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Switched capacitor resistance feedback continuous time modulator based on variable resistance

A time modulator and switched capacitor technology, applied in electrical components, code conversion, analog conversion, etc., can solve the problems of high peak current, affecting modulator power consumption and stability, etc., to improve performance, increase complexity and power consumption, the effect of reducing power consumption

Pending Publication Date: 2020-04-10
CHONGQING UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a switched capacitor resistance feedback continuous time modulator based on variable resistors, to solve the problems caused by the direct feedback of the RC structure in the existing traditional switched capacitor resistance feedback continuous time Sigma Delta modulator proposed in the above-mentioned background technology. The problem that the peak current is too large and affects the power consumption and stability of the modulator

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  • Switched capacitor resistance feedback continuous time modulator based on variable resistance
  • Switched capacitor resistance feedback continuous time modulator based on variable resistance
  • Switched capacitor resistance feedback continuous time modulator based on variable resistance

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] see Figure 1-4 , the present invention provides a technical solution: a switched capacitor resistance feedback continuous time modulator based on a variable resistor, including a signal input terminal, an SCR DAC structure, a switch, a CMP processor and a signal output terminal; the number of the switches is three groups , and the signal input end is connected to the CMP processor through a switch, the CMP processor is connected to the signal output end, on...

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Abstract

The invention discloses a switched capacitor resistance feedback continuous time modulator based on variable resistance in the technical field of integrated circuit design. The switched capacitor resistance feedback continuous time modulator comprises a signal input end, an SCR DAC structure, switches, a CMP processor and a signal output end. Three groups of switches are arranged, the signal inputend is connected with the CMP processor through the switches, the CMP processor is connected with the signal output end, one end of the SCR DAC structure is connected with the signal input front endof the switch, the other end of the SCR DAC structure is connected with the signal output end, and the feedback resistance of the SCR DAC structure is adjustable. Thus, the power consumption of the system is reduced, and the stability of the modulator is improved.

Description

technical field [0001] The invention relates to the technical field of integrated circuit design, in particular to a variable resistor-based switched capacitor resistance feedback continuous time modulator. Background technique [0002] With the development of the times, people have put forward more and more stringent requirements on the power consumption and area of ​​the circuit system. As the link between analog and digital, the power consumption of ADC has attracted much attention. The industry once thought that the pipelineADC was the only choice for applications with high dynamic performance below 100MSPS, but the emergence of Sigma DeltaADC subverted people's inherent concepts. A continuous-time Sigma Delta (DTSD) ADC consists of a modulator and a digital decimation filter. Compared with the traditional Nyquist ADC, the CTSD ADC does not need the pre-high linearity anti-aliasing filter and the high-speed gain stage required for sampling. Compared with discrete-time ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M3/00
CPCH03M3/30
Inventor 唐枋兰锋沈九龙马琦赟
Owner CHONGQING UNIV
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