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Analog-to-digital conversion equipment

A conversion equipment, analog-to-digital technology, applied in the direction of analog-to-digital conversion, analog-to-digital converter, analog-to-analog conversion, etc., can solve the problem of operating frequency bottleneck of the operation speed circuit

Inactive Publication Date: 2019-03-01
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, the operational speed of the cyclic A / D converter may become the bottleneck of the operating frequency of the circuit

Method used

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  • Analog-to-digital conversion equipment
  • Analog-to-digital conversion equipment
  • Analog-to-digital conversion equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0028]

[0029] The analog-to-digital (A / D) conversion device 1 according to the embodiment functions as a delta-sigma (ΔΣ) A / D converter for processing an analog input signal, and also functions as a loop A for processing the remainder of the quantization / D converter. Therefore, the A / D conversion device 1 is a hybrid A / D conversion device for generating an A / D conversion result Do of an analog input signal.

[0030] Such as figure 1 As shown in , the A / D conversion device 1 includes a signal processor 10 , a quantizer 20 and a controller 30 .

[0031]

[0032] The signal processor 10 includes a first circuit block BL1 and a second circuit block BL2. Since the first circuit block BL2 and the second circuit block BL2 have the same structure except for the capacitance of the capacitor, they are collectively and simply referred to as "circuit block BL" hereinaf...

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PUM

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Abstract

The invention describes an A / D conversion device comprising a signal processor (10), a quantizer (20, 20a, 20b) and a controller (30). The signal processor has circuit blocks (BL1, BL2, BL2a) connected in a loop to process analog input signals. The quantizer generates a quantized value by quantizing an output of at least one of circuit blocks including a final stage circuit block. In each circuit block, one end of the first capacitor (C1) is connected to the input terminal of the operational amplifier (16) through a switch (SS3), and one end of each of the second and third capacitors (C2, C3) Connect directly to the op amp. The controller generates an A / D conversion result of the analog input signal based on the quantization value and changes a connection condition of the capacitor so that the signal processor and the quantizer function as a delta-sigma modulator Or loop A / D converter.

Description

technical field [0001] The present disclosure relates to a hybrid analog-to-digital (A / D) conversion device in which a delta-sigma A / D converter and a cyclic A / D converter are combined such that they can share a portion of their circuitry and pass the mode of operation switch to perform its corresponding A / D conversion. Background technique [0002] There has been proposed an A / D conversion device that generates the most significant bit of the A / D conversion result by performing A / D conversion of an analog input signal using a delta-sigma (ΔΣ) modulator, and the rest by performing quantization. Part of the cyclic A / D conversion to generate the least significant bit, and output the A / D conversion result of the analog input signal by combining the most significant bit and the least significant bit. [0003] Each of the delta-sigma modulator and the cyclic A / D converter has an operational amplifier as its main part. In the technique disclosed in JP-B2-04862943 corresponding t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
CPCH03M1/403H03M3/398H03M3/422
Inventor 根塚智裕
Owner DENSO CORP