Control circuit and electronic equipment of analog-to-digital converter

Abstract

The disclosure relates to a control circuit and electronic equipment of an analog-to-digital converter, so as to improve the signal conversion efficiency of the analog-to-digital converter. The control circuit includes: an analog-to-digital converter, a pulse comparison unit and a control unit, wherein the analog signals to be converted are respectively used as input signals of the analog-to-digital converter and the pulse comparison unit; the pulse comparison unit is connected with the control unit for the analog signal to be converted and the reference signal, determine whether the amplitude of the analog signal to be converted is within the preset range of the analog-to-digital converter, generate a judgment signal according to the determination result, and send the judgment signal to the control unit, wherein the reference signal is Determined based on the preset range; the control unit is connected with the analog-to-digital converter to receive the judgment signal, and output corresponding control instructions to the analog-to-digital converter according to the judgment signal, so as to control the working state of the target integrator in the analog-to-digital converter , where the target integrator is any one or more integrators in the analog-to-digital converter.

Description

technical field [0001] The present disclosure relates to the field of integrated circuit design, in particular, to a control circuit of an analog-to-digital converter and electronic equipment. Background technique [0002] Because the Sigma-Delta analog-to-digital converter has the advantages of easy driving, high precision, and wide bandwidth, this type of analog-to-digital converter is usually used in broadband power line carrier (HPLC) communication modules to realize the acquisition, amplification and conversion of analog communication signals into digital signals For signal processing in digital systems. This type of analog-to-digital converter contains a feedback loop that is overloaded when the amplitude of the analog signal to be converted is large, and the feedback loop oscillates. When the overload condition disappears, it may take several clock cycles before the feedback loop automatically recovers, or it may not recover at all. When the feedback loop is not res...

AI Technical Summary

Problems solved by technology

When the overload condition disappears, it may take several clock cycles before the feedback loop automatically recovers, or it may never recover

When the feedback loop is not restored, the output signal of the analog-to-digital converter is damaged, and the signal-to-noise ratio is severely reduced, resulting in the inability of the analog-to-digital converter to work effectively and poor signal conversion efficiency

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