the digital power supply to realize the function of dynamic voltage adjustment. As a key module of the digital power supply, the analog-to-digital converter plays a key role in the process of realizing dynamic voltage adjustment of the digital power supply. [0003] The delay line analog-to-digita...

Claims

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Application Information

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IPC IPC(8): H03M1/12
Inventor 李尊朝赵丽娟王闯赵凯
Owner 邳州德好农产品加工有限公司
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