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Pipe type difference A/D converter

A technology of digital converter and differential mode, which is applied in the field of pipeline differential analog-to-digital converter and analog-to-digital converter, and can solve problems such as unfavorable differential analog-to-digital converters

Inactive Publication Date: 2009-12-02
廉仁淳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the pipeline ADC is concerned, the transmission of the residual value between adjacent two stages is the factor that most affects the resolution and operating frequency of the ADC. The existing residual value transmission scheme is mainly through the single-ended operational transconductance amplifier, which is not conducive to the realization of differential analog-to-digital converters

Method used

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  • Pipe type difference A/D converter
  • Pipe type difference A/D converter
  • Pipe type difference A/D converter

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Embodiment Construction

[0049] We propose the use of differential operational transconductance amplifiers combined with switch MOS transistors and capacitors to achieve analog-to-digital conversion. Figure 4 shown.

[0050] attached Figure 4 The switch marked with PHI_1, PHI_1P or PHI_2 is a switch MOS transistor, which is implemented by connecting the gate of the NMOS to the PHI_1 or PHI_2 signal line respectively. Connect the differential operational transconductance amplifier to four capacitors with the same capacitance value through the switch MOS tube. The connection method is as attached Figure 4 As shown, it can be seen that, unlike the existing single-ended operational transconductance amplifier implementation scheme, since we use a differential operational transconductance amplifier, the residual value output of each sub-ADC is a For differential signals, this facilitates the implementation of differential analog-to-digital converters. The following is the specific working project of t...

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Abstract

The invention discloses a pipe type differential analog to digital converter, which realizes the precise residual value to the back level provided by the front level in the pipe type differential analog to digital converter through using the differential operation transconductance amplifier combining a switch MOS pipe and a capacitance. The analog to digital converter of the invention solves the problems of being unable to realize the differential analog to digital converter of the single end operation transconductance amplifier.

Description

technical field [0001] The invention relates to an analog-to-digital converter, in particular to a pipeline-type differential analog-to-digital converter, which belongs to the technical field of microelectronics. Background technique [0002] In recent years, the technology of analog-to-digital conversion has played a very important role in many applications. An analog-to-digital converter (ADC) converts analog information in real life into digital signals, and is a bridge between the real world and the digital world. In the field of communication, consumer electronics, and industrial control, it is often used. Faced with the increasingly higher requirements in practical applications, the sampling frequency, resolution, stability, power consumption and area requirements of the analog-to-digital converter are getting higher and higher. [0003] Pipeline analog-to-digital converters are frequently used in several popular analog-to-digital converters because of their excellent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
Inventor 曹喜信孙金铎吴亚东白书俊彭春干曹健刘越张兴于敦山
Owner 廉仁淳