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A circuit to improve the dynamic range of analog-to-digital conversion

An analog-to-digital conversion and dynamic range technology, applied in analog-to-digital converters, electrical components, transmission systems, etc., can solve the problems of reduced signal resolution and power dynamic range, and reduced output digital bit width, etc. Dynamic range enhancement, high-resolution effects

Active Publication Date: 2018-06-19
TRANSCOM INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the sampling rate increases, the output digital bit width of the ADC sampling becomes smaller, and the resolution and power dynamic range of the signal decrease.

Method used

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  • A circuit to improve the dynamic range of analog-to-digital conversion
  • A circuit to improve the dynamic range of analog-to-digital conversion
  • A circuit to improve the dynamic range of analog-to-digital conversion

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Embodiment Construction

[0023] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.

[0024] like Figures 1 to 3 As shown, in one embodiment, the circuit for improving the dynamic range of analog-to-digital conversion includes:

[0025] 1. Coupler: split the IF signal into two, one is the IF signal path, and the other is the IF signal power range discrimination path.

[0026] 2. Gain rule discrimination circuit: including a detector, a voltage comparison circuit, and a gain rule setting circuit, among which:

[0027] 1) The detector detects the power of the intermediate frequency signal, and converts the power value of the intermediate frequency signal into a voltage value for output;

[0028] 2) The voltage comparison circuit compares the voltage value output by the detector with the voltage reference value generated by the gain rule setting circuit to obtain gain discrimination data, an...

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Abstract

The invention relates to a circuit capable of enlarging a dynamic range of analog-digital conversion, wherein a coupler is connected with a gain rule judging circuit and a first intermediate frequency amplifier, the first intermediate frequency amplifier is connected with a controllable gain attenuator, a second intermediate frequency amplifier, an analog-digital conversion module and a control module in sequence, and the control module is connected with the controllable gain attenuator and the gain rule judging circuit. By means of the circuit capable of enlarging the dynamic range of analog-digital conversion, by tracing the power of an intermediate frequency signal, the attenuation value of the controllable gain attenuator is controlled by the control module, so that the gain of the intermediate frequency signal is changed, and by processing the sampling value of the analog-digital conversion module at corresponding moments through an algorithm in the control module, under the condition that the sensitivity of an analog signal is not lost, the high resolution of the analog signal is guaranteed, so that the dynamic range of the analog-digital conversion is enlarged, the cost is low, the structure is simple, and the circuit is easy to achieve and applicable to wider application fields.

Description

technical field [0001] The invention relates to the technical field of analog-to-digital conversion, in particular to the technical field of analog-to-digital conversion directly applied to intermediate frequencies, and specifically refers to a circuit for improving the dynamic range of analog-to-digital conversion. Background technique [0002] As we all know, ADC (Analog-to-Digital Converter, analog-to-digital converter) is used to convert analog signals within a certain bandwidth into digital signals. According to the requirements of Nyquist (Nyquist) law, the sampling rate in the sampling process It needs to be more than twice the sampling bandwidth, and a digital signal with a fixed bit width can be obtained by sampling through the ADC. As the sampling rate increases, the output digital bit width of ADC sampling becomes smaller, and the resolution and power dynamic range of the signal decrease. Contents of the invention [0003] The purpose of the present invention i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12H04B1/16
Inventor 白皓陈爽
Owner TRANSCOM INSTR