Bit extending system and bit extending method for analog-to-digital conversion

An analog-to-digital conversion and analog-to-digital technology, which is applied in the field of analog-to-digital conversion bit expansion system, can solve problems such as affecting measurement accuracy, signal leakage, and cost increase, and achieve the effect of improving the misjudgment and signal leakage of the bit expansion system.
CN103546154AActive Publication Date: 2014-01-29GOOD WILL INSTR
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
GOOD WILL INSTR
Publication Date
2014-01-29

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Abstract

The invention relates to a bit extending system and a bit extending method for analog-to-digital conversion. The bit extending method mainly comprises the following steps that a signal amplification module amplifies inputted analog signals into various analog amplification signals with gain ratios, a comparator judges whether the various analog amplification signals with the gain ratios exceed a preset voltage range or not; an analog amplification signal which has the highest gain ratio and does not exceed the voltage range is selected to be inputted in an analog-to-digital converter so as to be sampled and quantified into digital data, and the digital data are transferred rightwards according to the corresponding gain ratio. The gain ratio of an amplifier is not required to be adjusted, so that the noise is avoided, and sampling, quantification and judgment on the level of voltage are not required to be finished by the amplifier and can be finished by the comparator of which the cost is much lower than that of the analog-to-digital converter.
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Description

technical field

[0001] The present invention relates to an analog-to-digital conversion bit extension system, in particular to an analog-to-digital conversion bit extension system with a simplified overall system architecture and low cost. Background technique

[0002] The intermediate frequency signal (Intermediate frequency, IF) mainly refers to a signal source generated after mixing with a local oscillating signal, which is mainly used to up-frequency or down-frequency the signal source to a specific frequency. After receiving at the receiving end, the received signal source must be lowered to the intermediate frequency signal by frequency reduction, and then the signal analysis work is performed.

[0003] Electronic devices with information acquisition functions, such as spectrum analyzers, usually use an analog-to-digital converter (Analog to Digital Converter, ADC) to convert the voltage of the analog intermediate-frequency signal into power during the transmission of ...

Claims

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