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Pre-charge load-balancing switch capacitor circuit and switch capacitor comparator with same

A technology of switched capacitor circuit and precharge switch, applied in multiple input and output pulse circuits and other directions, can solve the problems of multiple power consumption, consumption, increase the bandwidth of the main amplifier, etc., to achieve the optimization of power consumption and speed, and to speed up the settling time. Effect

Inactive Publication Date: 2014-09-17
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is a typical trade-off between power consumption and speed, that is, to increase the speed of Vth establishment in sampling mode, the bandwidth of the main amplifier must be increased, that is, more power consumption is required

Method used

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  • Pre-charge load-balancing switch capacitor circuit and switch capacitor comparator with same
  • Pre-charge load-balancing switch capacitor circuit and switch capacitor comparator with same
  • Pre-charge load-balancing switch capacitor circuit and switch capacitor comparator with same

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Embodiment Construction

[0024] Embodiments of the present invention will be described below with reference to the drawings. Elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that representation and description of components and processes that are not relevant to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity.

[0025] see figure 2 Shown is a circuit diagram of an embodiment of the precharge balanced load switched capacitor circuit of the present invention.

[0026] In this embodiment, the precharge balanced load switched capacitor circuit 2 includes a switched capacitor circuit 22 , a main amplifier 21 and a virtual ground amplifier 23 .

[0027] The main amplifier 21 is used for buffering (ie amplifying with unity gain) the input first analog voltage...

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Abstract

The invention relates to a pre-charge load-balancing switch capacitor circuit and a switch capacitor comparator with the pre-charge load-balancing switch capacitor circuit. The pre-charge load-balancing switch capacitor circuit comprises a switch capacitor circuit, a main amplifier and a virtual ground amplifier. The main amplifier is used for buffering the input first analog voltage signal to form a second analog voltage signal and outputting the second analog voltage signal to the switch capacitor circuit. The switch capacitor circuit is used for conducting sampling on the second analog voltage signal and generating a first sampling signal. The virtual ground amplifier is used for receiving the first sampling signal, amplifying the first sampling signal to form a second sampling signal and outputting the second sampling signal. By means of the pre-charge load-balancing switch capacitor circuit and the switch capacitor comparator with the pre-charge load-balancing switch capacitor circuit, the functions of load balancing and precharging the load capacitor of the main amplifier are achieved, the time spent on building the load capacitor through the main amplifier in the sampling mode is shortened, and the optimization for the power dissipation and speed is achieved.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a precharge balanced load switched capacitor circuit and a switched capacitor comparator comprising the same. Background technique [0002] In analog / mixed-signal integrated circuits, power consumption and speed are a very important trade-off relationship. In order to improve speed, power consumption often needs to be sacrificed. In analog / mixed-signal integrated circuits based on switched capacitor technology, multiple clock phases are often required to process analog signals, such as sample-and-hold, comparison, margin amplification, and integration. [0003] Such as figure 1 As shown, taking the traditional switched capacitor comparator 1 as an example, it includes a main amplifier 11, a switched capacitor network 12 and a virtual ground amplifier 13 to realize the comparison between the input signal Vin and the threshold level Vth. It works in two modes: samplin...

Claims

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Application Information

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IPC IPC(8): H03K5/22
Inventor 陆波尹国和陈勇
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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