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Delta-sigma modulator, analogue digital conversion circuit, Delta-sigma modulation method, and analogue digital converion method

An analog-to-digital conversion, delta-sigma technology, applied in analog-to-digital conversion, code conversion, electrical components, etc., can solve problems such as inapplicability of delta-sigma modulators, limiting the practicality of digital extra loop delay compensation methods, etc.

Inactive Publication Date: 2016-11-09
MEDIATEK SINGAPORE PTE LTD SINGAPORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, existing methods for compensating for digital extra loop delays are not suitable for delta-sigma modulators at high clock rates
For example, when the clock rate exceeds 2GHz, the power size considerations used to meet the operational constraints can severely limit the practicality of this existing digital excess loop delay compensation method

Method used

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  • Delta-sigma modulator, analogue digital conversion circuit, Delta-sigma modulation method, and analogue digital converion method
  • Delta-sigma modulator, analogue digital conversion circuit, Delta-sigma modulation method, and analogue digital converion method
  • Delta-sigma modulator, analogue digital conversion circuit, Delta-sigma modulation method, and analogue digital converion method

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Embodiment Construction

[0017] Certain terms are used in the specification and subsequent claims to refer to particular components. Those of ordinary skill in the art will appreciate that hardware manufacturers may refer to the same component by different terms. This specification and subsequent patent applications do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The "comprising" mentioned throughout the specification and subsequent claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described in the text that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection me...

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Abstract

A delta-sigma modulator includes a signal subtraction circuit, a loop filter, a quantizer, a digital-to-analog converter (DAC), and a control circuit. The signal subtraction circuit subtracts an analog feedback signal from an analog input signal to generate a difference signal. The loop filter performs a filtering operation upon the difference signal to generate a filtered signal. The quantizer quantizes the filtered signal into a digital output signal, wherein at least one inherent circuit characteristic of the quantizer are adjusted in response to a digital code input. The DAC generates the analog feedback signal according to the digital output signal. The control circuit generates the digital code input to the quantizer for setting an excess loop delay (ELD) compensation.

Description

[0001] Cross references to related patent applications [0002] This application claims priority to U.S. Provisional Application No. 61 / 929,688 (filed January 21, 2014, entitled "Method and Apparatus for Additional Loop Delay Compensation in a Delta-Sigma Modulator"), which All content of is incorporated by reference. technical field [0003] Embodiments provided by the present invention relate to the category of converting an analog signal into a digital signal, and in particular to a method and an apparatus for providing additional delay compensation in a delta-sigma (ΔΣ) modulator. Background technique [0004] Over the years, analog technology has played an important role in the field of signal processing, and digital technology has gradually developed in this field. An analog-to-digital converter is used to convert an analog signal into a digital signal so that the signal can be processed in a digital domain. For example, a delta-sigma analog-to-digital converter (ΔΣa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M3/00
CPCH03M3/37H03M3/424H03M3/422H03M3/50
Inventor 罗启伦史黛西·何
Owner MEDIATEK SINGAPORE PTE LTD SINGAPORE