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A/D direct computing conversion, A/D cascade converter and use thereof

A cascaded converter and analog-to-digital conversion technology, which is applied in the direction of analog-to-digital converter, analog/digital conversion, code conversion, etc., can solve the problems of high cost, low conversion rate, complex and large-scale circuits, etc.

Inactive Publication Date: 2012-01-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Double integral type analog-to-digital converter, Σ-Δ type analog-to-digital converter: the circuit is more complex and the conversion rate is low
[0006] Successive approximation analog-to-digital converters, pipelined analog-to-digital converters: the circuit is more complex, the conversion speed is average, and the price of high-precision A / D chips is higher
[0007] Parallel comparison type analog-to-digital converter: large-scale circuit complexity and high cost

Method used

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  • A/D direct computing conversion, A/D cascade converter and use thereof
  • A/D direct computing conversion, A/D cascade converter and use thereof
  • A/D direct computing conversion, A/D cascade converter and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0107]Dual Supply 16-Bit Economical Analog-to-Digital Converter

[0108] The schematic diagram of the dual power supply 16-bit economical analog-to-digital converter is as follows Figure 17 shown.

[0109] The dual-power 16-bit economical analog-to-digital converter consists of a sample-and-hold circuit S / H, four four-bit simple analog-to-digital cascade converters, two eight-bit latches, and two regulated power supplies.

[0110] Four four-bit simple A / D cascade converters are connected in cascade to form a cascade structure. The analog signal input terminal is connected to the output terminal of the sample and hold circuit S / H, and the sample and hold circuit S / H is connected to an external analog input. Signal.

[0111] The 16-bit digital signals output by four four-bit simple A / D cascade converters are respectively connected to the inputs of two eight-bit latches.

[0112] The two regulated power supplies output positive and negative power supply voltages respectively,...

Embodiment 2

[0116] Dual power supply 16-bit high-speed analog-to-digital converter

[0117] The schematic diagram of the dual power supply 16-bit high-speed analog-to-digital converter is as follows: Figure 18 shown.

[0118] The dual-power 16-bit high-speed analog-to-digital converter consists of a sample-and-hold circuit S / H, four four-bit high-speed analog-to-digital cascade converters, two eight-bit latches, and two dual-output regulated power supplies.

[0119] Four four-bit high-speed A / D cascade converters are connected in cascade to form a cascade structure. The analog signal input terminal is connected to the output terminal of the sample and hold circuit S / H, and the sample and hold circuit S / H is connected to an external analog input. Signal.

[0120] The 16-bit digital signals output by four four-bit high-speed A / D cascade converters are respectively connected to the inputs of two eight-bit latches.

[0121] The two regulated power supplies respectively output two groups o...

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PUM

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Abstract

The invention relates to an analogue-to-digital direct operational conversion method and an analogue-to-digital cascade converter and an application thereof, and belongs to the signal measurement and processing, and electronic equipment technical field. The conversion method amplifies a residual voltage signal to twice the size thereof to serve as a cascade signal and the range of an output cascade signal is the same as the range of an input analogue signal. The analogue-to-digital cascade converter is composed of a plurality of AD conversion units which have same structural parameters and are in cascaded structure. The AC conversion units are composed of a voltage comparator, an electric level switch part, an operational amplifier and a resistor; the voltage comparator completes the polarity discrimination of an analog input signal; the resistor is matched with the operational amplifier to complete the residual operation and the function of twice amplification; and the electric level switch part is used for realizing the electric level match of interfaces of an analogue circuit and a digital circuit.

Description

technical field [0001] The present invention relates to an analog-to-digital direct calculation conversion method, an analog-digital cascade converter and its application. The invention relates to a / D converter or a cascaded analog-to-digital converter, which belongs to the technical field of signal measurement and processing and electronic equipment. Background technique [0002] In digital electronic equipment, a large number of analog signals need to be converted into digital signals by analog-to-digital (A / D) converters for digital processing, and the quality of the analog-to-digital converters is crucial to system performance. [0003] There are many forms of analog-to-digital conversion methods, these analog-to-digital conversion methods are usually more complex, each form often corresponds to an analog-to-digital converter, and the most commonly used conversion methods and converters are successive approximation analog-to-digital conversion and successive approximat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/14H03M1/34
Inventor 朱明江秋萍张金龙叶明司霞
Owner SHANGHAI UNIV
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